./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8334f047-ee91-43f4-9cec-7f3a63582908/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8334f047-ee91-43f4-9cec-7f3a63582908/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8334f047-ee91-43f4-9cec-7f3a63582908/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8334f047-ee91-43f4-9cec-7f3a63582908/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8334f047-ee91-43f4-9cec-7f3a63582908/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8334f047-ee91-43f4-9cec-7f3a63582908/bin/utaipan-UUZaoUuFF8 --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 d09ea01cef1d93b0c86c8a3dadfd601718ca81915e873154848504beefeee43f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 00:53:36,379 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 00:53:36,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 00:53:36,427 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 00:53:36,428 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 00:53:36,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 00:53:36,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 00:53:36,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 00:53:36,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 00:53:36,448 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 00:53:36,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 00:53:36,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 00:53:36,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 00:53:36,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 00:53:36,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 00:53:36,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 00:53:36,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 00:53:36,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 00:53:36,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 00:53:36,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 00:53:36,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 00:53:36,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 00:53:36,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 00:53:36,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 00:53:36,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 00:53:36,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 00:53:36,491 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 00:53:36,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 00:53:36,493 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 00:53:36,495 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 00:53:36,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 00:53:36,496 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 00:53:36,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 00:53:36,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 00:53:36,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 00:53:36,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 00:53:36,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 00:53:36,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 00:53:36,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 00:53:36,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 00:53:36,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 00:53:36,505 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8334f047-ee91-43f4-9cec-7f3a63582908/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 00:53:36,550 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 00:53:36,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 00:53:36,551 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 00:53:36,552 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 00:53:36,552 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 00:53:36,552 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 00:53:36,552 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 00:53:36,552 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 00:53:36,553 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 00:53:36,553 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 00:53:36,554 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 00:53:36,554 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 00:53:36,554 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 00:53:36,554 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 00:53:36,555 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 00:53:36,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 00:53:36,555 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 00:53:36,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 00:53:36,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 00:53:36,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 00:53:36,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 00:53:36,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 00:53:36,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 00:53:36,557 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 00:53:36,557 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 00:53:36,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 00:53:36,557 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 00:53:36,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 00:53:36,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 00:53:36,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 00:53:36,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:36,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 00:53:36,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 00:53:36,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 00:53:36,564 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 00:53:36,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 00:53:36,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 00:53:36,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 00:53:36,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 00:53:36,565 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_8334f047-ee91-43f4-9cec-7f3a63582908/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8334f047-ee91-43f4-9cec-7f3a63582908/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d09ea01cef1d93b0c86c8a3dadfd601718ca81915e873154848504beefeee43f [2021-11-07 00:53:36,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 00:53:36,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 00:53:36,865 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 00:53:36,867 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 00:53:36,868 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 00:53:36,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8334f047-ee91-43f4-9cec-7f3a63582908/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-07 00:53:36,970 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8334f047-ee91-43f4-9cec-7f3a63582908/bin/utaipan-UUZaoUuFF8/data/435ec897c/4aa168dea52b43c0bb13021de893b6c9/FLAG3957b9b47 [2021-11-07 00:53:37,505 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 00:53:37,505 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8334f047-ee91-43f4-9cec-7f3a63582908/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-07 00:53:37,520 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8334f047-ee91-43f4-9cec-7f3a63582908/bin/utaipan-UUZaoUuFF8/data/435ec897c/4aa168dea52b43c0bb13021de893b6c9/FLAG3957b9b47 [2021-11-07 00:53:37,796 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8334f047-ee91-43f4-9cec-7f3a63582908/bin/utaipan-UUZaoUuFF8/data/435ec897c/4aa168dea52b43c0bb13021de893b6c9 [2021-11-07 00:53:37,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 00:53:37,798 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 00:53:37,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:37,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 00:53:37,806 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 00:53:37,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:37" (1/1) ... [2021-11-07 00:53:37,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48aecc40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:37, skipping insertion in model container [2021-11-07 00:53:37,809 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:53:37" (1/1) ... [2021-11-07 00:53:37,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 00:53:37,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 00:53:38,170 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_8334f047-ee91-43f4-9cec-7f3a63582908/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[11680,11693] [2021-11-07 00:53:38,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:38,288 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 00:53:38,418 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_8334f047-ee91-43f4-9cec-7f3a63582908/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[11680,11693] [2021-11-07 00:53:38,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 00:53:38,492 INFO L208 MainTranslator]: Completed translation [2021-11-07 00:53:38,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:38 WrapperNode [2021-11-07 00:53:38,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 00:53:38,493 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 00:53:38,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 00:53:38,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 00:53:38,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:38" (1/1) ... [2021-11-07 00:53:38,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:38" (1/1) ... [2021-11-07 00:53:38,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 00:53:38,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 00:53:38,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 00:53:38,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 00:53:38,588 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:38" (1/1) ... [2021-11-07 