./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 30f0768bbff34913c5dfb0ad37a2819c04e85c489714efe7283dacc3cb1675b9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:42:18,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:42:18,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:42:18,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:42:18,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:42:18,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:42:18,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:42:18,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:42:18,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:42:18,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:42:18,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:42:18,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:42:18,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:42:18,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:42:18,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:42:18,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:42:18,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:42:18,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:42:18,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:42:18,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:42:18,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:42:18,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:42:18,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:42:18,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:42:18,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:42:18,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:42:18,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:42:18,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:42:18,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:42:18,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:42:18,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:42:18,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:42:18,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:42:18,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:42:18,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:42:18,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:42:18,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:42:18,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:42:18,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:42:18,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:42:18,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:42:18,472 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:42:18,516 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:42:18,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:42:18,518 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:42:18,518 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:42:18,519 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:42:18,519 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:42:18,519 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:42:18,519 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:42:18,525 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:42:18,526 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:42:18,527 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:42:18,527 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:42:18,527 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:42:18,527 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:42:18,528 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:42:18,528 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:42:18,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:42:18,529 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:42:18,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:42:18,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:42:18,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:42:18,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:42:18,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:42:18,530 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:42:18,531 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:42:18,531 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:42:18,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:42:18,531 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:42:18,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:42:18,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:42:18,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:42:18,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:42:18,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:42:18,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:42:18,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:42:18,535 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:42:18,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:42:18,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:42:18,535 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:42:18,535 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:42:18,536 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_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30f0768bbff34913c5dfb0ad37a2819c04e85c489714efe7283dacc3cb1675b9 [2021-11-12 23:42:18,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:42:18,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:42:18,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:42:18,829 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:42:18,830 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:42:18,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 23:42:18,914 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/data/f5821d091/2bd3ebc62e7641f1bfbf633696bc901f/FLAG0f73c50ca [2021-11-12 23:42:19,509 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:42:19,512 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 23:42:19,537 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/data/f5821d091/2bd3ebc62e7641f1bfbf633696bc901f/FLAG0f73c50ca [2021-11-12 23:42:19,806 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/data/f5821d091/2bd3ebc62e7641f1bfbf633696bc901f [2021-11-12 23:42:19,809 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:42:19,810 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:42:19,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:42:19,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:42:19,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:42:19,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:42:19" (1/1) ... [2021-11-12 23:42:19,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cf50410 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:19, skipping insertion in model container [2021-11-12 23:42:19,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:42:19" (1/1) ... [2021-11-12 23:42:19,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:42:19,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:42:20,292 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9094,9107] [2021-11-12 23:42:20,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:42:20,416 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:42:20,490 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[9094,9107] [2021-11-12 23:42:20,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:42:20,556 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:42:20,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:20 WrapperNode [2021-11-12 23:42:20,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:42:20,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:42:20,559 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:42:20,559 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:42:20,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:20" (1/1) ... [2021-11-12 23:42:20,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:20" (1/1) ... [2021-11-12 23:42:20,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:42:20,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:42:20,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:42:20,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:42:20,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:20" (1/1) ... [2021-11-12 23:42:20,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:20" (1/1) ... [2021-11-12 23:42:20,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:20" (1/1) ... [2021-11-12 23:42:20,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:20" (1/1) ... [2021-11-12 23:42:20,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:20" (1/1) ... [2021-11-12 23:42:20,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:20" (1/1) ... [2021-11-12 23:42:20,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:20" (1/1) ... [2021-11-12 23:42:20,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:42:20,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:42:20,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:42:20,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:42:20,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:20" (1/1) ... [2021-11-12 