./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-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_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/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_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/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_aafe7ea7-5590-4366-a391-28908ae344a8/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 16db63adfa8747ce86c67ae78be78e889eae71e4b07fbcb21a84ad0decbbdac7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:26:41,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:26:41,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:26:41,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:26:41,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:26:41,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:26:41,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:26:41,492 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:26:41,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:26:41,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:26:41,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:26:41,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:26:41,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:26:41,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:26:41,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:26:41,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:26:41,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:26:41,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:26:41,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:26:41,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:26:41,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:26:41,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:26:41,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:26:41,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:26:41,523 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:26:41,523 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:26:41,524 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:26:41,525 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:26:41,525 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:26:41,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:26:41,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:26:41,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:26:41,529 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:26:41,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:26:41,532 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:26:41,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:26:41,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:26:41,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:26:41,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:26:41,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:26:41,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:26:41,537 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 22:26:41,563 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:26:41,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:26:41,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:26:41,564 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:26:41,565 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:26:41,565 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:26:41,566 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:26:41,566 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:26:41,566 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:26:41,567 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:26:41,567 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:26:41,568 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:26:41,568 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:26:41,568 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:26:41,569 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:26:41,569 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:26:41,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:26:41,571 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:26:41,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:26:41,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:26:41,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:26:41,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:26:41,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:26:41,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:26:41,573 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:26:41,574 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:26:41,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:26:41,574 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:26:41,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:26:41,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:26:41,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:26:41,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:26:41,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:26:41,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:26:41,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:26:41,577 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:26:41,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:26:41,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:26:41,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:26:41,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:26:41,578 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_aafe7ea7-5590-4366-a391-28908ae344a8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16db63adfa8747ce86c67ae78be78e889eae71e4b07fbcb21a84ad0decbbdac7 [2021-11-12 22:26:41,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:26:41,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:26:41,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:26:41,834 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:26:41,835 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:26:41,836 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-12 22:26:41,934 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/data/d77823a78/0ca6f29e6cf8432d9d6983d0357891ad/FLAGdf503c267 [2021-11-12 22:26:42,481 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:26:42,482 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-12 22:26:42,494 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/data/d77823a78/0ca6f29e6cf8432d9d6983d0357891ad/FLAGdf503c267 [2021-11-12 22:26:42,773 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/data/d77823a78/0ca6f29e6cf8432d9d6983d0357891ad [2021-11-12 22:26:42,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:26:42,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:26:42,794 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:26:42,794 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:26:42,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:26:42,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:26:42" (1/1) ... [2021-11-12 22:26:42,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16a7691a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:42, skipping insertion in model container [2021-11-12 22:26:42,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:26:42" (1/1) ... [2021-11-12 22:26:42,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:26:42,877 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:26:43,215 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_aafe7ea7-5590-4366-a391-28908ae344a8/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2021-11-12 22:26:43,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:26:43,319 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:26:43,425 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_aafe7ea7-5590-4366-a391-28908ae344a8/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[12986,12999] [2021-11-12 22:26:43,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:26:43,516 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:26:43,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43 WrapperNode [2021-11-12 22:26:43,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:26:43,518 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:26:43,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:26:43,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:26:43,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,642 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:26:43,643 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:26:43,643 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:26:43,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:26:43,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,732 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:26:43,733 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:26:43,733 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:26:43,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:26:43,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (1/1) ... [2021-11-12 22:26:43,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:26:43,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:26:43,769 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:26:43,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:26:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 22:26:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:26:43,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:26:43,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:26:45,208 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:26:45,209 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 22:26:45,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:26:45 BoogieIcfgContainer [2021-11-12 22:26:45,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:26:45,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:26:45,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:26:45,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:26:45,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:26:42" (1/3) ... [2021-11-12 22:26:45,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f25124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:26:45, skipping insertion in model container [2021-11-12 22:26:45,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:26:43" (2/3) ... [2021-11-12 22:26:45,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f25124 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:26:45, skipping insertion in model container [2021-11-12 22:26:45,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:26:45" (3/3) ... [2021-11-12 22:26:45,224 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-11-12 22:26:45,233 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:26:45,234 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:26:45,280 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:26:45,288 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 22:26:45,288 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:26:45,309 INFO L276 IsEmpty]: Start isEmpty. Operand has 255 states, 253 states have (on average 1.6798418972332017) internal successors, (425), 254 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:45,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 22:26:45,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:45,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:45,324 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:45,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:45,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1325608003, now seen corresponding path program 1 times [2021-11-12 22:26:45,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:45,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005323218] [2021-11-12 22:26:45,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:45,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:45,847 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:45,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005323218] [2021-11-12 22:26:45,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005323218] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:45,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:45,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:26:45,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115233819] [2021-11-12 22:26:45,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:45,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:26:45,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:45,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:26:45,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:45,884 INFO L87 Difference]: Start difference. First operand has 255 states, 253 states have (on average 1.6798418972332017) internal successors, (425), 254 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 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 22:26:46,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:46,058 INFO L93 Difference]: Finished difference Result 420 states and 690 transitions. [2021-11-12 22:26:46,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:26:46,060 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 22:26:46,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:46,075 INFO L225 Difference]: With dead ends: 420 [2021-11-12 22:26:46,075 INFO L226 Difference]: Without dead ends: 325 [2021-11-12 22:26:46,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:46,082 INFO L933 BasicCegarLoop]: 503 mSDtfsCounter, 147 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.68ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:46,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 858 Invalid, 71 Unknown, 0 Unchecked, 8.68ms Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 105.58ms Time] [2021-11-12 22:26:46,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-11-12 22:26:46,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2021-11-12 22:26:46,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.5372670807453417) internal successors, (495), 322 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 495 transitions. [2021-11-12 22:26:46,188 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 495 transitions. Word has length 101 [2021-11-12 22:26:46,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:46,190 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 495 transitions. [2021-11-12 22:26:46,190 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 22:26:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 495 transitions. [2021-11-12 22:26:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 22:26:46,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:46,203 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:46,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 22:26:46,204 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:46,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:46,207 INFO L85 PathProgramCache]: Analyzing trace with hash 672364081, now seen corresponding path program 1 times [2021-11-12 22:26:46,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:46,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808562885] [2021-11-12 22:26:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:46,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:46,457 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:46,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808562885] [2021-11-12 22:26:46,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808562885] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:46,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:46,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:26:46,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507460464] [2021-11-12 22:26:46,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:46,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:26:46,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:46,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:26:46,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:46,461 INFO L87 Difference]: Start difference. First operand 323 states and 495 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:46,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:46,653 INFO L93 Difference]: Finished difference Result 571 states and 897 transitions. [2021-11-12 22:26:46,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:26:46,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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 103 [2021-11-12 22:26:46,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:46,663 INFO L225 Difference]: With dead ends: 571 [2021-11-12 22:26:46,663 INFO L226 Difference]: Without dead ends: 412 [2021-11-12 22:26:46,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:46,672 INFO L933 BasicCegarLoop]: 346 mSDtfsCounter, 136 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 131.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.42ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 153.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:46,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 655 Invalid, 75 Unknown, 0 Unchecked, 4.42ms Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 153.96ms Time] [2021-11-12 22:26:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-12 22:26:46,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 410. [2021-11-12 22:26:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.547677261613692) internal successors, (633), 409 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:46,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 633 transitions. [2021-11-12 22:26:46,715 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 633 transitions. Word has length 103 [2021-11-12 22:26:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:46,717 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 633 transitions. [2021-11-12 22:26:46,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 633 transitions. [2021-11-12 22:26:46,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-12 22:26:46,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:46,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:46,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 22:26:46,726 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:46,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:46,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1922675800, now seen corresponding path program 1 times [2021-11-12 22:26:46,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:46,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609587121] [2021-11-12 22:26:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:46,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:46,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:46,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609587121] [2021-11-12 22:26:46,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609587121] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:46,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:46,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:26:46,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405611387] [2021-11-12 22:26:46,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:46,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:26:46,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:46,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:26:46,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:46,934 INFO L87 Difference]: Start difference. First operand 410 states and 633 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:47,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:47,066 INFO L93 Difference]: Finished difference Result 849 states and 1344 transitions. [2021-11-12 22:26:47,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:26:47,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-11-12 22:26:47,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:47,074 INFO L225 Difference]: With dead ends: 849 [2021-11-12 22:26:47,074 INFO L226 Difference]: Without dead ends: 604 [2021-11-12 22:26:47,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:47,087 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 136 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.29ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:47,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 745 Invalid, 67 Unknown, 0 Unchecked, 3.29ms Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 95.94ms Time] [2021-11-12 22:26:47,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-12 22:26:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 602. [2021-11-12 22:26:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 1.5707154742096505) internal successors, (944), 601 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:47,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 944 transitions. [2021-11-12 22:26:47,124 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 944 transitions. Word