00:53:38,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:38" (1/1) ... [2021-11-07 00:53:38,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:38" (1/1) ... [2021-11-07 00:53:38,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:38" (1/1) ... [2021-11-07 00:53:38,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:38" (1/1) ... [2021-11-07 00:53:38,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:38" (1/1) ... [2021-11-07 00:53:38,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:38" (1/1) ... [2021-11-07 00:53:38,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 00:53:38,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 00:53:38,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 00:53:38,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 00:53:38,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:38" (1/1) ... [2021-11-07 00:53:38,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 00:53:38,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8334f047-ee91-43f4-9cec-7f3a63582908/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 00:53:38,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8334f047-ee91-43f4-9cec-7f3a63582908/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 00:53:38,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8334f047-ee91-43f4-9cec-7f3a63582908/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 00:53:38,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 00:53:38,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 00:53:38,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 00:53:38,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 00:53:40,534 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 00:53:40,535 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 00:53:40,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:53:40 BoogieIcfgContainer [2021-11-07 00:53:40,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 00:53:40,541 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 00:53:40,541 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 00:53:40,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 00:53:40,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:53:37" (1/3) ... [2021-11-07 00:53:40,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f8e9c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:53:40, skipping insertion in model container [2021-11-07 00:53:40,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:53:38" (2/3) ... [2021-11-07 00:53:40,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f8e9c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:53:40, skipping insertion in model container [2021-11-07 00:53:40,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:53:40" (3/3) ... [2021-11-07 00:53:40,550 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-07 00:53:40,556 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 00:53:40,557 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 00:53:40,621 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 00:53:40,630 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 [2021-11-07 00:53:40,630 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 00:53:40,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 166 states, 164 states have (on average 1.7804878048780488) internal successors, (292), 165 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:40,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-07 00:53:40,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:40,673 INFO L513 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] [2021-11-07 00:53:40,673 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:40,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:40,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1995004699, now seen corresponding path program 1 times [2021-11-07 00:53:40,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:53:40,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327845382] [2021-11-07 00:53:40,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:40,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:53:41,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:41,349 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:53:41,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327845382] [2021-11-07 00:53:41,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327845382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:41,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:41,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:53:41,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145148249] [2021-11-07 00:53:41,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:53:41,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:53:41,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:53:41,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:53:41,385 INFO L87 Difference]: Start difference. First operand has 166 states, 164 states have (on average 1.7804878048780488) internal successors, (292), 165 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:41,699 INFO L93 Difference]: Finished difference Result 254 states and 427 transitions. [2021-11-07 00:53:41,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:53:41,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-07 00:53:41,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:41,718 INFO L225 Difference]: With dead ends: 254 [2021-11-07 00:53:41,718 INFO L226 Difference]: Without dead ends: 164 [2021-11-07 00:53:41,723 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:53:41,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-07 00:53:41,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-11-07 00:53:41,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.2085889570552146) internal successors, (197), 163 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:41,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 197 transitions. [2021-11-07 00:53:41,776 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 197 transitions. Word has length 107 [2021-11-07 00:53:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:41,781 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 197 transitions. [2021-11-07 00:53:41,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 197 transitions. [2021-11-07 00:53:41,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 00:53:41,786 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:41,786 INFO L513 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] [2021-11-07 00:53:41,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 00:53:41,787 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:41,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:41,791 INFO L85 PathProgramCache]: Analyzing trace with hash 116070627, now seen corresponding path program 1 times [2021-11-07 00:53:41,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:53:41,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457445595] [2021-11-07 00:53:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:41,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:53:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:41,996 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:53:41,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457445595] [2021-11-07 00:53:41,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457445595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:41,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:41,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:53:41,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499757073] [2021-11-07 00:53:41,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:53:41,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:53:42,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:53:42,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:53:42,000 INFO L87 Difference]: Start difference. First operand 164 states and 197 transitions. Second operand has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 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) [2021-11-07 00:53:42,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:42,197 INFO L93 Difference]: Finished difference Result 254 states and 317 transitions. [2021-11-07 00:53:42,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:53:42,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 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 [2021-11-07 00:53:42,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:42,200 INFO L225 Difference]: With dead ends: 254 [2021-11-07 00:53:42,200 INFO L226 Difference]: Without dead ends: 164 [2021-11-07 00:53:42,201 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:53:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-07 00:53:42,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-11-07 00:53:42,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.196319018404908) internal successors, (195), 163 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 195 transitions. [2021-11-07 00:53:42,217 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 195 transitions. Word has length 108 [2021-11-07 00:53:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:42,218 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 195 transitions. [2021-11-07 00:53:42,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.6) internal successors, (108), 4 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) [2021-11-07 00:53:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 195 transitions. [2021-11-07 00:53:42,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 00:53:42,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:42,220 INFO L513 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] [2021-11-07 00:53:42,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 00:53:42,221 