23:42:20,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:42:20,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:42:20,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:42:20,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:42:20,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:42:20,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:42:20,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:42:20,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:42:21,862 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:42:21,863 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:42:21,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:42:21 BoogieIcfgContainer [2021-11-12 23:42:21,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:42:21,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:42:21,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:42:21,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:42:21,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:42:19" (1/3) ... [2021-11-12 23:42:21,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e23eb7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:42:21, skipping insertion in model container [2021-11-12 23:42:21,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:20" (2/3) ... [2021-11-12 23:42:21,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e23eb7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:42:21, skipping insertion in model container [2021-11-12 23:42:21,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:42:21" (3/3) ... [2021-11-12 23:42:21,876 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 23:42:21,882 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:42:21,883 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:42:21,933 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:42:21,940 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:42:21,940 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:42:21,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 122 states have (on average 1.7704918032786885) internal successors, (216), 123 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:21,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-12 23:42:21,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:21,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:21,969 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:21,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:21,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1269394098, now seen corresponding path program 1 times [2021-11-12 23:42:21,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:42:21,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633878608] [2021-11-12 23:42:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:21,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:42:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:22,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:42:22,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633878608] [2021-11-12 23:42:22,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633878608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:22,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:22,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:42:22,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498345065] [2021-11-12 23:42:22,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:22,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:42:22,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:42:22,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:42:22,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:42:22,454 INFO L87 Difference]: Start difference. First operand has 124 states, 122 states have (on average 1.7704918032786885) internal successors, (216), 123 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:22,658 INFO L93 Difference]: Finished difference Result 191 states and 317 transitions. [2021-11-12 23:42:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:42:22,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 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 77 [2021-11-12 23:42:22,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:22,670 INFO L225 Difference]: With dead ends: 191 [2021-11-12 23:42:22,671 INFO L226 Difference]: Without dead ends: 122 [2021-11-12 23:42:22,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:42:22,677 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 502 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.48ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 135.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:22,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 197 Invalid, 104 Unknown, 0 Unchecked, 6.48ms Time], IncrementalHoareTripleChecker [7 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 135.33ms Time] [2021-11-12 23:42:22,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-12 23:42:22,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-12 23:42:22,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 121 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:22,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 147 transitions. [2021-11-12 23:42:22,722 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 147 transitions. Word has length 77 [2021-11-12 23:42:22,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:22,723 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 147 transitions. [2021-11-12 23:42:22,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:22,724 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 147 transitions. [2021-11-12 23:42:22,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-12 23:42:22,727 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:22,727 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:22,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:42:22,728 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:22,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:22,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1646034187, now seen corresponding path program 1 times [2021-11-12 23:42:22,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:42:22,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193358905] [2021-11-12 23:42:22,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:22,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:42:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:22,896 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:42:22,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193358905] [2021-11-12 23:42:22,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193358905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:22,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:22,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:42:22,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361577815] [2021-11-12 23:42:22,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:22,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:42:22,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:42:22,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:42:22,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:42:22,903 INFO L87 Difference]: Start difference. First operand 122 states and 147 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:23,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:23,055 INFO L93 Difference]: Finished difference Result 191 states and 238 transitions. [2021-11-12 23:42:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:42:23,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-12 23:42:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:23,062 INFO L225 Difference]: With dead ends: 191 [2021-11-12 23:42:23,062 INFO L226 Difference]: Without dead ends: 122 [2021-11-12 23:42:23,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:42:23,070 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 358 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.78ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:23,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 3.78ms Time], IncrementalHoareTripleChecker [7 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 95.78ms Time] [2021-11-12 23:42:23,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-12 23:42:23,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-12 23:42:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1983471074380165) internal successors, (145), 121 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:23,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2021-11-12 23:42:23,094 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 78 [2021-11-12 23:42:23,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:23,095 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2021-11-12 