has length 106 [2021-11-12 22:26:47,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:47,125 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 944 transitions. [2021-11-12 22:26:47,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:47,126 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 944 transitions. [2021-11-12 22:26:47,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 22:26:47,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:47,133 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:47,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 22:26:47,134 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:47,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:47,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1327867533, now seen corresponding path program 1 times [2021-11-12 22:26:47,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:47,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563403867] [2021-11-12 22:26:47,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:47,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:47,270 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:47,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563403867] [2021-11-12 22:26:47,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563403867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:47,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:47,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:26:47,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181800082] [2021-11-12 22:26:47,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:47,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:26:47,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:47,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:26:47,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:47,273 INFO L87 Difference]: Start difference. First operand 602 states and 944 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:47,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:47,448 INFO L93 Difference]: Finished difference Result 1302 states and 2074 transitions. [2021-11-12 22:26:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:26:47,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 108 [2021-11-12 22:26:47,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:47,457 INFO L225 Difference]: With dead ends: 1302 [2021-11-12 22:26:47,457 INFO L226 Difference]: Without dead ends: 865 [2021-11-12 22:26:47,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:47,459 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 135 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 89.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.99ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 107.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:47,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 671 Invalid, 63 Unknown, 0 Unchecked, 2.99ms Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 107.46ms Time] [2021-11-12 22:26:47,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-11-12 22:26:47,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2021-11-12 22:26:47,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 1.5812064965197217) internal successors, (1363), 862 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:47,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1363 transitions. [2021-11-12 22:26:47,501 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1363 transitions. Word has length 108 [2021-11-12 22:26:47,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:47,502 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1363 transitions. [2021-11-12 22:26:47,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:47,502 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1363 transitions. [2021-11-12 22:26:47,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 22:26:47,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:47,504 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:47,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 22:26:47,504 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:47,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:47,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1064008304, now seen corresponding path program 1 times [2021-11-12 22:26:47,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:47,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049162088] [2021-11-12 22:26:47,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:47,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:47,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:47,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049162088] [2021-11-12 22:26:47,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049162088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:47,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:47,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:26:47,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095451477] [2021-11-12 22:26:47,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:47,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:26:47,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:47,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:26:47,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:47,578 INFO L87 Difference]: Start difference. First operand 863 states and 1363 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:47,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:47,732 INFO L93 Difference]: Finished difference Result 2070 states and 3318 transitions. [2021-11-12 22:26:47,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:26:47,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 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 111 [2021-11-12 22:26:47,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:47,742 INFO L225 Difference]: With dead ends: 2070 [2021-11-12 22:26:47,742 INFO L226 Difference]: Without dead ends: 1390 [2021-11-12 22:26:47,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:47,744 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 130 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.33ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 85.07ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:47,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 718 Invalid, 67 Unknown, 0 Unchecked, 2.33ms Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 85.07ms Time] [2021-11-12 22:26:47,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-11-12 22:26:47,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1388. [2021-11-12 22:26:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 1.592645998558039) internal successors, (2209), 1387 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:47,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2209 transitions. [2021-11-12 22:26:47,821 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2209 transitions. Word has length 111 [2021-11-12 22:26:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:47,822 INFO L470 AbstractCegarLoop]: Abstraction has 1388 states and 2209 transitions. [2021-11-12 22:26:47,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:47,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2209 transitions. [2021-11-12 22:26:47,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 22:26:47,824 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:47,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:47,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 22:26:47,824 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:47,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:47,825 INFO L85 PathProgramCache]: Analyzing trace with hash -877927785, now seen corresponding path program 1 times [2021-11-12 22:26:47,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:47,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450941852] [2021-11-12 22:26:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:47,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:47,913 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:47,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450941852] [2021-11-12 22:26:47,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450941852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:47,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:47,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:26:47,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75861576] [2021-11-12 22:26:47,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:47,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:26:47,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:47,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:26:47,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:47,915 INFO L87 Difference]: Start difference. First operand 1388 states and 2209 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 22:26:48,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:48,109 INFO L93 Difference]: Finished difference Result 3291 states and 5280 transitions. [2021-11-12 22:26:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:26:48,110 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 22:26:48,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:48,122 INFO L225 Difference]: With dead ends: 3291 [2021-11-12 22:26:48,123 INFO L226 Difference]: Without dead ends: 2086 [2021-11-12 22:26:48,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:48,128 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 129 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 71.