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:42,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:42,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2010259429, now seen corresponding path program 1 times [2021-11-07 00:53:42,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:53:42,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800956329] [2021-11-07 00:53:42,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:42,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:53:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:42,366 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:53:42,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800956329] [2021-11-07 00:53:42,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800956329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:42,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:42,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:53:42,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910503135] [2021-11-07 00:53:42,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:53:42,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:53:42,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:53:42,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:53:42,369 INFO L87 Difference]: Start difference. First operand 164 states and 195 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:42,541 INFO L93 Difference]: Finished difference Result 250 states and 309 transitions. [2021-11-07 00:53:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:53:42,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-11-07 00:53:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:42,543 INFO L225 Difference]: With dead ends: 250 [2021-11-07 00:53:42,543 INFO L226 Difference]: Without dead ends: 164 [2021-11-07 00:53:42,544 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:53:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-07 00:53:42,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-11-07 00:53:42,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1840490797546013) internal successors, (193), 163 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 193 transitions. [2021-11-07 00:53:42,560 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 193 transitions. Word has length 109 [2021-11-07 00:53:42,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:42,561 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 193 transitions. [2021-11-07 00:53:42,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 193 transitions. [2021-11-07 00:53:42,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 00:53:42,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:42,563 INFO L513 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] [2021-11-07 00:53:42,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 00:53:42,564 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:42,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:42,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1577877079, now seen corresponding path program 1 times [2021-11-07 00:53:42,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:53:42,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095703049] [2021-11-07 00:53:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:42,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:53:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:42,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:42,692 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:53:42,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095703049] [2021-11-07 00:53:42,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095703049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:42,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:42,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:53:42,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782107053] [2021-11-07 00:53:42,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:53:42,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:53:42,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:53:42,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:53:42,695 INFO L87 Difference]: Start difference. First operand 164 states and 193 transitions. Second operand has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:42,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:42,848 INFO L93 Difference]: Finished difference Result 258 states and 314 transitions. [2021-11-07 00:53:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:53:42,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-07 00:53:42,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:42,853 INFO L225 Difference]: With dead ends: 258 [2021-11-07 00:53:42,854 INFO L226 Difference]: Without dead ends: 164 [2021-11-07 00:53:42,856 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:53:42,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-07 00:53:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-11-07 00:53:42,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1717791411042944) internal successors, (191), 163 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:42,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 191 transitions. [2021-11-07 00:53:42,886 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 191 transitions. Word has length 110 [2021-11-07 00:53:42,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:42,888 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 191 transitions. [2021-11-07 00:53:42,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.0) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:42,888 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 191 transitions. [2021-11-07 00:53:42,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 00:53:42,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:42,894 INFO L513 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] [2021-11-07 00:53:42,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 00:53:42,894 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:42,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:42,895 INFO L85 PathProgramCache]: Analyzing trace with hash -633606909, now seen corresponding path program 1 times [2021-11-07 00:53:42,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:53:42,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996397595] [2021-11-07 00:53:42,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:42,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:53:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:43,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:53:43,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996397595] [2021-11-07 00:53:43,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996397595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:43,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:43,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:53:43,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125751609] [2021-11-07 00:53:43,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:53:43,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:53:43,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:53:43,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:53:43,027 INFO L87 Difference]: Start difference. First operand 164 states and 191 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 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) [2021-11-07 00:53:43,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:43,200 INFO L93 Difference]: Finished difference Result 262 states and 315 transitions. [2021-11-07 00:53:43,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:53:43,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 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 [2021-11-07 00:53:43,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:43,202 INFO L225 Difference]: With dead ends: 262 [2021-11-07 00:53:43,202 INFO L226 Difference]: Without dead ends: 164 [2021-11-07 00:53:43,203 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:53:43,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-07 00:53:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-11-07 00:53:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.165644171779141) internal successors, (190), 163 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 190 transitions. [2021-11-07 00:53:43,216 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 190 transitions. Word has length 111 [2021-11-07 00:53:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:43,216 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 190 transitions. [2021-11-07 00:53:43,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 4 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) [2021-11-07 00:53:43,217 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 190 transitions. [2021-11-07 00:53:43,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 00:53:43,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:43,218 INFO L513 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] [2021-11-07 00:53:43,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 00:53:43,219 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:43,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:43,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1363824331, now seen corresponding path program 1 times [2021-11-07 00:53:43,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:53:43,220 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844814642] [2021-11-07 00:53:43,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:43,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:53:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:43,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:53:43,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844814642] [2021-11-07 00:53:43,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844814642] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:43,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:43,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:53:43,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128854613] [2021-11-07 00:53:43,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:53:43,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:53:43,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:53:43,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:53:43,329 INFO L87 Difference]: Start difference. First operand 164 states and 190 transitions. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:43,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:43,470 INFO L93 Difference]: Finished difference Result 238 states and 288 transitions. [2021-11-07 00:53:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:53:43,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 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 112 [2021-11-07 00:53:43,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:43,472 INFO L225 Difference]: With dead ends: 238 [2021-11-07 00:53:43,473 INFO L226 Difference]: Without dead ends: 164 [2021-11-07 00:53:43,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:53:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-07 00:53:43,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-11-07 00:53:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1533742331288344) internal successors, (188), 163 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 188 transitions. [2021-11-07 00:53:43,487 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 188 transitions. Word has length 112 [2021-11-07 00:53:43,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:43,487 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 188 transitions. [2021-11-07 00:53:43,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:43,488 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 188 transitions. [2021-11-07 00:53:43,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-07 00:53:43,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:43,489 INFO L513 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] [2021-11-07 00:53:43,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 00:53:43,490 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:43,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:43,490 INFO L85 PathProgramCache]: Analyzing trace with hash -45070541, now seen corresponding path program 1 times [2021-11-07 00:53:43,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:53:43,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005537203] [2021-11-07 00:53:43,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:43,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:53:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:43,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:53:43,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005537203] [2021-11-07 00:53:43,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005537203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:43,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:43,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:53:43,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251364610] [2021-11-07 00:53:43,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:53:43,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:53:43,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:53:43,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:53:43,581 INFO L87 Difference]: Start difference. First operand 164 states and 188 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 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) [2021-11-07 00:53:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:43,729 INFO L93 Difference]: Finished difference Result 242 states and 289 transitions. [2021-11-07 00:53:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:53:43,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 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 [2021-11-07 00:53:43,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:43,731 INFO L225 Difference]: With dead ends: 242 [2021-11-07 00:53:43,732 INFO L226 Difference]: Without dead ends: 164 [2021-11-07 00:53:43,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:53:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-07 00:53:43,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-11-07 00:53:43,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1411042944785277) internal successors, (186), 163 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:43,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 186 transitions. [2021-11-07 00:53:43,748 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 186 transitions. Word has length 113 [2021-11-07 00:53:43,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:43,749 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 186 transitions. [2021-11-07 00:53:43,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 4 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) [2021-11-07 00:53:43,749 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 186 transitions. [2021-11-07 00:53:43,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 00:53:43,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:43,751 INFO L513 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] [2021-11-07 00:53:43,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 00:53:43,751 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:43,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:43,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1668919745, now seen corresponding path program 1 times [2021-11-07 00:53:43,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:53:43,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55036019] [2021-11-07 00:53:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:43,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:53:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:53:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:53:43,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:53:43,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55036019] [2021-11-07 00:53:43,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55036019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:53:43,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:53:43,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:53:43,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73306152] [2021-11-07 00:53:43,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 00:53:43,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:53:43,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 00:53:43,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 00:53:43,847 INFO L87 Difference]: Start difference. First operand 164 states and 186 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:43,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:53:43,990 INFO L93 Difference]: Finished difference Result 234 states and 277 transitions. [2021-11-07 00:53:43,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 00:53:43,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-11-07 00:53:43,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:53:43,993 INFO L225 Difference]: With dead ends: 234 [2021-11-07 00:53:43,993 INFO L226 Difference]: Without dead ends: 164 [2021-11-07 00:53:43,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 00:53:43,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-07 00:53:44,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-11-07 00:53:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1288343558282208) internal successors, (184), 163 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:44,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 184 transitions. [2021-11-07 00:53:44,009 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 184 transitions. Word has length 114 [2021-11-07 00:53:44,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:53:44,009 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 184 transitions. [2021-11-07 00:53:44,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:53:44,010 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 184 transitions. [2021-11-07 00:53:44,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-07 00:53:44,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:53:44,011 INFO L513 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] [2021-11-07 00:53:44,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 00:53:44,012 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:53:44,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:53:44,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1008285365, now seen corresponding path program 1 times [2021-11-07 00:53:44,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:53:44,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216393150] [2021-11-07 00:53:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:53:44,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:53:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:01,932 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:54:01,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216393150] [2021-11-07 00:54:01,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216393150] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:01,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:01,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-11-07 00:54:01,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848056646] [2021-11-07 00:54:01,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-07 00:54:01,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:54:01,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-07 