23:42:23,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:23,095 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2021-11-12 23:42:23,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-12 23:42:23,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:23,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:23,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:42:23,099 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:23,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:23,100 INFO L85 PathProgramCache]: Analyzing trace with hash -513507090, now seen corresponding path program 1 times [2021-11-12 23:42:23,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:42:23,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131699957] [2021-11-12 23:42:23,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:23,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:42:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:23,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:42:23,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131699957] [2021-11-12 23:42:23,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131699957] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:23,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:23,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:42:23,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556426845] [2021-11-12 23:42:23,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:23,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:42:23,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:42:23,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:42:23,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:42:23,264 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:23,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:23,423 INFO L93 Difference]: Finished difference Result 187 states and 230 transitions. [2021-11-12 23:42:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:42:23,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-12 23:42:23,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:23,429 INFO L225 Difference]: With dead ends: 187 [2021-11-12 23:42:23,429 INFO L226 Difference]: Without dead ends: 122 [2021-11-12 23:42:23,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:42:23,438 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 340 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.11ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 120.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:23,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 100 Invalid, 80 Unknown, 0 Unchecked, 3.11ms Time], IncrementalHoareTripleChecker [7 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 120.31ms Time] [2021-11-12 23:42:23,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-12 23:42:23,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-12 23:42:23,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1818181818181819) internal successors, (143), 121 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2021-11-12 23:42:23,463 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 79 [2021-11-12 23:42:23,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:23,465 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2021-11-12 23:42:23,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:23,465 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2021-11-12 23:42:23,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-12 23:42:23,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:23,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:23,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:42:23,469 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:23,470 INFO L85 PathProgramCache]: Analyzing trace with hash -540998025, now seen corresponding path program 1 times [2021-11-12 23:42:23,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:42:23,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436274459] [2021-11-12 23:42:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:23,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:42:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:23,651 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:42:23,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436274459] [2021-11-12 23:42:23,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436274459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:23,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:23,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:42:23,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435640225] [2021-11-12 23:42:23,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:23,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:42:23,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:42:23,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:42:23,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:42:23,656 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:23,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:23,788 INFO L93 Difference]: Finished difference Result 195 states and 235 transitions. [2021-11-12 23:42:23,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:42:23,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-12 23:42:23,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:23,791 INFO L225 Difference]: With dead ends: 195 [2021-11-12 23:42:23,792 INFO L226 Difference]: Without dead ends: 122 [2021-11-12 23:42:23,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:42:23,802 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 357 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.83ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:23,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 84 Invalid, 78 Unknown, 0 Unchecked, 1.83ms Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 93.16ms Time] [2021-11-12 23:42:23,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-12 23:42:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-12 23:42:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.165289256198347) internal successors, (141), 121 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2021-11-12 23:42:23,827 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 80 [2021-11-12 23:42:23,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:23,828 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2021-11-12 23:42:23,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2021-11-12 23:42:23,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-12 23:42:23,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:23,834 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:23,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:42:23,834 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:23,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:23,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1188164518, now seen corresponding path program 1 times [2021-11-12 23:42:23,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:42:23,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295764978] [2021-11-12 23:42:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:23,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:42:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:23,955 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:42:23,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295764978] [2021-11-12 23:42:23,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295764978] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:23,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:23,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:42:23,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509390775] [2021-11-12 23:42:23,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:23,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:42:23,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:42:23,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:42:23,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:42:23,958 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:24,096 INFO L93 Difference]: Finished difference Result 199 states and 236 transitions. [2021-11-12 23:42:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:42:24,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-11-12 23:42:24,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:24,098 INFO L225 Difference]: With dead ends: 199 [2021-11-12 23:42:24,099 INFO L226 Difference]: Without dead ends: 122 [2021-11-12 23:42:24,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:42:24,100 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 302 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 86.