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.24ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 88.91ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:48,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 673 Invalid, 63 Unknown, 0 Unchecked, 2.24ms Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 88.91ms Time] [2021-11-12 22:26:48,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-11-12 22:26:48,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 2084. [2021-11-12 22:26:48,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 1.5962554008641383) internal successors, (3325), 2083 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:48,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 3325 transitions. [2021-11-12 22:26:48,323 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 3325 transitions. Word has length 113 [2021-11-12 22:26:48,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:48,323 INFO L470 AbstractCegarLoop]: Abstraction has 2084 states and 3325 transitions. [2021-11-12 22:26:48,323 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 22:26:48,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 3325 transitions. [2021-11-12 22:26:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-12 22:26:48,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:48,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:48,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 22:26:48,326 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:48,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:48,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2114041290, now seen corresponding path program 1 times [2021-11-12 22:26:48,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:48,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619441887] [2021-11-12 22:26:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:48,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:48,401 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:48,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619441887] [2021-11-12 22:26:48,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619441887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:48,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:48,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:26:48,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864569308] [2021-11-12 22:26:48,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:48,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:26:48,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:48,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:26:48,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:48,403 INFO L87 Difference]: Start difference. First operand 2084 states and 3325 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 22:26:48,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:48,743 INFO L93 Difference]: Finished difference Result 5391 states and 8664 transitions. [2021-11-12 22:26:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:26:48,744 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 22:26:48,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:48,765 INFO L225 Difference]: With dead ends: 5391 [2021-11-12 22:26:48,766 INFO L226 Difference]: Without dead ends: 3508 [2021-11-12 22:26:48,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:48,774 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 124 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.91ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.20ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:48,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 691 Invalid, 67 Unknown, 0 Unchecked, 2.91ms Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 98.20ms Time] [2021-11-12 22:26:48,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2021-11-12 22:26:49,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 3506. [2021-11-12 22:26:49,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 1.5982881597717546) internal successors, (5602), 3505 states have internal predecessors, (5602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 5602 transitions. [2021-11-12 22:26:49,065 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 5602 transitions. Word has length 116 [2021-11-12 22:26:49,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:49,066 INFO L470 AbstractCegarLoop]: Abstraction has 3506 states and 5602 transitions. [2021-11-12 22:26:49,066 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 22:26:49,066 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 5602 transitions. [2021-11-12 22:26:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 22:26:49,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:49,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:49,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 22:26:49,068 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:49,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:49,070 INFO L85 PathProgramCache]: Analyzing trace with hash 2139714335, now seen corresponding path program 1 times [2021-11-12 22:26:49,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:49,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641532478] [2021-11-12 22:26:49,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:49,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:49,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:49,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641532478] [2021-11-12 22:26:49,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641532478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:49,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:49,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:26:49,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686109784] [2021-11-12 22:26:49,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:49,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:26:49,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:49,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:26:49,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:49,155 INFO L87 Difference]: Start difference. First operand 3506 states and 5602 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:49,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:49,581 INFO L93 Difference]: Finished difference Result 8712 states and 13974 transitions. [2021-11-12 22:26:49,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:26:49,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 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 118 [2021-11-12 22:26:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:49,615 INFO L225 Difference]: With dead ends: 8712 [2021-11-12 22:26:49,615 INFO L226 Difference]: Without dead ends: 5407 [2021-11-12 22:26:49,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:26:49,623 INFO L933 BasicCegarLoop]: 357 mSDtfsCounter, 123 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.18ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 79.10ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:49,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 675 Invalid, 63 Unknown, 0 Unchecked, 2.18ms Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 79.10ms Time] [2021-11-12 22:26:49,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5407 states. [2021-11-12 22:26:49,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5407 to 5405. [2021-11-12 22:26:50,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5405 states, 5404 states have (on average 1.5978904515173946) internal successors, (8635), 5404 states have internal predecessors, (8635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5405 states to 5405 states and 8635 transitions. [2021-11-12 22:26:50,033 INFO L78 Accepts]: Start accepts. Automaton has 5405 states and 8635 transitions. Word has length 118 [2021-11-12 22:26:50,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:50,033 INFO L470 AbstractCegarLoop]: Abstraction has 5405 states and 8635 transitions. [2021-11-12 22:26:50,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:50,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5405 states and 8635 transitions. [2021-11-12 22:26:50,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 22:26:50,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:50,037 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:50,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 22:26:50,037 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:50,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:50,038 INFO L85 PathProgramCache]: Analyzing trace with hash 949471684, now seen corresponding path program 1 times [2021-11-12 22:26:50,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:50,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466853449] [2021-11-12 22:26:50,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:50,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:50,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:50,153 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:50,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466853449] [2021-11-12 22:26:50,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466853449] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:50,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:50,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:26:50,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310207147] [2021-11-12 22:26:50,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:50,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:26:50,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:50,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:26:50,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:26:50,156 INFO L87 Difference]: Start difference. First operand 5405 states and 8635 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:51,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:51,223 INFO L93 Difference]: Finished difference Result 13488 states and 21561 transitions. [2021-11-12 22:26:51,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:26:51,224 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 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 121 [2021-11-12 22:26:51,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:51,276 INFO L225 Difference]: With dead ends: 13488 [2021-11-12 22:26:51,277 INFO L226 Difference]: Without dead ends: 8302 [2021-11-12 22:26:51,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:26:51,290 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 1040 mSDsluCounter, 2863 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 331.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 3105 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.11ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 429.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:51,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1040 Valid, 3105 Invalid, 387 Unknown, 0 Unchecked, 13.11ms Time], IncrementalHoareTripleChecker [7 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 429.86ms Time] [2021-11-12 22:26:51,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8302 states. [2021-11-12 22:26:51,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8302 to 8288. [2021-11-12 22:26:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5888741402196211) internal successors, (13167), 8287 states have internal predecessors, (13167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:51,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13167 transitions. [2021-11-12 22:26:51,942 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13167 transitions. Word has length 121 [2021-11-12 22:26:51,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:51,942 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13167 transitions. [2021-11-12 22:26:51,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13167 transitions. [2021-11-12 22:26:51,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-12 22:26:51,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:51,945 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:51,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 22:26:51,946 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:51,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:51,947 INFO L85 PathProgramCache]: Analyzing trace with hash -698210882, now seen corresponding path program 1 times [2021-11-12 22:26:51,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:51,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612216427] [2021-11-12 22:26:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:51,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:52,045 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:52,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612216427] [2021-11-12 22:26:52,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612216427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:52,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:52,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:26:52,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965656285] [2021-11-12 22:26:52,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:52,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:26:52,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:52,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:26:52,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:26:52,048 INFO L87 Difference]: Start difference. First operand 8288 states and 13167 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:52,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:52,667 INFO L93 Difference]: Finished difference Result 16359 states and 26017 transitions. [2021-11-12 22:26:52,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:26:52,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 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 122 [2021-11-12 22:26:52,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:52,698 INFO L225 Difference]: With dead ends: 16359 [2021-11-12 22:26:52,698 INFO L226 Difference]: Without dead ends: 8290 [2021-11-12 22:26:52,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:26:52,713 INFO L933 BasicCegarLoop]: 347 mSDtfsCounter, 255 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 108.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.79ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.43ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:52,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 1006 Invalid, 119 Unknown, 0 Unchecked, 3.79ms Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 127.43ms Time] [2021-11-12 22:26:52,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-12 22:26:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2021-11-12 22:26:53,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5847713285869434) internal successors, (13133), 8287 states have internal predecessors, (13133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:53,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13133 transitions. [2021-11-12 22:26:53,342 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13133 transitions. Word has length 122 [2021-11-12 22:26:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:53,342 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13133 transitions. [2021-11-12 22:26:53,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13133 transitions. [2021-11-12 22:26:53,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-12 22:26:53,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:53,345 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:53,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 22:26:53,346 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:53,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:53,346 INFO L85 PathProgramCache]: Analyzing trace with hash -232204853, now seen corresponding path program 1 times [2021-11-12 22:26:53,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:53,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089198296] [2021-11-12 22:26:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:53,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:53,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:53,432 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:53,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089198296] [2021-11-12 22:26:53,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089198296] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:53,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:53,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:26:53,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863622247] [2021-11-12 22:26:53,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:53,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:26:53,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:53,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:26:53,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:26:53,435 INFO L87 Difference]: Start difference. First operand 8288 states and 13133 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:54,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:54,097 INFO L93 Difference]: Finished difference Result 16359 states and 25949 transitions. [2021-11-12 22:26:54,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:26:54,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 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 123 [2021-11-12 22:26:54,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:54,122 INFO L225 Difference]: With dead ends: 16359 [2021-11-12 22:26:54,122 INFO L226 Difference]: Without dead ends: 8290 [2021-11-12 22:26:54,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:26:54,137 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 263 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.09ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 125.09ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:54,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 1012 Invalid, 120 Unknown, 0 Unchecked, 11.09ms Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 125.09ms Time] [2021-11-12 22:26:54,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-12 22:26:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2021-11-12 22:26:54,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5806685169542658) internal successors, (13099), 8287 states have internal predecessors, (13099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13099 transitions. [2021-11-12 22:26:54,716 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13099 transitions. Word has length 123 [2021-11-12 22:26:54,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:54,717 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13099 transitions. [2021-11-12 22:26:54,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:54,718 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13099 transitions. [2021-11-12 22:26:54,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 22:26:54,719 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:54,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:54,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-12 22:26:54,720 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:54,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:54,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1333638181, now seen corresponding path program 1 times [2021-11-12 22:26:54,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:54,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62518314] [2021-11-12 22:26:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:54,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:54,800 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:54,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62518314] [2021-11-12 22:26:54,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62518314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:54,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:54,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:26:54,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468641331] [2021-11-12 22:26:54,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:54,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:26:54,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:54,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:26:54,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:26:54,803 INFO L87 Difference]: Start difference. First operand 8288 states and 13099 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:55,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:55,369 INFO L93 Difference]: Finished difference Result 16359 states and 25881 transitions. [2021-11-12 22:26:55,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:26:55,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 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 124 [2021-11-12 22:26:55,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:55,391 INFO L225 Difference]: With dead ends: 16359 [2021-11-12 22:26:55,391 INFO L226 Difference]: Without dead ends: 8290 [2021-11-12 22:26:55,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:26:55,404 INFO L933 BasicCegarLoop]: 352 mSDtfsCounter, 261 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 101.