00:54:01,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2611, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 00:54:01,947 INFO L87 Difference]: Start difference. First operand 164 states and 184 transitions. Second operand has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:25,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:54:25,910 INFO L93 Difference]: Finished difference Result 329 states and 407 transitions. [2021-11-07 00:54:25,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-07 00:54:25,911 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2021-11-07 00:54:25,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:54:25,914 INFO L225 Difference]: With dead ends: 329 [2021-11-07 00:54:25,914 INFO L226 Difference]: Without dead ends: 273 [2021-11-07 00:54:25,919 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=2104, Invalid=6826, Unknown=0, NotChecked=0, Total=8930 [2021-11-07 00:54:25,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-07 00:54:25,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 269. [2021-11-07 00:54:25,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.2201492537313432) internal successors, (327), 268 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 327 transitions. [2021-11-07 00:54:25,954 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 327 transitions. Word has length 115 [2021-11-07 00:54:25,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:54:25,954 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 327 transitions. [2021-11-07 00:54:25,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 53 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:54:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 327 transitions. [2021-11-07 00:54:25,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 00:54:25,956 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:54:25,956 INFO L513 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] [2021-11-07 00:54:25,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 00:54:25,957 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:54:25,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:54:25,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1861668950, now seen corresponding path program 1 times [2021-11-07 00:54:25,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:54:25,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7630669] [2021-11-07 00:54:25,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:54:25,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:54:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:54:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:54:46,232 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:54:46,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7630669] [2021-11-07 00:54:46,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7630669] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:54:46,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:54:46,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-11-07 00:54:46,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680121803] [2021-11-07 00:54:46,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-07 00:54:46,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:54:46,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-07 00:54:46,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=3177, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 00:54:46,237 INFO L87 Difference]: Start difference. First operand 269 states and 327 transitions. Second operand has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:16,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:16,649 INFO L93 Difference]: Finished difference Result 547 states and 704 transitions. [2021-11-07 00:55:16,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-07 00:55:16,650 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-11-07 00:55:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:16,652 INFO L225 Difference]: With dead ends: 547 [2021-11-07 00:55:16,652 INFO L226 Difference]: Without dead ends: 386 [2021-11-07 00:55:16,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=2391, Invalid=8951, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 00:55:16,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-07 00:55:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 379. [2021-11-07 00:55:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.2592592592592593) internal successors, (476), 378 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 476 transitions. [2021-11-07 00:55:16,709 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 476 transitions. Word has length 117 [2021-11-07 00:55:16,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:16,710 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 476 transitions. [2021-11-07 00:55:16,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:16,710 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 476 transitions. [2021-11-07 00:55:16,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 00:55:16,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:16,712 INFO L513 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] [2021-11-07 00:55:16,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 00:55:16,712 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1598554838, now seen corresponding path program 1 times [2021-11-07 00:55:16,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:16,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379183167] [2021-11-07 00:55:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:16,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:16,893 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:16,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379183167] [2021-11-07 00:55:16,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379183167] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:16,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:16,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 00:55:16,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145594380] [2021-11-07 00:55:16,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 00:55:16,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:16,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 00:55:16,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:55:16,895 INFO L87 Difference]: Start difference. First operand 379 states and 476 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:16,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:16,991 INFO L93 Difference]: Finished difference Result 807 states and 1057 transitions. [2021-11-07 00:55:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 00:55:16,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 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 117 [2021-11-07 00:55:16,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:16,995 INFO L225 Difference]: With dead ends: 807 [2021-11-07 00:55:16,995 INFO L226 Difference]: Without dead ends: 538 [2021-11-07 00:55:16,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 00:55:16,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-07 00:55:17,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 536. [2021-11-07 00:55:17,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 1.2841121495327104) internal successors, (687), 535 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 687 transitions. [2021-11-07 00:55:17,072 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 687 transitions. Word has length 117 [2021-11-07 00:55:17,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:17,073 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 687 transitions. [2021-11-07 00:55:17,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:17,073 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 687 transitions. [2021-11-07 00:55:17,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 00:55:17,074 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:17,074 INFO L513 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] [2021-11-07 00:55:17,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 00:55:17,075 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:17,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:17,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1892442895, now seen corresponding path program 1 times [2021-11-07 00:55:17,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:17,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432445877] [2021-11-07 00:55:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:17,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:17,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:17,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432445877] [2021-11-07 00:55:17,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432445877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:17,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:17,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-07 00:55:17,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287748213] [2021-11-07 00:55:17,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 00:55:17,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:17,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 00:55:17,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 00:55:17,187 INFO L87 Difference]: Start difference. First operand 536 states and 687 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 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) [2021-11-07 00:55:17,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:17,397 INFO L93 Difference]: Finished difference Result 953 states and 1245 transitions. [2021-11-07 00:55:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 00:55:17,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 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 [2021-11-07 