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.47ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.90ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:24,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 103 Invalid, 112 Unknown, 0 Unchecked, 2.47ms Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 104.90ms Time] [2021-11-12 23:42:24,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-12 23:42:24,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-12 23:42:24,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.1570247933884297) internal successors, (140), 121 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:24,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2021-11-12 23:42:24,118 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 81 [2021-11-12 23:42:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:24,122 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2021-11-12 23:42:24,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2021-11-12 23:42:24,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-12 23:42:24,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:24,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:24,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:42:24,131 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:24,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:24,132 INFO L85 PathProgramCache]: Analyzing trace with hash 645623011, now seen corresponding path program 1 times [2021-11-12 23:42:24,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:42:24,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124037966] [2021-11-12 23:42:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:24,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:42:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:24,277 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:42:24,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124037966] [2021-11-12 23:42:24,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124037966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:24,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:24,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:42:24,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865363005] [2021-11-12 23:42:24,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:24,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:42:24,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:42:24,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:42:24,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:42:24,279 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:24,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:24,384 INFO L93 Difference]: Finished difference Result 179 states and 214 transitions. [2021-11-12 23:42:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:42:24,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-11-12 23:42:24,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:24,385 INFO L225 Difference]: With dead ends: 179 [2021-11-12 23:42:24,386 INFO L226 Difference]: Without dead ends: 122 [2021-11-12 23:42:24,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:42:24,389 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 299 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.10ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:24,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 116 Invalid, 75 Unknown, 0 Unchecked, 2.10ms Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 77.00ms Time] [2021-11-12 23:42:24,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-12 23:42:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-12 23:42:24,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.140495867768595) internal successors, (138), 121 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:24,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 138 transitions. [2021-11-12 23:42:24,401 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 138 transitions. Word has length 82 [2021-11-12 23:42:24,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:24,403 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 138 transitions. [2021-11-12 23:42:24,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 138 transitions. [2021-11-12 23:42:24,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-12 23:42:24,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:24,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:24,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:42:24,404 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:24,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:24,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1891597942, now seen corresponding path program 1 times [2021-11-12 23:42:24,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:42:24,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738513789] [2021-11-12 23:42:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:24,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:42:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:33,601 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:42:33,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738513789] [2021-11-12 23:42:33,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738513789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:33,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:33,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-11-12 23:42:33,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787706017] [2021-11-12 23:42:33,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:33,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-12 23:42:33,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:42:33,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-12 23:42:33,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1390, Unknown=0, NotChecked=0, Total=1560 [2021-11-12 23:42:33,604 INFO L87 Difference]: Start difference. First operand 122 states and 138 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:44,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:44,544 INFO L93 Difference]: Finished difference Result 292 states and 368 transitions. [2021-11-12 23:42:44,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-12 23:42:44,544 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-12 23:42:44,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:44,547 INFO L225 Difference]: With dead ends: 292 [2021-11-12 23:42:44,547 INFO L226 Difference]: Without dead ends: 248 [2021-11-12 23:42:44,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1332, Invalid=4520, Unknown=0, NotChecked=0, Total=5852 [2021-11-12 23:42:44,551 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 1306 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1971 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1782.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1306 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.90ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2044.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:44,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1306 Valid, 913 Invalid, 2041 Unknown, 0 Unchecked, 15.90ms Time], IncrementalHoareTripleChecker [70 Valid, 1971 Invalid, 0 Unknown, 0 Unchecked, 2044.31ms Time] [2021-11-12 23:42:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-12 23:42:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 161. [2021-11-12 23:42:44,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.19375) internal successors, (191), 160 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 191 transitions. [2021-11-12 23:42:44,573 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 191 transitions. Word has length 83 [2021-11-12 23:42:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:44,573 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 191 transitions. [2021-11-12 23:42:44,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 39 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:44,574 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 191 transitions. [2021-11-12 23:42:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 23:42:44,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:44,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:44,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:42:44,575 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:44,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:44,577 INFO L85 PathProgramCache]: Analyzing trace with hash -71974936, now seen corresponding path program 1 times [2021-11-12 23:42:44,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:42:44,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056627097] [2021-11-12 23:42:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:44,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:42:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:44,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:42:44,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056627097] [2021-11-12 23:42:44,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056627097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:44,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:44,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:42:44,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397260978] [2021-11-12 