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.65ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 121.77ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:55,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 1015 Invalid, 119 Unknown, 0 Unchecked, 3.65ms Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 121.77ms Time] [2021-11-12 22:26:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-12 22:26:55,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2021-11-12 22:26:55,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.576565705321588) internal successors, (13065), 8287 states have internal predecessors, (13065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:55,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13065 transitions. [2021-11-12 22:26:55,880 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13065 transitions. Word has length 124 [2021-11-12 22:26:55,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:55,880 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13065 transitions. [2021-11-12 22:26:55,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:55,881 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13065 transitions. [2021-11-12 22:26:55,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-12 22:26:55,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:55,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:55,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-12 22:26:55,883 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:55,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:55,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1660277294, now seen corresponding path program 1 times [2021-11-12 22:26:55,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:55,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363000222] [2021-11-12 22:26:55,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:55,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:55,950 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:55,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363000222] [2021-11-12 22:26:55,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363000222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:55,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:55,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 22:26:55,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575121991] [2021-11-12 22:26:55,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:55,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:26:55,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:55,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:26:55,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:26:55,952 INFO L87 Difference]: Start difference. First operand 8288 states and 13065 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:56,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:56,406 INFO L93 Difference]: Finished difference Result 16359 states and 25813 transitions. [2021-11-12 22:26:56,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:26:56,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 125 [2021-11-12 22:26:56,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:56,428 INFO L225 Difference]: With dead ends: 16359 [2021-11-12 22:26:56,429 INFO L226 Difference]: Without dead ends: 8290 [2021-11-12 22:26:56,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:26:56,443 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 259 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.14ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:56,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 1018 Invalid, 118 Unknown, 0 Unchecked, 3.14ms Time], IncrementalHoareTripleChecker [0 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 115.95ms Time] [2021-11-12 22:26:56,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-12 22:26:56,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2021-11-12 22:26:56,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5724628936889102) internal successors, (13031), 8287 states have internal predecessors, (13031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13031 transitions. [2021-11-12 22:26:56,954 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13031 transitions. Word has length 125 [2021-11-12 22:26:56,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:56,955 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13031 transitions. [2021-11-12 22:26:56,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:56,956 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13031 transitions. [2021-11-12 22:26:56,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 22:26:56,958 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:56,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:56,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-12 22:26:56,958 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:56,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:56,959 INFO L85 PathProgramCache]: Analyzing trace with hash 684049603, now seen corresponding path program 1 times [2021-11-12 22:26:56,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:56,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343101058] [2021-11-12 22:26:56,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:56,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:57,156 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:57,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343101058] [2021-11-12 22:26:57,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343101058] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:57,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:57,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:26:57,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147140512] [2021-11-12 22:26:57,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:57,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:26:57,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:57,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:26:57,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:26:57,159 INFO L87 Difference]: Start difference. First operand 8288 states and 13031 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:58,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:58,011 INFO L93 Difference]: Finished difference Result 16359 states and 25745 transitions. [2021-11-12 22:26:58,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:26:58,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 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 127 [2021-11-12 22:26:58,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:58,033 INFO L225 Difference]: With dead ends: 16359 [2021-11-12 22:26:58,034 INFO L226 Difference]: Without dead ends: 8290 [2021-11-12 22:26:58,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:26:58,048 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 232 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 208.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.00ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 246.13ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:58,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 1640 Invalid, 238 Unknown, 0 Unchecked, 6.00ms Time], IncrementalHoareTripleChecker [1 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 246.13ms Time] [2021-11-12 22:26:58,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8290 states. [2021-11-12 22:26:58,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8290 to 8288. [2021-11-12 22:26:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8288 states, 8287 states have (on average 1.5705321588029444) internal successors, (13015), 8287 states have internal predecessors, (13015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8288 states to 8288 states and 13015 transitions. [2021-11-12 22:26:58,707 INFO L78 Accepts]: Start accepts. Automaton has 8288 states and 13015 transitions. Word has length 127 [2021-11-12 22:26:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:26:58,708 INFO L470 AbstractCegarLoop]: Abstraction has 8288 states and 13015 transitions. [2021-11-12 22:26:58,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:26:58,708 INFO L276 IsEmpty]: Start isEmpty. Operand 8288 states and 13015 transitions. [2021-11-12 22:26:58,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-12 22:26:58,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:26:58,710 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:26:58,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-12 22:26:58,710 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:26:58,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:26:58,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1148518135, now seen corresponding path program 1 times [2021-11-12 22:26:58,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:26:58,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70716389] [2021-11-12 22:26:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:26:58,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:26:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:26:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:26:58,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:26:58,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70716389] [2021-11-12 22:26:58,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70716389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:26:58,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:26:58,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:26:58,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122571446] [2021-11-12 22:26:58,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:26:58,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:26:58,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:26:58,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:26:58,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:26:58,878 INFO L87 Difference]: Start difference. First operand 8288 states and 13015 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 22:26:59,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:26:59,796 INFO L93 Difference]: Finished difference Result 20553 states and 32209 transitions. [2021-11-12 22:26:59,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:26:59,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 130 [2021-11-12 22:26:59,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:26:59,825 INFO L225 Difference]: With dead ends: 20553 [2021-11-12 22:26:59,825 INFO L226 Difference]: Without dead ends: 12484 [2021-11-12 22:26:59,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:26:59,843 INFO L933 BasicCegarLoop]: 353 mSDtfsCounter, 438 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 158.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.77ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 186.81ms IncrementalHoareTripleChecker+Time [2021-11-12 22:26:59,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 1346 Invalid, 179 Unknown, 0 Unchecked, 4.77ms Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 186.81ms Time] [2021-11-12 22:26:59,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2021-11-12 22:27:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 12482. [2021-11-12 22:27:00,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12482 states, 12481 states have (on average 1.5613332265042865) internal successors, (19487), 12481 states have internal predecessors, (19487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:27:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12482 states to 12482 states and 19487 transitions. [2021-11-12 22:27:00,737 INFO L78 Accepts]: Start accepts. Automaton has 12482 states and 19487 transitions. Word has length 130 [2021-11-12 22:27:00,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:00,737 INFO L470 AbstractCegarLoop]: Abstraction has 12482 states and 19487 transitions. [2021-11-12 22:27:00,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 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 22:27:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 12482 states and 19487 transitions. [2021-11-12 22:27:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-12 22:27:00,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:00,740 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:00,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-12 22:27:00,740 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:00,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1277687264, now seen corresponding path program 1 times [2021-11-12 22:27:00,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:27:00,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302099115] [2021-11-12 22:27:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:00,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:27:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:27:00,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:27:00,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302099115] [2021-11-12 22:27:00,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302099115] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:00,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:27:00,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-12 22:27:00,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908364762] [2021-11-12 22:27:00,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:00,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:27:00,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:27:00,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:27:00,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:27:00,926 INFO L87 Difference]: Start difference. First operand 12482 states and 19487 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:27:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:02,006 INFO L93 Difference]: Finished difference Result 15360 states and 23868 transitions. [2021-11-12 22:27:02,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:27:02,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 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 131 [2021-11-12 22:27:02,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:02,033 INFO L225 Difference]: With dead ends: 15360 [2021-11-12 22:27:02,033 INFO L226 Difference]: Without dead ends: 15358 [2021-11-12 22:27:02,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:27:02,043 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 369 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 2151 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.33ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 252.34ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:02,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 2151 Invalid, 246 Unknown, 0 Unchecked, 6.33ms Time], IncrementalHoareTripleChecker [2 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 252.34ms Time] [2021-11-12 22:27:02,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15358 states. [2021-11-12 22:27:02,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15358 to 12496. [2021-11-12 22:27:02,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12496 states, 12495 states have (on average 1.5591036414565826) internal successors, (19481), 12495 states have internal predecessors, (19481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:27:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12496 states to 12496 states and 19481 transitions. [2021-11-12 22:27:02,900 INFO L78 Accepts]: Start accepts. Automaton has 12496 states and 19481 transitions. Word has length 131 [2021-11-12 22:27:02,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:02,901 INFO L470 AbstractCegarLoop]: Abstraction has 12496 states and 19481 transitions. [2021-11-12 22:27:02,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:27:02,901 INFO L276 IsEmpty]: Start isEmpty. Operand 12496 states and 19481 transitions. [2021-11-12 22:27:02,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-12 22:27:02,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:02,904 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:02,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-12 22:27:02,904 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:02,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1212519615, now seen corresponding path program 1 times [2021-11-12 22:27:02,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:27:02,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902327619] [2021-11-12 22:27:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:02,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:27:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:27:03,518 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:27:03,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902327619] [2021-11-12 22:27:03,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902327619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:27:03,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276276893] [2021-11-12 22:27:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:03,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:27:03,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:27:03,520 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:27:03,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-12 22:27:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:03,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:27:03,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:04,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:27:04,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:27:04,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276276893] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:04,717 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:27:04,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [13] total 16 [2021-11-12 22:27:04,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707434664] [2021-11-12 22:27:04,718 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:04,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:27:04,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:27:04,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:27:04,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:27:04,720 INFO L87 Difference]: Start difference. First operand 12496 states and 19481 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:27:06,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:06,377 INFO L93 Difference]: Finished difference Result 36774 states and 57377 transitions. [2021-11-12 22:27:06,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:27:06,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 139 [2021-11-12 22:27:06,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:06,414 INFO L225 Difference]: With dead ends: 36774 [2021-11-12 22:27:06,414 INFO L226 Difference]: Without dead ends: 24495 [2021-11-12 22:27:06,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:27:06,436 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 1417 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1417 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.10ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 100.83ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:06,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1417 Valid, 745 Invalid, 72 Unknown, 0 Unchecked, 4.10ms Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 100.83ms Time] [2021-11-12 22:27:06,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24495 states. [2021-11-12 22:27:07,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24495 to 24493. [2021-11-12 22:27:08,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24493 states, 24492 states have (on average 1.555528335783113) internal successors, (38098), 24492 states have internal predecessors, (38098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:27:08,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24493 states to 24493 states and 38098 transitions. [2021-11-12 22:27:08,040 INFO L78 Accepts]: Start accepts. Automaton has 24493 states and 38098 transitions. Word has length 139 [2021-11-12 22:27:08,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:08,040 INFO L470 AbstractCegarLoop]: Abstraction has 24493 states and 38098 transitions. [2021-11-12 22:27:08,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:27:08,040 INFO L276 IsEmpty]: Start isEmpty. Operand 24493 states and 38098 transitions. [2021-11-12 22:27:08,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-12 22:27:08,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:08,043 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:08,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:27:08,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-12 22:27:08,258 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:08,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:08,259 INFO L85 PathProgramCache]: Analyzing trace with hash 93144951, now seen corresponding path program 1 times [2021-11-12 22:27:08,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:27:08,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809460182] [2021-11-12 22:27:08,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:08,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:27:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-12 22:27:08,301 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:27:08,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809460182] [2021-11-12 22:27:08,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809460182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:08,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:27:08,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:27:08,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817184840] [2021-11-12 22:27:08,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:08,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:27:08,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:27:08,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:27:08,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:27:08,304 INFO L87 Difference]: Start difference. First operand 24493 states and 38098 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:27:11,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:11,134 INFO L93 Difference]: Finished difference Result 73403 states and 114171 transitions. [2021-11-12 22:27:11,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:27:11,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 141 [2021-11-12 22:27:11,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:11,212 INFO L225 Difference]: With dead ends: 73403 [2021-11-12 22:27:11,212 INFO L226 Difference]: Without dead ends: 48949 [2021-11-12 22:27:11,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:27:11,233 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 318 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.06ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 111.70ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:11,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 688 Invalid, 68 Unknown, 0 Unchecked, 2.06ms Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 111.70ms Time] [2021-11-12 22:27:11,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48949 states. [2021-11-12 22:27:13,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48949 to 24500. [2021-11-12 22:27:13,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24500 states, 24499 states have (on average 1.5554512429078737) internal successors, (38107), 24499 states have internal predecessors, (38107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:27:13,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24500 states to 24500 states and 38107 transitions. [2021-11-12 22:27:13,175 INFO L78 Accepts]: Start accepts. Automaton has 24500 states and 38107 transitions. Word has length 141 [2021-11-12 22:27:13,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:13,175 INFO L470 AbstractCegarLoop]: Abstraction has 24500 states and 38107 transitions. [2021-11-12 22:27:13,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:27:13,176 INFO L276 IsEmpty]: Start isEmpty. Operand 24500 states and 38107 transitions. [2021-11-12 22:27:13,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-12 22:27:13,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:13,179 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:13,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-12 22:27:13,179 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:13,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:13,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1611567089, now seen corresponding path program 1 times [2021-11-12 22:27:13,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:27:13,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546445816] [2021-11-12 22:27:13,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:13,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:27:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-12 22:27:13,267 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:27:13,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546445816] [2021-11-12 22:27:13,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546445816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:13,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:27:13,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 22:27:13,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060898777] [2021-11-12 22:27:13,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:13,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:27:13,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:27:13,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:27:13,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:27:13,270 INFO L87 Difference]: Start difference. First operand 24500 states and 38107 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:27:16,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:16,608 INFO L93 Difference]: Finished difference Result 71871 states and 111866 transitions. [2021-11-12 22:27:16,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:27:16,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 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 141 [2021-11-12 22:27:16,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:16,697 INFO L225 Difference]: With dead ends: 71871 [2021-11-12 22:27:16,697 INFO L226 Difference]: Without dead ends: 47466 [2021-11-12 22:27:16,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:27:16,727 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 246 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.81ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 137.92ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:16,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 979 Invalid, 99 Unknown, 0 Unchecked, 2.81ms Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 137.92ms Time] [2021-11-12 22:27:16,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47466 states. [2021-11-12 22:27:20,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47466 to 47464. [2021-11-12 22:27:20,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47464 states, 47463 states have (on average 1.5491646124349494) internal successors, (73528), 47463 states have internal predecessors, (73528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:27:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47464 states to 47464 states and 73528 transitions. [2021-11-12 22:27:20,276 INFO L78 Accepts]: Start accepts. Automaton has 47464 states and 73528 transitions. Word has length 141 [2021-11-12 22:27:20,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:27:20,276 INFO L470 AbstractCegarLoop]: Abstraction has 47464 states and 73528 transitions. [2021-11-12 22:27:20,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:27:20,276 INFO L276 IsEmpty]: Start isEmpty. Operand 47464 states and 73528 transitions. [2021-11-12 22:27:20,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 22:27:20,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:27:20,280 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:27:20,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-12 22:27:20,280 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:27:20,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:27:20,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2143711910, now seen corresponding path program 1 times [2021-11-12 22:27:20,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 22:27:20,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666850327] [2021-11-12 22:27:20,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:20,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 22:27:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:27:20,822 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 22:27:20,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666850327] [2021-11-12 22:27:20,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666850327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-12 22:27:20,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620218877] [2021-11-12 22:27:20,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:27:20,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:27:20,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:27:20,824 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:27:20,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aafe7ea7-5590-4366-a391-28908ae344a8/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-12 22:27:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:27:21,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:27:21,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:27:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:27:21,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:27:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:27:22,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620218877] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:27:22,033 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:27:22,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [13] total 16 [2021-11-12 22:27:22,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277091217] [2021-11-12 22:27:22,034 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:27:22,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 22:27:22,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 22:27:22,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 22:27:22,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:27:22,036 INFO L87 Difference]: Start difference. First operand 47464 states and 73528 transitions. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:27:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:27:29,769 INFO L93 Difference]: Finished difference Result 140708 states and 218042 transitions. [2021-11-12 22:27:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:27:29,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 4 states have internal predecessors, (163), 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 142 [2021-11-12 22:27:29,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:27:29,959 INFO L225 Difference]: With dead ends: 140708 [2021-11-12 22:27:29,960 INFO L226 Difference]: Without dead ends: 93354 [2021-11-12 22:27:30,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-11-12 22:27:30,193 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 1234 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.02ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 114.21ms IncrementalHoareTripleChecker+Time [2021-11-12 22:27:30,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1234 Valid, 722 Invalid, 82 Unknown, 0 Unchecked, 5.02ms Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 114.21ms Time] [2021-11-12 22:27:30,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93354 states.