00:55:17,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:17,403 INFO L225 Difference]: With dead ends: 953 [2021-11-07 00:55:17,403 INFO L226 Difference]: Without dead ends: 792 [2021-11-07 00:55:17,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-07 00:55:17,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-11-07 00:55:17,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 481. [2021-11-07 00:55:17,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.2708333333333333) internal successors, (610), 480 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:17,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 610 transitions. [2021-11-07 00:55:17,484 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 610 transitions. Word has length 118 [2021-11-07 00:55:17,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:17,485 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 610 transitions. [2021-11-07 00:55:17,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 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) [2021-11-07 00:55:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 610 transitions. [2021-11-07 00:55:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 00:55:17,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:17,487 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:17,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 00:55:17,488 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:17,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:17,488 INFO L85 PathProgramCache]: Analyzing trace with hash 409660074, now seen corresponding path program 1 times [2021-11-07 00:55:17,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:17,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118871606] [2021-11-07 00:55:17,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:17,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:17,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:17,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118871606] [2021-11-07 00:55:17,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118871606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:17,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:17,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:55:17,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088196009] [2021-11-07 00:55:17,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:55:17,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:17,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:55:17,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:55:17,581 INFO L87 Difference]: Start difference. First operand 481 states and 610 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:17,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:17,699 INFO L93 Difference]: Finished difference Result 839 states and 1095 transitions. [2021-11-07 00:55:17,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:55:17,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-07 00:55:17,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:17,704 INFO L225 Difference]: With dead ends: 839 [2021-11-07 00:55:17,704 INFO L226 Difference]: Without dead ends: 575 [2021-11-07 00:55:17,705 INFO L786 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 [2021-11-07 00:55:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-07 00:55:17,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 553. [2021-11-07 00:55:17,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 1.2735507246376812) internal successors, (703), 552 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:17,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 703 transitions. [2021-11-07 00:55:17,794 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 703 transitions. Word has length 137 [2021-11-07 00:55:17,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:17,795 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 703 transitions. [2021-11-07 00:55:17,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:17,795 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 703 transitions. [2021-11-07 00:55:17,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-07 00:55:17,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:17,797 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:17,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 00:55:17,798 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:17,798 INFO L85 PathProgramCache]: Analyzing trace with hash -680771679, now seen corresponding path program 1 times [2021-11-07 00:55:17,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:17,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267492727] [2021-11-07 00:55:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:17,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:17,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:17,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267492727] [2021-11-07 00:55:17,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267492727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:17,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:17,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:55:17,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308467656] [2021-11-07 00:55:17,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:55:17,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:17,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:55:17,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:55:17,893 INFO L87 Difference]: Start difference. First operand 553 states and 703 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:18,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:18,042 INFO L93 Difference]: Finished difference Result 1095 states and 1437 transitions. [2021-11-07 00:55:18,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:55:18,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-07 00:55:18,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:18,048 INFO L225 Difference]: With dead ends: 1095 [2021-11-07 00:55:18,048 INFO L226 Difference]: Without dead ends: 771 [2021-11-07 00:55:18,049 INFO L786 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 [2021-11-07 00:55:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-11-07 00:55:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 741. [2021-11-07 00:55:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 1.2945945945945947) internal successors, (958), 740 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:18,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 958 transitions. [2021-11-07 00:55:18,171 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 958 transitions. Word has length 140 [2021-11-07 00:55:18,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:18,172 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 958 transitions. [2021-11-07 00:55:18,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:18,172 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 958 transitions. [2021-11-07 00:55:18,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 00:55:18,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:18,174 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:18,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 00:55:18,175 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:18,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:18,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1893264623, now seen corresponding path program 1 times [2021-11-07 00:55:18,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:18,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867335439] [2021-11-07 00:55:18,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:18,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:18,266 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:18,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867335439] [2021-11-07 00:55:18,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867335439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:18,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:18,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:55:18,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057326801] [2021-11-07 00:55:18,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:55:18,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:18,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:55:18,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:55:18,269 INFO L87 Difference]: Start difference. First operand 741 states and 958 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:18,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:18,489 INFO L93 Difference]: Finished difference Result 1665 states and 2209 transitions. [2021-11-07 00:55:18,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:55:18,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-07 00:55:18,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:18,497 INFO L225 Difference]: With dead ends: 1665 [2021-11-07 00:55:18,497 INFO L226 Difference]: Without dead ends: 1159 [2021-11-07 00:55:18,498 INFO L786 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 [2021-11-07 00:55:18,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-11-07 00:55:18,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1117. [2021-11-07 00:55:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 1.3127240143369177) internal successors, (1465), 1116 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:18,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1465 transitions. [2021-11-07 00:55:18,698 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1465 transitions. Word has length 143 [2021-11-07 00:55:18,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:18,698 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 1465 transitions. [2021-11-07 