23:42:44,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:44,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:42:44,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:42:44,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:42:44,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:42:44,742 INFO L87 Difference]: Start difference. First operand 161 states and 191 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:44,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:44,833 INFO L93 Difference]: Finished difference Result 327 states and 417 transitions. [2021-11-12 23:42:44,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:42:44,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 85 [2021-11-12 23:42:44,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:44,836 INFO L225 Difference]: With dead ends: 327 [2021-11-12 23:42:44,836 INFO L226 Difference]: Without dead ends: 244 [2021-11-12 23:42:44,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:42:44,837 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 56 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.08ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.04ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:44,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 363 Invalid, 56 Unknown, 0 Unchecked, 2.08ms Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 49.04ms Time] [2021-11-12 23:42:44,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-12 23:42:44,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2021-11-12 23:42:44,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.2531120331950207) internal successors, (302), 241 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:44,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 302 transitions. [2021-11-12 23:42:44,876 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 302 transitions. Word has length 85 [2021-11-12 23:42:44,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:44,876 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 302 transitions. [2021-11-12 23:42:44,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:42:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 302 transitions. [2021-11-12 23:42:44,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-12 23:42:44,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:44,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:44,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:42:44,878 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:44,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:44,879 INFO L85 PathProgramCache]: Analyzing trace with hash 158518031, now seen corresponding path program 1 times [2021-11-12 23:42:44,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:42:44,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639245076] [2021-11-12 23:42:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:44,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:42:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:42:54,371 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:42:54,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639245076] [2021-11-12 23:42:54,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639245076] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:54,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:54,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-11-12 23:42:54,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727851513] [2021-11-12 23:42:54,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:54,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-12 23:42:54,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:42:54,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-12 23:42:54,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2021-11-12 23:42:54,375 INFO L87 Difference]: Start difference. First operand 242 states and 302 transitions. Second operand has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:09,838 INFO L93 Difference]: Finished difference Result 495 states and 643 transitions. [2021-11-12 23:43:09,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-12 23:43:09,838 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 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 85 [2021-11-12 23:43:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:09,840 INFO L225 Difference]: With dead ends: 495 [2021-11-12 23:43:09,840 INFO L226 Difference]: Without dead ends: 331 [2021-11-12 23:43:09,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=1486, Invalid=5320, Unknown=0, NotChecked=0, Total=6806 [2021-11-12 23:43:09,844 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1181 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 3293 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3117.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 1495 SdHoareTripleChecker+Invalid, 3404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.60ms SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3557.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:09,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1181 Valid, 1495 Invalid, 3404 Unknown, 0 Unchecked, 16.60ms Time], IncrementalHoareTripleChecker [111 Valid, 3293 Invalid, 0 Unknown, 0 Unchecked, 3557.33ms Time] [2021-11-12 23:43:09,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-12 23:43:09,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 325. [2021-11-12 23:43:09,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.2777777777777777) internal successors, (414), 324 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:09,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 414 transitions. [2021-11-12 23:43:09,896 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 414 transitions. Word has length 85 [2021-11-12 23:43:09,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:09,897 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 414 transitions. [2021-11-12 23:43:09,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:09,897 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 414 transitions. [2021-11-12 23:43:09,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:43:09,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:09,899 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:09,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:43:09,899 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:09,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:09,900 INFO L85 PathProgramCache]: Analyzing trace with hash 630767134, now seen corresponding path program 1 times [2021-11-12 23:43:09,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:09,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639758136] [2021-11-12 23:43:09,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:09,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:09,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:43:09,982 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:09,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639758136] [2021-11-12 23:43:09,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639758136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:09,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:09,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 23:43:09,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680477718] [2021-11-12 23:43:09,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:09,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:43:09,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:09,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:43:09,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:43:09,988 INFO L87 Difference]: Start difference. First operand 325 states and 414 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:10,226 INFO L93 Difference]: Finished difference Result 635 states and 831 transitions. [2021-11-12 23:43:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:43:10,227 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 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 86 [2021-11-12 23:43:10,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:10,230 INFO L225 Difference]: With dead ends: 635 [2021-11-12 23:43:10,230 INFO L226 Difference]: Without dead ends: 510 [2021-11-12 23:43:10,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:43:10,232 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 284 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 95.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.50ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.28ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:10,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 710 Invalid, 138 Unknown, 0 Unchecked, 5.50ms Time], IncrementalHoareTripleChecker [5 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 113.28ms Time] [2021-11-12 23:43:10,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-11-12 23:43:10,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 282. [2021-11-12 23:43:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.2597864768683273) internal successors, (354), 281 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 354 transitions. [2021-11-12 23:43:10,287 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 354 transitions. Word has length 86 [2021-11-12 23:43:10,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:10,288 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 354 transitions. [2021-11-12 23:43:10,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 354 transitions. [2021-11-12 23:43:10,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 23:43:10,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:10,290 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:10,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:43:10,290 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:10,291 INFO L85 PathProgramCache]: Analyzing trace with hash 627708026, now seen corresponding path program 1 times [2021-11-12 23:43:10,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:10,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340764440] [2021-11-12 23:43:10,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:10,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:10,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:43:10,368 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:10,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340764440] [2021-11-12 23:43:10,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340764440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:10,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:10,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:43:10,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387583229] [2021-11-12 23:43:10,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:10,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:43:10,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:10,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:43:10,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:43:10,371 INFO L87 Difference]: Start difference. First operand 282 states and 354 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:10,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:10,474 INFO L93 Difference]: Finished difference Result 556 states and 727 transitions. [2021-11-12 23:43:10,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:43:10,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 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 101 [2021-11-12 23:43:10,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:10,478 INFO L225 Difference]: With dead ends: 556 [2021-11-12 23:43:10,478 INFO L226 Difference]: Without dead ends: 352 [2021-11-12 23:43:10,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:43:10,479 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 51 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.74ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:10,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 280 Invalid, 34 Unknown, 0 Unchecked, 0.74ms Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 38.30ms Time] [2021-11-12 23:43:10,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-12 23:43:10,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 334. [2021-11-12 23:43:10,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 1.2672672672672673) internal successors, (422), 333 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:10,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 422 transitions. [2021-11-12 23:43:10,537 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 422 transitions. Word has length 101 [2021-11-12 23:43:10,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:10,538 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 422 transitions. [2021-11-12 23:43:10,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:10,538 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 422 transitions. [2021-11-12 23:43:10,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-12 23:43:10,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:10,539 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:10,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 23:43:10,540 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:10,541 INFO L85 PathProgramCache]: Analyzing trace with hash -153234882, now seen corresponding path program 1 times [2021-11-12 23:43:10,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:10,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382060250] [2021-11-12 23:43:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:10,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:10,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:43:10,607 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:10,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382060250] [2021-11-12 23:43:10,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382060250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:10,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:10,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:43:10,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303833741] [2021-11-12 23:43:10,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:10,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:43:10,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:10,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:43:10,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:43:10,610 INFO L87 Difference]: Start difference. First operand 334 states and 422 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:10,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:10,734 INFO L93 Difference]: Finished difference Result 758 states and 998 transitions. [2021-11-12 23:43:10,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:43:10,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 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 104 [2021-11-12 23:43:10,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:10,738 INFO L225 Difference]: With dead ends: 758 [2021-11-12 23:43:10,738 INFO L226 Difference]: Without dead ends: 506 [2021-11-12 23:43:10,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:43:10,740 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 46 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.71ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:10,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 274 Invalid, 34 Unknown, 0 Unchecked, 0.71ms Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 37.23ms Time] [2021-11-12 23:43:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-12 23:43:10,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 480. [2021-11-12 23:43:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 1.2964509394572026) internal successors, (621), 479 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 621 transitions. [2021-11-12 23:43:10,832 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 621 transitions. Word has length 104 [2021-11-12 23:43:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:10,832 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 621 transitions. [2021-11-12 23:43:10,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:10,833 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 621 transitions. [2021-11-12 23:43:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-12 23:43:10,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:10,835 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:10,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-12 23:43:10,835 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:10,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:10,836 INFO L85 PathProgramCache]: Analyzing trace with hash -968341393, now seen corresponding path program 1 times [2021-11-12 23:43:10,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:10,836 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297058777] [2021-11-12 23:43:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:10,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:43:10,914 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:10,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297058777] [2021-11-12 23:43:10,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297058777] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:10,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:10,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:43:10,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821531461] [2021-11-12 23:43:10,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:10,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:43:10,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:10,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:43:10,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:43:10,917 INFO L87 Difference]: Start difference. First operand 480 states and 621 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:11,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:11,097 INFO L93 Difference]: Finished difference Result 1214 states and 1619 transitions. [2021-11-12 23:43:11,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:43:11,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 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 107 [2021-11-12 23:43:11,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:11,102 INFO L225 Difference]: With dead ends: 1214 [2021-11-12 23:43:11,103 INFO L226 Difference]: Without dead ends: 816 [2021-11-12 23:43:11,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:43:11,104 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 41 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.67ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:11,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 267 Invalid, 35 Unknown, 0 Unchecked, 0.67ms Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 38.31ms Time] [2021-11-12 23:43:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-11-12 23:43:11,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 778. [2021-11-12 23:43:11,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.3191763191763193) internal successors, (1025), 777 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1025 transitions. [2021-11-12 23:43:11,250 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1025 transitions. Word has length 107 [2021-11-12 23:43:11,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:11,251 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1025 transitions. [2021-11-12 23:43:11,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:11,251 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1025 transitions. [2021-11-12 23:43:11,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-12 23:43:11,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:11,252 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:11,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-12 23:43:11,253 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:11,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:11,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1044275033, now seen corresponding path program 1 times [2021-11-12 23:43:11,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:11,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366428528] [2021-11-12 23:43:11,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:11,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:11,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:43:11,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:11,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366428528] [2021-11-12 23:43:11,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366428528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:11,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:11,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:43:11,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600783351] [2021-11-12 23:43:11,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:11,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:43:11,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:11,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:43:11,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:43:11,320 INFO L87 Difference]: Start difference. First operand 778 states and 1025 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:11,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:11,624 INFO L93 Difference]: Finished difference Result 2126 states and 2855 transitions. [2021-11-12 23:43:11,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:43:11,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 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 110 [2021-11-12 23:43:11,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:11,633 INFO L225 Difference]: With dead ends: 2126 [2021-11-12 23:43:11,633 INFO L226 Difference]: Without dead ends: 1430 [2021-11-12 23:43:11,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:43:11,636 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 36 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.67ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:11,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 260 Invalid, 36 Unknown, 0 Unchecked, 0.67ms Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 39.54ms Time] [2021-11-12 23:43:11,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2021-11-12 23:43:11,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1368. [2021-11-12 23:43:11,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 1.332114118507681) internal successors, (1821), 1367 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:11,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1821 transitions. [2021-11-12 23:43:11,898 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1821 transitions. Word has length 110 [2021-11-12 23:43:11,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:11,898 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 1821 transitions. [2021-11-12 23:43:11,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:11,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1821 transitions. [2021-11-12 23:43:11,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:43:11,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:11,900 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:11,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-12 23:43:11,900 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:11,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2140177647, now seen corresponding path program 1 times [2021-11-12 23:43:11,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:11,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493118042] [2021-11-12 23:43:11,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:11,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:43:11,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:11,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493118042] [2021-11-12 23:43:11,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493118042] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:11,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:11,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:43:11,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968794762] [2021-11-12 23:43:11,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:11,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:43:11,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:11,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:43:11,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:43:11,969 INFO L87 Difference]: Start difference. First operand 1368 states and 1821 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:12,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:12,504 INFO L93 Difference]: Finished difference Result 3914 states and 5267 transitions. [2021-11-12 23:43:12,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:43:12,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 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 113 [2021-11-12 23:43:12,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:12,520 INFO L225 Difference]: With dead ends: 3914 [2021-11-12 23:43:12,520 INFO L226 Difference]: Without dead ends: 2628 [2021-11-12 23:43:12,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:43:12,525 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 31 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.65ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:12,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 253 Invalid, 37 Unknown, 0 Unchecked, 0.65ms Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 38.71ms Time] [2021-11-12 23:43:12,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-11-12 23:43:12,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 2518. [2021-11-12 23:43:12,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2518 states, 2517 states have (on average 1.3369090186730235) internal successors, (3365), 2517 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2518 states to 2518 states and 3365 transitions. [2021-11-12 23:43:12,938 INFO L78 Accepts]: Start accepts. Automaton has 2518 states and 3365 transitions. Word has length 113 [2021-11-12 23:43:12,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:12,938 INFO L470 AbstractCegarLoop]: Abstraction has 2518 states and 3365 transitions. [2021-11-12 23:43:12,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:12,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2518 states and 3365 transitions. [2021-11-12 23:43:12,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 23:43:12,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:12,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:12,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-12 23:43:12,941 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:12,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:12,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1258154352, now seen corresponding path program 1 times [2021-11-12 23:43:12,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:12,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036221598] [2021-11-12 23:43:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:12,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:43:13,008 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:13,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036221598] [2021-11-12 23:43:13,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036221598] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:13,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:13,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:43:13,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057856757] [2021-11-12 23:43:13,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:13,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:43:13,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:13,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:43:13,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:43:13,011 INFO L87 Difference]: Start difference. First operand 2518 states and 3365 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:13,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:13,974 INFO L93 Difference]: Finished difference Result 7382 states and 9923 transitions. [2021-11-12 23:43:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:43:13,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 116 [2021-11-12 23:43:13,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:14,001 INFO L225 Difference]: With dead ends: 7382 [2021-11-12 23:43:14,002 INFO L226 Difference]: Without dead ends: 4946 [2021-11-12 23:43:14,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:43:14,006 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 26 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.60ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.30ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:14,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 242 Invalid, 38 Unknown, 0 Unchecked, 0.60ms Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 40.30ms Time] [2021-11-12 23:43:14,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4946 states. [2021-11-12 23:43:14,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4946 to 4740. [2021-11-12 23:43:14,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4740 states, 4739 states have (on average 1.33635788140958) internal successors, (6333), 4739 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4740 states to 4740 states and 6333 transitions. [2021-11-12 23:43:14,937 INFO L78 Accepts]: Start accepts. Automaton has 4740 states and 6333 transitions. Word has length 116 [2021-11-12 23:43:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:14,938 INFO L470 AbstractCegarLoop]: Abstraction has 4740 states and 6333 transitions. [2021-11-12 23:43:14,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:14,938 INFO L276 IsEmpty]: Start isEmpty. Operand 4740 states and 6333 transitions. [2021-11-12 23:43:14,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:43:14,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:14,940 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:14,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-12 23:43:14,941 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:14,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:14,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1922414867, now seen corresponding path program 1 times [2021-11-12 23:43:14,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:14,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279665027] [2021-11-12 23:43:14,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:14,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 23:43:15,088 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:43:15,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279665027] [2021-11-12 23:43:15,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279665027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:15,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:43:15,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-12 23:43:15,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899463650] [2021-11-12 23:43:15,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:15,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:43:15,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:43:15,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:43:15,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:43:15,091 INFO L87 Difference]: Start difference. First operand 4740 states and 6333 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:16,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:16,189 INFO L93 Difference]: Finished difference Result 9398 states and 12584 transitions. [2021-11-12 23:43:16,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:43:16,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 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 137 [2021-11-12 23:43:16,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:16,216 INFO L225 Difference]: With dead ends: 9398 [2021-11-12 23:43:16,216 INFO L226 Difference]: Without dead ends: 4740 [2021-11-12 23:43:16,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:43:16,225 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 381 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.21ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.68ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:16,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 105 Invalid, 113 Unknown, 0 Unchecked, 1.21ms Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 105.68ms Time] [2021-11-12 23:43:16,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4740 states. [2021-11-12 23:43:17,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4740 to 4740. [2021-11-12 23:43:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4740 states, 4739 states have (on average 1.3025954842793839) internal successors, (6173), 4739 states have internal predecessors, (6173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4740 states to 4740 states and 6173 transitions. [2021-11-12 23:43:17,068 INFO L78 Accepts]: Start accepts. Automaton has 4740 states and 6173 transitions. Word has length 137 [2021-11-12 23:43:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:17,069 INFO L470 AbstractCegarLoop]: Abstraction has 4740 states and 6173 transitions. [2021-11-12 23:43:17,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:43:17,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4740 states and 6173 transitions. [2021-11-12 23:43:17,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-12 23:43:17,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:17,072 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:43:17,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-12 23:43:17,073 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:17,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:17,073 INFO L85 PathProgramCache]: Analyzing trace with hash -509506290, now seen corresponding path program 1 times [2021-11-12 23:43:17,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:43:17,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379872924] [2021-11-12 23:43:17,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:17,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:43:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:44:08,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:44:08,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379872924] [2021-11-12 23:44:08,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379872924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 23:44:08,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779374027] [2021-11-12 23:44:08,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:08,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:44:08,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:44:08,296 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:44:08,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_076e6124-b06f-4f65-b7ce-83ad45cdb8ed/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 23:44:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:08,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 171 conjunts are in the unsatisfiable core [2021-11-12 23:44:08,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:51:39,563 WARN L227 SmtUtils]: Spent 4.91m on a formula simplification. DAG size of input: 249 DAG size of output: 245 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)