00:55:18,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:18,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1465 transitions. [2021-11-07 00:55:18,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 00:55:18,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:18,701 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:18,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 00:55:18,701 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:18,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:18,702 INFO L85 PathProgramCache]: Analyzing trace with hash 2128875416, now seen corresponding path program 1 times [2021-11-07 00:55:18,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:18,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994986455] [2021-11-07 00:55:18,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:18,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:18,793 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:18,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994986455] [2021-11-07 00:55:18,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994986455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:18,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:18,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:55:18,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160472457] [2021-11-07 00:55:18,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:55:18,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:18,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:55:18,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:55:18,797 INFO L87 Difference]: Start difference. First operand 1117 states and 1465 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:19,137 INFO L93 Difference]: Finished difference Result 2799 states and 3740 transitions. [2021-11-07 00:55:19,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:55:19,137 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2021-11-07 00:55:19,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:19,149 INFO L225 Difference]: With dead ends: 2799 [2021-11-07 00:55:19,149 INFO L226 Difference]: Without dead ends: 1923 [2021-11-07 00:55:19,151 INFO L786 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 [2021-11-07 00:55:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-11-07 00:55:19,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1857. [2021-11-07 00:55:19,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1856 states have (on average 1.3254310344827587) internal successors, (2460), 1856 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2460 transitions. [2021-11-07 00:55:19,473 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2460 transitions. Word has length 146 [2021-11-07 00:55:19,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:19,474 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2460 transitions. [2021-11-07 00:55:19,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2460 transitions. [2021-11-07 00:55:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 00:55:19,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:19,476 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:19,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 00:55:19,476 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:19,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:19,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1961719849, now seen corresponding path program 1 times [2021-11-07 00:55:19,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:19,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311785282] [2021-11-07 00:55:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:19,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:19,560 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:19,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311785282] [2021-11-07 00:55:19,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311785282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:19,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:19,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:55:19,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807805198] [2021-11-07 00:55:19,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:55:19,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:19,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:55:19,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:55:19,562 INFO L87 Difference]: Start difference. First operand 1857 states and 2460 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:20,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:20,111 INFO L93 Difference]: Finished difference Result 5025 states and 6735 transitions. [2021-11-07 00:55:20,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:55:20,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 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 149 [2021-11-07 00:55:20,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:20,132 INFO L225 Difference]: With dead ends: 5025 [2021-11-07 00:55:20,132 INFO L226 Difference]: Without dead ends: 3415 [2021-11-07 00:55:20,158 INFO L786 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 [2021-11-07 00:55:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3415 states. [2021-11-07 00:55:20,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3415 to 3301. [2021-11-07 00:55:20,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3301 states, 3300 states have (on average 1.3318181818181818) internal successors, (4395), 3300 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:20,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3301 states to 3301 states and 4395 transitions. [2021-11-07 00:55:20,772 INFO L78 Accepts]: Start accepts. Automaton has 3301 states and 4395 transitions. Word has length 149 [2021-11-07 00:55:20,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:20,773 INFO L470 AbstractCegarLoop]: Abstraction has 3301 states and 4395 transitions. [2021-11-07 00:55:20,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:20,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3301 states and 4395 transitions. [2021-11-07 00:55:20,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-07 00:55:20,775 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:20,775 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:20,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 00:55:20,776 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:20,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1229100635, now seen corresponding path program 1 times [2021-11-07 00:55:20,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:20,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609675336] [2021-11-07 00:55:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:20,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:20,860 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:20,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609675336] [2021-11-07 00:55:20,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609675336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:20,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:20,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:55:20,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136887248] [2021-11-07 00:55:20,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:55:20,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:20,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:55:20,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:55:20,863 INFO L87 Difference]: Start difference. First operand 3301 states and 4395 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:21,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:21,888 INFO L93 Difference]: Finished difference Result 9363 states and 12550 transitions. [2021-11-07 00:55:21,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:55:21,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2021-11-07 00:55:21,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:21,926 INFO L225 Difference]: With dead ends: 9363 [2021-11-07 00:55:21,926 INFO L226 Difference]: Without dead ends: 6315 [2021-11-07 00:55:21,932 INFO L786 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 [2021-11-07 00:55:21,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6315 states. [2021-11-07 00:55:23,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6315 to 6105. [2021-11-07 00:55:23,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6105 states, 6104 states have (on average 1.333224115334207) internal successors, (8138), 6104 states have internal predecessors, (8138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:23,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6105 states to 6105 states and 8138 transitions. [2021-11-07 00:55:23,068 INFO L78 Accepts]: Start accepts. Automaton has 6105 states and 8138 transitions. Word has length 152 [2021-11-07 00:55:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:23,069 INFO L470 AbstractCegarLoop]: Abstraction has 6105 states and 8138 transitions. [2021-11-07 00:55:23,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 6105 states and 8138 transitions. [2021-11-07 00:55:23,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-07 00:55:23,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:23,072 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:23,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 00:55:23,072 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:23,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:23,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1191310353, now seen corresponding path program 1 times [2021-11-07 00:55:23,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:23,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522045386] [2021-11-07 00:55:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:23,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:23,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:23,171 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:23,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522045386] [2021-11-07 00:55:23,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522045386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:23,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:23,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:55:23,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450149156] [2021-11-07 00:55:23,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:55:23,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:23,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:55:23,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:55:23,175 INFO L87 Difference]: Start difference. First operand 6105 states and 8138 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 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) [2021-11-07 00:55:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:24,717 INFO L93 Difference]: Finished difference Result 17781 states and 23789 transitions. [2021-11-07 00:55:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:55:24,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 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 155 [2021-11-07 00:55:24,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:24,788 INFO L225 Difference]: With dead ends: 17781 [2021-11-07 00:55:24,788 INFO L226 Difference]: Without dead ends: 11935 [2021-11-07 00:55:24,797 INFO L786 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 [2021-11-07 00:55:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11935 states. [2021-11-07 00:55:26,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11935 to 11533. [2021-11-07 00:55:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11533 states, 11532 states have (on average 1.3313388831078738) internal successors, (15353), 11532 states have internal predecessors, (15353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11533 states to 11533 states and 15353 transitions. [2021-11-07 00:55:26,865 INFO L78 Accepts]: Start accepts. Automaton has 11533 states and 15353 transitions. Word has length 155 [2021-11-07 00:55:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:26,866 INFO L470 AbstractCegarLoop]: Abstraction has 11533 states and 15353 transitions. [2021-11-07 00:55:26,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 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) [2021-11-07 00:55:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 11533 states and 15353 transitions. [2021-11-07 00:55:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-07 00:55:26,868 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:26,868 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:26,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 00:55:26,869 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:26,870 INFO L85 PathProgramCache]: Analyzing trace with hash -328185564, now seen corresponding path program 1 times [2021-11-07 00:55:26,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:26,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941002103] [2021-11-07 00:55:26,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:26,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 00:55:26,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:26,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941002103] [2021-11-07 00:55:26,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941002103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:26,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:26,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:55:26,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935691455] [2021-11-07 00:55:26,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:55:26,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:26,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:55:26,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:55:26,953 INFO L87 Difference]: Start difference. First operand 11533 states and 15353 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:29,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:29,711 INFO L93 Difference]: Finished difference Result 34315 states and 45764 transitions. [2021-11-07 00:55:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:55:29,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 160 [2021-11-07 00:55:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:29,782 INFO L225 Difference]: With dead ends: 34315 [2021-11-07 00:55:29,782 INFO L226 Difference]: Without dead ends: 22940 [2021-11-07 00:55:29,805 INFO L786 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 [2021-11-07 00:55:29,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22940 states. [2021-11-07 00:55:32,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22940 to 22150. [2021-11-07 00:55:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22150 states, 22149 states have (on average 1.327147952503499) internal successors, (29395), 22149 states have internal predecessors, (29395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:33,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22150 states to 22150 states and 29395 transitions. [2021-11-07 00:55:33,073 INFO L78 Accepts]: Start accepts. Automaton has 22150 states and 29395 transitions. Word has length 160 [2021-11-07 00:55:33,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:33,074 INFO L470 AbstractCegarLoop]: Abstraction has 22150 states and 29395 transitions. [2021-11-07 00:55:33,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:33,074 INFO L276 IsEmpty]: Start isEmpty. Operand 22150 states and 29395 transitions. [2021-11-07 00:55:33,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-07 00:55:33,076 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:33,077 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:33,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 00:55:33,077 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:33,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:33,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1669809110, now seen corresponding path program 1 times [2021-11-07 00:55:33,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:33,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903015293] [2021-11-07 00:55:33,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:33,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 00:55:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 00:55:33,151 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 00:55:33,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903015293] [2021-11-07 00:55:33,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903015293] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 00:55:33,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 00:55:33,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 00:55:33,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206599414] [2021-11-07 00:55:33,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 00:55:33,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 00:55:33,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 00:55:33,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 00:55:33,153 INFO L87 Difference]: Start difference. First operand 22150 states and 29395 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 00:55:35,988 INFO L93 Difference]: Finished difference Result 44100 states and 58573 transitions. [2021-11-07 00:55:35,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 00:55:35,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 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 163 [2021-11-07 00:55:35,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 00:55:36,057 INFO L225 Difference]: With dead ends: 44100 [2021-11-07 00:55:36,057 INFO L226 Difference]: Without dead ends: 22104 [2021-11-07 00:55:36,097 INFO L786 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 [2021-11-07 00:55:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22104 states. [2021-11-07 00:55:39,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22104 to 19069. [2021-11-07 00:55:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19069 states, 19068 states have (on average 1.3083176001678205) internal successors, (24947), 19068 states have internal predecessors, (24947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19069 states to 19069 states and 24947 transitions. [2021-11-07 00:55:39,067 INFO L78 Accepts]: Start accepts. Automaton has 19069 states and 24947 transitions. Word has length 163 [2021-11-07 00:55:39,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 00:55:39,068 INFO L470 AbstractCegarLoop]: Abstraction has 19069 states and 24947 transitions. [2021-11-07 00:55:39,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 00:55:39,069 INFO L276 IsEmpty]: Start isEmpty. Operand 19069 states and 24947 transitions. [2021-11-07 00:55:39,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-07 00:55:39,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 00:55:39,072 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 00:55:39,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 00:55:39,073 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 00:55:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 00:55:39,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1382551466, now seen corresponding path program 1 times [2021-11-07 00:55:39,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 00:55:39,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432185726] [2021-11-07 00:55:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 00:55:39,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 00:55:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat