./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9839c19-c8db-4fe7-9c6a-886744afa58b/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9839c19-c8db-4fe7-9c6a-886744afa58b/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9839c19-c8db-4fe7-9c6a-886744afa58b/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9839c19-c8db-4fe7-9c6a-886744afa58b/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9839c19-c8db-4fe7-9c6a-886744afa58b/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9839c19-c8db-4fe7-9c6a-886744afa58b/bin/utaipan-aC7eJsxGYH --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 ff8f3f7dc837fc67a7020fd9a9dd65135ef198f3603f2c180bcb5ad9943191ea --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:07:52,428 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:07:52,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:07:52,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:07:52,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:07:52,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:07:52,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:07:52,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:07:52,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:07:52,513 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:07:52,514 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:07:52,516 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:07:52,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:07:52,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:07:52,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:07:52,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:07:52,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:07:52,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:07:52,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:07:52,539 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:07:52,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:07:52,543 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:07:52,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:07:52,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:07:52,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:07:52,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:07:52,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:07:52,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:07:52,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:07:52,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:07:52,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:07:52,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:07:52,562 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:07:52,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:07:52,565 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:07:52,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:07:52,566 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:07:52,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:07:52,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:07:52,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:07:52,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:07:52,569 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9839c19-c8db-4fe7-9c6a-886744afa58b/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:07:52,618 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:07:52,618 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:07:52,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:07:52,620 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:07:52,620 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:07:52,621 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:07:52,621 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:07:52,621 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:07:52,621 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:07:52,622 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:07:52,623 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:07:52,623 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:07:52,623 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:07:52,624 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:07:52,624 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:07:52,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:07:52,629 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:07:52,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:07:52,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:07:52,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:07:52,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:07:52,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:07:52,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:07:52,630 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:07:52,630 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:07:52,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:07:52,630 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:07:52,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:07:52,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:07:52,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:07:52,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:07:52,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:07:52,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:07:52,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:07:52,632 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:07:52,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:07:52,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:07:52,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:07:52,633 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:07:52,633 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_f9839c19-c8db-4fe7-9c6a-886744afa58b/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9839c19-c8db-4fe7-9c6a-886744afa58b/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff8f3f7dc837fc67a7020fd9a9dd65135ef198f3603f2c180bcb5ad9943191ea [2021-11-03 04:07:52,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:07:52,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:07:52,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:07:52,998 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:07:52,999 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:07:53,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9839c19-c8db-4fe7-9c6a-886744afa58b/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-03 04:07:53,069 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9839c19-c8db-4fe7-9c6a-886744afa58b/bin/utaipan-aC7eJsxGYH/data/e2a02dc8d/b8f9029c418c460fb5ece58574c10994/FLAG1da39f703 [2021-11-03 04:07:53,744 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:07:53,744 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9839c19-c8db-4fe7-9c6a-886744afa58b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-03 04:07:53,756 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9839c19-c8db-4fe7-9c6a-886744afa58b/bin/utaipan-aC7eJsxGYH/data/e2a02dc8d/b8f9029c418c460fb5ece58574c10994/FLAG1da39f703 [2021-11-03 04:07:54,041 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9839c19-c8db-4fe7-9c6a-886744afa58b/bin/utaipan-aC7eJsxGYH/data/e2a02dc8d/b8f9029c418c460fb5ece58574c10994 [2021-11-03 04:07:54,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:07:54,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:07:54,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:07:54,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:07:54,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:07:54,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:07:54" (1/1) ... [2021-11-03 04:07:54,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@414578b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:54, skipping insertion in model container [2021-11-03 04:07:54,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:07:54" (1/1) ... [2021-11-03 04:07:54,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:07:54,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:07:54,397 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_f9839c19-c8db-4fe7-9c6a-886744afa58b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8460,8473] [2021-11-03 04:07:54,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:07:54,475 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:07:54,537 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_f9839c19-c8db-4fe7-9c6a-886744afa58b/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[8460,8473] [2021-11-03 04:07:54,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:07:54,613 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:07:54,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:54 WrapperNode [2021-11-03 04:07:54,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:07:54,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:07:54,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:07:54,615 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:07:54,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:54" (1/1) ... [2021-11-03 04:07:54,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:54" (1/1) ... [2021-11-03 04:07:54,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:07:54,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:07:54,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:07:54,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:07:54,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:54" (1/1) ... [2021-11-03 04:07:54,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:54" (1/1) ... [2021-11-03 04:07:54,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:54" (1/1) ... [2021-11-03 04:07:54,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:54" (1/1) ... [2021-11-03 04:07:54,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:54" (1/1) ... [2021-11-03 04:07:54,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:54" (1/1) ... [2021-11-03 04:07:54,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:54" (1/1) ... [2021-11-03 04:07:54,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:07:54,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:07:54,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:07:54,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:07:54,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:54" (1/1) ... [2021-11-03 04:07:54,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:07:54,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9839c19-c8db-4fe7-9c6a-886744afa58b/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:07:54,816 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9839c19-c8db-4fe7-9c6a-886744afa58b/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:07:54,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9839c19-c8db-4fe7-9c6a-886744afa58b/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:07:54,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:07:54,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:07:54,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:07:54,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:07:56,519 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:07:56,519 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-03 04:07:56,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:07:56 BoogieIcfgContainer [2021-11-03 04:07:56,522 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:07:56,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:07:56,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:07:56,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:07:56,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:07:54" (1/3) ... [2021-11-03 04:07:56,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@226a812d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:07:56, skipping insertion in model container [2021-11-03 04:07:56,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:07:54" (2/3) ... [2021-11-03 04:07:56,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@226a812d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:07:56, skipping insertion in model container [2021-11-03 04:07:56,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:07:56" (3/3) ... [2021-11-03 04:07:56,530 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-03 04:07:56,536 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:07:56,536 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:07:56,588 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:07:56,594 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 [2021-11-03 04:07:56,595 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:07:56,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 160 states have (on average 1.70625) internal successors, (273), 161 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:56,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 04:07:56,624 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:07:56,625 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] [2021-11-03 04:07:56,626 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:07:56,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:07:56,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1610035945, now seen corresponding path program 1 times [2021-11-03 04:07:56,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:07:56,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907333944] [2021-11-03 04:07:56,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:07:56,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:07:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:07:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:07:57,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:07:57,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907333944] [2021-11-03 04:07:57,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907333944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:07:57,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:07:57,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-03 04:07:57,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235612350] [2021-11-03 04:07:57,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:07:57,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:07:57,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:07:57,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:07:57,260 INFO L87 Difference]: Start difference. First operand has 162 states, 160 states have (on average 1.70625) internal successors, (273), 161 states have internal predecessors, (273), 0 states have call successors, (0), 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 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:57,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:07:57,676 INFO L93 Difference]: Finished difference Result 564 states and 904 transitions. [2021-11-03 04:07:57,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 04:07:57,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-03 04:07:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:07:57,707 INFO L225 Difference]: With dead ends: 564 [2021-11-03 04:07:57,707 INFO L226 Difference]: Without dead ends: 469 [2021-11-03 04:07:57,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:07:57,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-03 04:07:57,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 461. [2021-11-03 04:07:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.4152173913043478) internal successors, (651), 460 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:57,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 651 transitions. [2021-11-03 04:07:57,832 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 651 transitions. Word has length 67 [2021-11-03 04:07:57,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:07:57,833 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 651 transitions. [2021-11-03 04:07:57,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:57,834 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 651 transitions. [2021-11-03 04:07:57,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:07:57,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:07:57,846 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] [2021-11-03 04:07:57,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:07:57,847 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:07:57,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:07:57,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1760526780, now seen corresponding path program 1 times [2021-11-03 04:07:57,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:07:57,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979293349] [2021-11-03 04:07:57,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:07:57,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:07:57,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:07:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:07:58,042 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:07:58,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979293349] [2021-11-03 04:07:58,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979293349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:07:58,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:07:58,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:07:58,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020789577] [2021-11-03 04:07:58,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:07:58,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:07:58,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:07:58,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:07:58,050 INFO L87 Difference]: Start difference. First operand 461 states and 651 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:07:58,439 INFO L93 Difference]: Finished difference Result 1109 states and 1611 transitions. [2021-11-03 04:07:58,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:07:58,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-03 04:07:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:07:58,446 INFO L225 Difference]: With dead ends: 1109 [2021-11-03 04:07:58,446 INFO L226 Difference]: Without dead ends: 728 [2021-11-03 04:07:58,453 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 [2021-11-03 04:07:58,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-11-03 04:07:58,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 726. [2021-11-03 04:07:58,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.446896551724138) internal successors, (1049), 725 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:58,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1049 transitions. [2021-11-03 04:07:58,550 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1049 transitions. Word has length 68 [2021-11-03 04:07:58,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:07:58,551 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 1049 transitions. [2021-11-03 04:07:58,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:58,552 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1049 transitions. [2021-11-03 04:07:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:07:58,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:07:58,556 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] [2021-11-03 04:07:58,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:07:58,556 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:07:58,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:07:58,558 INFO L85 PathProgramCache]: Analyzing trace with hash 2037546003, now seen corresponding path program 1 times [2021-11-03 04:07:58,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:07:58,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942446071] [2021-11-03 04:07:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:07:58,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:07:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:07:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:07:58,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:07:58,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942446071] [2021-11-03 04:07:58,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942446071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:07:58,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:07:58,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:07:58,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176416209] [2021-11-03 04:07:58,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:07:58,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:07:58,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:07:58,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:07:58,735 INFO L87 Difference]: Start difference. First operand 726 states and 1049 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:59,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:07:59,136 INFO L93 Difference]: Finished difference Result 1874 states and 2770 transitions. [2021-11-03 04:07:59,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:07:59,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-03 04:07:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:07:59,148 INFO L225 Difference]: With dead ends: 1874 [2021-11-03 04:07:59,148 INFO L226 Difference]: Without dead ends: 1258 [2021-11-03 04:07:59,150 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 [2021-11-03 04:07:59,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-11-03 04:07:59,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1256. [2021-11-03 04:07:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1255 states have (on average 1.4685258964143426) internal successors, (1843), 1255 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:59,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1843 transitions. [2021-11-03 04:07:59,274 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1843 transitions. Word has length 68 [2021-11-03 04:07:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:07:59,276 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 1843 transitions. [2021-11-03 04:07:59,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:59,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1843 transitions. [2021-11-03 04:07:59,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:07:59,279 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:07:59,280 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] [2021-11-03 04:07:59,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 04:07:59,280 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:07:59,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:07:59,282 INFO L85 PathProgramCache]: Analyzing trace with hash -351900638, now seen corresponding path program 1 times [2021-11-03 04:07:59,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:07:59,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313940318] [2021-11-03 04:07:59,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:07:59,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:07:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:07:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:07:59,424 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:07:59,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313940318] [2021-11-03 04:07:59,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313940318] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:07:59,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:07:59,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:07:59,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44034121] [2021-11-03 04:07:59,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:07:59,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:07:59,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:07:59,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:07:59,427 INFO L87 Difference]: Start difference. First operand 1256 states and 1843 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:07:59,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:07:59,883 INFO L93 Difference]: Finished difference Result 3430 states and 5115 transitions. [2021-11-03 04:07:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:07:59,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-03 04:07:59,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:07:59,902 INFO L225 Difference]: With dead ends: 3430 [2021-11-03 04:07:59,902 INFO L226 Difference]: Without dead ends: 2318 [2021-11-03 04:07:59,906 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 [2021-11-03 04:07:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-11-03 04:08:00,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2316. [2021-11-03 04:08:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 1.4807775377969763) internal successors, (3428), 2315 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3428 transitions. [2021-11-03 04:08:00,160 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3428 transitions. Word has length 68 [2021-11-03 04:08:00,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:00,161 INFO L470 AbstractCegarLoop]: Abstraction has 2316 states and 3428 transitions. [2021-11-03 04:08:00,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:00,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3428 transitions. [2021-11-03 04:08:00,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:08:00,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:00,165 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] [2021-11-03 04:08:00,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 04:08:00,165 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:00,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:00,166 INFO L85 PathProgramCache]: Analyzing trace with hash 414577333, now seen corresponding path program 1 times [2021-11-03 04:08:00,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:08:00,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929532237] [2021-11-03 04:08:00,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:00,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:08:00,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:00,273 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:08:00,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929532237] [2021-11-03 04:08:00,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929532237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:00,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:00,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:08:00,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559848712] [2021-11-03 04:08:00,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:08:00,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:08:00,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:08:00,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:08:00,276 INFO L87 Difference]: Start difference. First operand 2316 states and 3428 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:00,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:00,974 INFO L93 Difference]: Finished difference Result 6697 states and 9989 transitions. [2021-11-03 04:08:00,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:08:00,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-03 04:08:00,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:01,003 INFO L225 Difference]: With dead ends: 6697 [2021-11-03 04:08:01,003 INFO L226 Difference]: Without dead ends: 4438 [2021-11-03 04:08:01,007 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 [2021-11-03 04:08:01,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-11-03 04:08:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 4436. [2021-11-03 04:08:01,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4436 states, 4435 states have (on average 1.4793686583990981) internal successors, (6561), 4435 states have internal predecessors, (6561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 6561 transitions. [2021-11-03 04:08:01,436 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 6561 transitions. Word has length 68 [2021-11-03 04:08:01,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:01,436 INFO L470 AbstractCegarLoop]: Abstraction has 4436 states and 6561 transitions. [2021-11-03 04:08:01,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:01,437 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 6561 transitions. [2021-11-03 04:08:01,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 04:08:01,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:01,439 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] [2021-11-03 04:08:01,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 04:08:01,439 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:01,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:01,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1356310170, now seen corresponding path program 1 times [2021-11-03 04:08:01,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:08:01,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245247101] [2021-11-03 04:08:01,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:01,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:08:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:01,502 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:08:01,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245247101] [2021-11-03 04:08:01,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245247101] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:01,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:01,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:08:01,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285109111] [2021-11-03 04:08:01,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:08:01,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:08:01,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:08:01,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:08:01,506 INFO L87 Difference]: Start difference. First operand 4436 states and 6561 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:02,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:02,493 INFO L93 Difference]: Finished difference Result 12353 states and 18326 transitions. [2021-11-03 04:08:02,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:08:02,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-11-03 04:08:02,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:02,545 INFO L225 Difference]: With dead ends: 12353 [2021-11-03 04:08:02,546 INFO L226 Difference]: Without dead ends: 7958 [2021-11-03 04:08:02,554 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 [2021-11-03 04:08:02,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2021-11-03 04:08:03,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7956. [2021-11-03 04:08:03,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7956 states, 7955 states have (on average 1.4681332495285984) internal successors, (11679), 7955 states have internal predecessors, (11679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:03,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7956 states to 7956 states and 11679 transitions. [2021-11-03 04:08:03,213 INFO L78 Accepts]: Start accepts. Automaton has 7956 states and 11679 transitions. Word has length 68 [2021-11-03 04:08:03,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:03,214 INFO L470 AbstractCegarLoop]: Abstraction has 7956 states and 11679 transitions. [2021-11-03 04:08:03,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 7956 states and 11679 transitions. [2021-11-03 04:08:03,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:08:03,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:03,217 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] [2021-11-03 04:08:03,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 04:08:03,217 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:03,218 INFO L85 PathProgramCache]: Analyzing trace with hash -771034997, now seen corresponding path program 1 times [2021-11-03 04:08:03,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:08:03,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113468760] [2021-11-03 04:08:03,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:03,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:08:03,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:04,237 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:08:04,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113468760] [2021-11-03 04:08:04,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113468760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:04,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:04,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-03 04:08:04,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899466738] [2021-11-03 04:08:04,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 04:08:04,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:08:04,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 04:08:04,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-03 04:08:04,239 INFO L87 Difference]: Start difference. First operand 7956 states and 11679 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:06,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:06,871 INFO L93 Difference]: Finished difference Result 15362 states and 22455 transitions. [2021-11-03 04:08:06,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 04:08:06,872 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-03 04:08:06,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:06,955 INFO L225 Difference]: With dead ends: 15362 [2021-11-03 04:08:06,955 INFO L226 Difference]: Without dead ends: 15360 [2021-11-03 04:08:06,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-11-03 04:08:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15360 states. [2021-11-03 04:08:08,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15360 to 12609. [2021-11-03 04:08:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12609 states, 12608 states have (on average 1.460977157360406) internal successors, (18420), 12608 states have internal predecessors, (18420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:08,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12609 states to 12609 states and 18420 transitions. [2021-11-03 04:08:08,076 INFO L78 Accepts]: Start accepts. Automaton has 12609 states and 18420 transitions. Word has length 69 [2021-11-03 04:08:08,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:08,077 INFO L470 AbstractCegarLoop]: Abstraction has 12609 states and 18420 transitions. [2021-11-03 04:08:08,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:08,077 INFO L276 IsEmpty]: Start isEmpty. Operand 12609 states and 18420 transitions. [2021-11-03 04:08:08,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:08:08,078 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:08,079 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] [2021-11-03 04:08:08,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 04:08:08,079 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:08,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:08,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1845146731, now seen corresponding path program 1 times [2021-11-03 04:08:08,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:08:08,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661233827] [2021-11-03 04:08:08,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:08,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:08:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:09,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:08:09,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661233827] [2021-11-03 04:08:09,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661233827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:09,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:09,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-03 04:08:09,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683375925] [2021-11-03 04:08:09,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-03 04:08:09,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:08:09,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-03 04:08:09,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-11-03 04:08:09,440 INFO L87 Difference]: Start difference. First operand 12609 states and 18420 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:14,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:14,541 INFO L93 Difference]: Finished difference Result 22304 states and 32471 transitions. [2021-11-03 04:08:14,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 04:08:14,542 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-03 04:08:14,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:14,599 INFO L225 Difference]: With dead ends: 22304 [2021-11-03 04:08:14,599 INFO L226 Difference]: Without dead ends: 20350 [2021-11-03 04:08:14,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2021-11-03 04:08:14,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20350 states. [2021-11-03 04:08:15,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20350 to 12632. [2021-11-03 04:08:15,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12632 states, 12631 states have (on average 1.460533607790357) internal successors, (18448), 12631 states have internal predecessors, (18448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:15,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12632 states to 12632 states and 18448 transitions. [2021-11-03 04:08:15,611 INFO L78 Accepts]: Start accepts. Automaton has 12632 states and 18448 transitions. Word has length 69 [2021-11-03 04:08:15,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:15,612 INFO L470 AbstractCegarLoop]: Abstraction has 12632 states and 18448 transitions. [2021-11-03 04:08:15,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:15,613 INFO L276 IsEmpty]: Start isEmpty. Operand 12632 states and 18448 transitions. [2021-11-03 04:08:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:08:15,614 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:15,614 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] [2021-11-03 04:08:15,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 04:08:15,615 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1916944309, now seen corresponding path program 1 times [2021-11-03 04:08:15,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:08:15,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718596473] [2021-11-03 04:08:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:15,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:08:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:17,066 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:08:17,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718596473] [2021-11-03 04:08:17,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718596473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:17,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:17,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-11-03 04:08:17,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773101477] [2021-11-03 04:08:17,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-03 04:08:17,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:08:17,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-03 04:08:17,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-11-03 04:08:17,069 INFO L87 Difference]: Start difference. First operand 12632 states and 18448 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:21,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:21,167 INFO L93 Difference]: Finished difference Result 15779 states and 22960 transitions. [2021-11-03 04:08:21,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 04:08:21,168 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-03 04:08:21,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:21,212 INFO L225 Difference]: With dead ends: 15779 [2021-11-03 04:08:21,213 INFO L226 Difference]: Without dead ends: 15777 [2021-11-03 04:08:21,219 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=281, Invalid=1125, Unknown=0, NotChecked=0, Total=1406 [2021-11-03 04:08:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15777 states. [2021-11-03 04:08:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15777 to 12650. [2021-11-03 04:08:22,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12650 states, 12649 states have (on average 1.4600363665111866) internal successors, (18468), 12649 states have internal predecessors, (18468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12650 states to 12650 states and 18468 transitions. [2021-11-03 04:08:22,439 INFO L78 Accepts]: Start accepts. Automaton has 12650 states and 18468 transitions. Word has length 69 [2021-11-03 04:08:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:22,440 INFO L470 AbstractCegarLoop]: Abstraction has 12650 states and 18468 transitions. [2021-11-03 04:08:22,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:22,441 INFO L276 IsEmpty]: Start isEmpty. Operand 12650 states and 18468 transitions. [2021-11-03 04:08:22,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:08:22,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:22,443 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] [2021-11-03 04:08:22,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 04:08:22,444 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:22,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:22,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2111933269, now seen corresponding path program 1 times [2021-11-03 04:08:22,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:08:22,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880931995] [2021-11-03 04:08:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:22,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:08:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:23,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:08:23,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880931995] [2021-11-03 04:08:23,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880931995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:23,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:23,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-03 04:08:23,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728164973] [2021-11-03 04:08:23,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 04:08:23,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:08:23,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 04:08:23,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-03 04:08:23,277 INFO L87 Difference]: Start difference. First operand 12650 states and 18468 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:25,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:25,827 INFO L93 Difference]: Finished difference Result 22652 states and 33081 transitions. [2021-11-03 04:08:25,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 04:08:25,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-03 04:08:25,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:25,871 INFO L225 Difference]: With dead ends: 22652 [2021-11-03 04:08:25,872 INFO L226 Difference]: Without dead ends: 22650 [2021-11-03 04:08:25,879 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-11-03 04:08:25,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22650 states. [2021-11-03 04:08:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22650 to 14308. [2021-11-03 04:08:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14308 states, 14307 states have (on average 1.4603341021877403) internal successors, (20893), 14307 states have internal predecessors, (20893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:27,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14308 states to 14308 states and 20893 transitions. [2021-11-03 04:08:27,272 INFO L78 Accepts]: Start accepts. Automaton has 14308 states and 20893 transitions. Word has length 69 [2021-11-03 04:08:27,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:27,273 INFO L470 AbstractCegarLoop]: Abstraction has 14308 states and 20893 transitions. [2021-11-03 04:08:27,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:27,273 INFO L276 IsEmpty]: Start isEmpty. Operand 14308 states and 20893 transitions. [2021-11-03 04:08:27,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 04:08:27,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:27,276 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] [2021-11-03 04:08:27,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 04:08:27,277 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:27,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:27,278 INFO L85 PathProgramCache]: Analyzing trace with hash 73744587, now seen corresponding path program 1 times [2021-11-03 04:08:27,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:08:27,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694064003] [2021-11-03 04:08:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:27,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:08:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:28,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:08:28,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694064003] [2021-11-03 04:08:28,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694064003] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:28,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:28,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-03 04:08:28,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031061189] [2021-11-03 04:08:28,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 04:08:28,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:08:28,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 04:08:28,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-11-03 04:08:28,041 INFO L87 Difference]: Start difference. First operand 14308 states and 20893 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:31,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:31,372 INFO L93 Difference]: Finished difference Result 26785 states and 39190 transitions. [2021-11-03 04:08:31,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-03 04:08:31,372 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-11-03 04:08:31,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:31,413 INFO L225 Difference]: With dead ends: 26785 [2021-11-03 04:08:31,413 INFO L226 Difference]: Without dead ends: 26783 [2021-11-03 04:08:31,421 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2021-11-03 04:08:31,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26783 states. [2021-11-03 04:08:32,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26783 to 15835. [2021-11-03 04:08:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15835 states, 15834 states have (on average 1.4613489958317545) internal successors, (23139), 15834 states have internal predecessors, (23139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:32,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15835 states to 15835 states and 23139 transitions. [2021-11-03 04:08:32,779 INFO L78 Accepts]: Start accepts. Automaton has 15835 states and 23139 transitions. Word has length 69 [2021-11-03 04:08:32,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:32,779 INFO L470 AbstractCegarLoop]: Abstraction has 15835 states and 23139 transitions. [2021-11-03 04:08:32,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 15835 states and 23139 transitions. [2021-11-03 04:08:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:08:32,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:32,782 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] [2021-11-03 04:08:32,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 04:08:32,782 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:32,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:32,783 INFO L85 PathProgramCache]: Analyzing trace with hash 671206111, now seen corresponding path program 1 times [2021-11-03 04:08:32,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:08:32,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126990054] [2021-11-03 04:08:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:32,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:08:32,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:34,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:08:34,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126990054] [2021-11-03 04:08:34,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126990054] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:34,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:34,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-03 04:08:34,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259753363] [2021-11-03 04:08:34,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-03 04:08:34,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:08:34,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-03 04:08:34,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-11-03 04:08:34,048 INFO L87 Difference]: Start difference. First operand 15835 states and 23139 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:37,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:37,714 INFO L93 Difference]: Finished difference Result 21073 states and 30711 transitions. [2021-11-03 04:08:37,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 04:08:37,715 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 04:08:37,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:37,745 INFO L225 Difference]: With dead ends: 21073 [2021-11-03 04:08:37,745 INFO L226 Difference]: Without dead ends: 19087 [2021-11-03 04:08:37,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2021-11-03 04:08:37,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19087 states. [2021-11-03 04:08:39,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19087 to 17643. [2021-11-03 04:08:39,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17643 states, 17642 states have (on average 1.4590749348146468) internal successors, (25741), 17642 states have internal predecessors, (25741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17643 states to 17643 states and 25741 transitions. [2021-11-03 04:08:39,391 INFO L78 Accepts]: Start accepts. Automaton has 17643 states and 25741 transitions. Word has length 71 [2021-11-03 04:08:39,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:39,392 INFO L470 AbstractCegarLoop]: Abstraction has 17643 states and 25741 transitions. [2021-11-03 04:08:39,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:39,392 INFO L276 IsEmpty]: Start isEmpty. Operand 17643 states and 25741 transitions. [2021-11-03 04:08:39,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:08:39,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:39,394 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] [2021-11-03 04:08:39,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-03 04:08:39,394 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:39,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:39,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1204082367, now seen corresponding path program 1 times [2021-11-03 04:08:39,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:08:39,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302517648] [2021-11-03 04:08:39,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:39,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:08:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:40,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:08:40,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302517648] [2021-11-03 04:08:40,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302517648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:40,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:40,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-03 04:08:40,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173224498] [2021-11-03 04:08:40,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-03 04:08:40,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:08:40,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-03 04:08:40,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-11-03 04:08:40,636 INFO L87 Difference]: Start difference. First operand 17643 states and 25741 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:44,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:44,563 INFO L93 Difference]: Finished difference Result 22766 states and 33079 transitions. [2021-11-03 04:08:44,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-03 04:08:44,563 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 04:08:44,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:44,607 INFO L225 Difference]: With dead ends: 22766 [2021-11-03 04:08:44,607 INFO L226 Difference]: Without dead ends: 22764 [2021-11-03 04:08:44,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=320, Invalid=1320, Unknown=0, NotChecked=0, Total=1640 [2021-11-03 04:08:44,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22764 states. [2021-11-03 04:08:46,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22764 to 17649. [2021-11-03 04:08:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17649 states, 17648 states have (on average 1.4589755213055304) internal successors, (25748), 17648 states have internal predecessors, (25748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17649 states to 17649 states and 25748 transitions. [2021-11-03 04:08:46,310 INFO L78 Accepts]: Start accepts. Automaton has 17649 states and 25748 transitions. Word has length 71 [2021-11-03 04:08:46,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:46,310 INFO L470 AbstractCegarLoop]: Abstraction has 17649 states and 25748 transitions. [2021-11-03 04:08:46,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:46,310 INFO L276 IsEmpty]: Start isEmpty. Operand 17649 states and 25748 transitions. [2021-11-03 04:08:46,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:08:46,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:46,313 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] [2021-11-03 04:08:46,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-03 04:08:46,313 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:46,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:46,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1496112481, now seen corresponding path program 1 times [2021-11-03 04:08:46,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:08:46,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619685261] [2021-11-03 04:08:46,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:46,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:08:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:47,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:08:47,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619685261] [2021-11-03 04:08:47,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619685261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:47,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:47,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-03 04:08:47,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734687390] [2021-11-03 04:08:47,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-03 04:08:47,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:08:47,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-03 04:08:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-11-03 04:08:47,910 INFO L87 Difference]: Start difference. First operand 17649 states and 25748 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:08:53,423 INFO L93 Difference]: Finished difference Result 22777 states and 33091 transitions. [2021-11-03 04:08:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-03 04:08:53,423 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 04:08:53,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:08:53,457 INFO L225 Difference]: With dead ends: 22777 [2021-11-03 04:08:53,457 INFO L226 Difference]: Without dead ends: 22775 [2021-11-03 04:08:53,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=331, Invalid=1391, Unknown=0, NotChecked=0, Total=1722 [2021-11-03 04:08:53,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22775 states. [2021-11-03 04:08:55,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22775 to 18644. [2021-11-03 04:08:55,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18644 states, 18643 states have (on average 1.4568470739687818) internal successors, (27160), 18643 states have internal predecessors, (27160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:55,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18644 states to 18644 states and 27160 transitions. [2021-11-03 04:08:55,224 INFO L78 Accepts]: Start accepts. Automaton has 18644 states and 27160 transitions. Word has length 71 [2021-11-03 04:08:55,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:08:55,224 INFO L470 AbstractCegarLoop]: Abstraction has 18644 states and 27160 transitions. [2021-11-03 04:08:55,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:08:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 18644 states and 27160 transitions. [2021-11-03 04:08:55,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:08:55,226 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:08:55,226 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] [2021-11-03 04:08:55,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-03 04:08:55,227 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:08:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:08:55,227 INFO L85 PathProgramCache]: Analyzing trace with hash -2058026209, now seen corresponding path program 1 times [2021-11-03 04:08:55,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:08:55,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073174355] [2021-11-03 04:08:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:08:55,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:08:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:08:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:08:56,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:08:56,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073174355] [2021-11-03 04:08:56,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073174355] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:08:56,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:08:56,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-03 04:08:56,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288950021] [2021-11-03 04:08:56,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-03 04:08:56,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:08:56,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-03 04:08:56,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-03 04:08:56,080 INFO L87 Difference]: Start difference. First operand 18644 states and 27160 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:00,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:09:00,009 INFO L93 Difference]: Finished difference Result 30715 states and 44687 transitions. [2021-11-03 04:09:00,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 04:09:00,009 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 04:09:00,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:09:00,061 INFO L225 Difference]: With dead ends: 30715 [2021-11-03 04:09:00,061 INFO L226 Difference]: Without dead ends: 30713 [2021-11-03 04:09:00,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-11-03 04:09:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30713 states. [2021-11-03 04:09:01,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30713 to 18660. [2021-11-03 04:09:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18660 states, 18659 states have (on average 1.4566697036282759) internal successors, (27180), 18659 states have internal predecessors, (27180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:01,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18660 states to 18660 states and 27180 transitions. [2021-11-03 04:09:01,926 INFO L78 Accepts]: Start accepts. Automaton has 18660 states and 27180 transitions. Word has length 71 [2021-11-03 04:09:01,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:09:01,927 INFO L470 AbstractCegarLoop]: Abstraction has 18660 states and 27180 transitions. [2021-11-03 04:09:01,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:01,927 INFO L276 IsEmpty]: Start isEmpty. Operand 18660 states and 27180 transitions. [2021-11-03 04:09:01,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:09:01,929 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:09:01,929 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] [2021-11-03 04:09:01,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-03 04:09:01,930 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:09:01,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:09:01,931 INFO L85 PathProgramCache]: Analyzing trace with hash 558155519, now seen corresponding path program 1 times [2021-11-03 04:09:01,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:09:01,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870398077] [2021-11-03 04:09:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:09:01,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:09:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:09:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:02,786 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:09:02,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870398077] [2021-11-03 04:09:02,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870398077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:09:02,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:09:02,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-03 04:09:02,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922162731] [2021-11-03 04:09:02,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-03 04:09:02,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:09:02,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-03 04:09:02,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-03 04:09:02,791 INFO L87 Difference]: Start difference. First operand 18660 states and 27180 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:06,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:09:06,612 INFO L93 Difference]: Finished difference Result 35900 states and 52290 transitions. [2021-11-03 04:09:06,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 04:09:06,613 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 04:09:06,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:09:06,657 INFO L225 Difference]: With dead ends: 35900 [2021-11-03 04:09:06,657 INFO L226 Difference]: Without dead ends: 31930 [2021-11-03 04:09:06,673 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-11-03 04:09:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31930 states. [2021-11-03 04:09:08,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31930 to 22044. [2021-11-03 04:09:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22044 states, 22043 states have (on average 1.4547475389012385) internal successors, (32067), 22043 states have internal predecessors, (32067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22044 states to 22044 states and 32067 transitions. [2021-11-03 04:09:08,846 INFO L78 Accepts]: Start accepts. Automaton has 22044 states and 32067 transitions. Word has length 71 [2021-11-03 04:09:08,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:09:08,846 INFO L470 AbstractCegarLoop]: Abstraction has 22044 states and 32067 transitions. [2021-11-03 04:09:08,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 22044 states and 32067 transitions. [2021-11-03 04:09:08,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:09:08,848 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:09:08,848 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] [2021-11-03 04:09:08,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-03 04:09:08,849 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:09:08,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:09:08,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1091031775, now seen corresponding path program 1 times [2021-11-03 04:09:08,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:09:08,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485120592] [2021-11-03 04:09:08,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:09:08,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:09:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:09:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:09,948 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:09:09,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485120592] [2021-11-03 04:09:09,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485120592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:09:09,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:09:09,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-03 04:09:09,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247144741] [2021-11-03 04:09:09,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-03 04:09:09,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:09:09,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-03 04:09:09,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-11-03 04:09:09,950 INFO L87 Difference]: Start difference. First operand 22044 states and 32067 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:16,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:09:16,480 INFO L93 Difference]: Finished difference Result 49373 states and 71809 transitions. [2021-11-03 04:09:16,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-03 04:09:16,481 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 04:09:16,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:09:16,557 INFO L225 Difference]: With dead ends: 49373 [2021-11-03 04:09:16,557 INFO L226 Difference]: Without dead ends: 49371 [2021-11-03 04:09:16,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2021-11-03 04:09:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49371 states. [2021-11-03 04:09:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49371 to 22062. [2021-11-03 04:09:18,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22062 states, 22061 states have (on average 1.454512488101174) internal successors, (32088), 22061 states have internal predecessors, (32088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22062 states to 22062 states and 32088 transitions. [2021-11-03 04:09:18,917 INFO L78 Accepts]: Start accepts. Automaton has 22062 states and 32088 transitions. Word has length 71 [2021-11-03 04:09:18,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:09:18,917 INFO L470 AbstractCegarLoop]: Abstraction has 22062 states and 32088 transitions. [2021-11-03 04:09:18,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:18,918 INFO L276 IsEmpty]: Start isEmpty. Operand 22062 states and 32088 transitions. [2021-11-03 04:09:18,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:09:18,919 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:09:18,919 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] [2021-11-03 04:09:18,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-03 04:09:18,920 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:09:18,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:09:18,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1860614337, now seen corresponding path program 1 times [2021-11-03 04:09:18,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:09:18,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880592210] [2021-11-03 04:09:18,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:09:18,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:09:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:09:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:19,537 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:09:19,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880592210] [2021-11-03 04:09:19,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880592210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:09:19,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:09:19,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-03 04:09:19,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462075777] [2021-11-03 04:09:19,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-03 04:09:19,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:09:19,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-03 04:09:19,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-03 04:09:19,539 INFO L87 Difference]: Start difference. First operand 22062 states and 32088 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:24,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:09:24,175 INFO L93 Difference]: Finished difference Result 40873 states and 59574 transitions. [2021-11-03 04:09:24,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 04:09:24,176 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 04:09:24,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:09:24,238 INFO L225 Difference]: With dead ends: 40873 [2021-11-03 04:09:24,238 INFO L226 Difference]: Without dead ends: 40871 [2021-11-03 04:09:24,250 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-11-03 04:09:24,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40871 states. [2021-11-03 04:09:26,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40871 to 22068. [2021-11-03 04:09:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22068 states, 22067 states have (on average 1.4544342230479903) internal successors, (32095), 22067 states have internal predecessors, (32095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22068 states to 22068 states and 32095 transitions. [2021-11-03 04:09:26,666 INFO L78 Accepts]: Start accepts. Automaton has 22068 states and 32095 transitions. Word has length 71 [2021-11-03 04:09:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:09:26,666 INFO L470 AbstractCegarLoop]: Abstraction has 22068 states and 32095 transitions. [2021-11-03 04:09:26,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:26,667 INFO L276 IsEmpty]: Start isEmpty. Operand 22068 states and 32095 transitions. [2021-11-03 04:09:26,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:09:26,668 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:09:26,669 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] [2021-11-03 04:09:26,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-03 04:09:26,669 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:09:26,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:09:26,670 INFO L85 PathProgramCache]: Analyzing trace with hash 755567391, now seen corresponding path program 1 times [2021-11-03 04:09:26,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:09:26,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822256382] [2021-11-03 04:09:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:09:26,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:09:26,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:09:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:27,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:09:27,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822256382] [2021-11-03 04:09:27,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822256382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:09:27,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:09:27,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-03 04:09:27,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768172251] [2021-11-03 04:09:27,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-03 04:09:27,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:09:27,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-03 04:09:27,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-03 04:09:27,312 INFO L87 Difference]: Start difference. First operand 22068 states and 32095 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:31,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:09:31,882 INFO L93 Difference]: Finished difference Result 45116 states and 65733 transitions. [2021-11-03 04:09:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-03 04:09:31,883 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 04:09:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:09:31,949 INFO L225 Difference]: With dead ends: 45116 [2021-11-03 04:09:31,949 INFO L226 Difference]: Without dead ends: 41146 [2021-11-03 04:09:31,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-11-03 04:09:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41146 states. [2021-11-03 04:09:34,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41146 to 23589. [2021-11-03 04:09:34,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23589 states, 23588 states have (on average 1.4540868238087163) internal successors, (34299), 23588 states have internal predecessors, (34299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23589 states to 23589 states and 34299 transitions. [2021-11-03 04:09:34,673 INFO L78 Accepts]: Start accepts. Automaton has 23589 states and 34299 transitions. Word has length 71 [2021-11-03 04:09:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:09:34,673 INFO L470 AbstractCegarLoop]: Abstraction has 23589 states and 34299 transitions. [2021-11-03 04:09:34,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:34,673 INFO L276 IsEmpty]: Start isEmpty. Operand 23589 states and 34299 transitions. [2021-11-03 04:09:34,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:09:34,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:09:34,675 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] [2021-11-03 04:09:34,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-03 04:09:34,676 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:09:34,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:09:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1288443647, now seen corresponding path program 1 times [2021-11-03 04:09:34,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:09:34,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968379866] [2021-11-03 04:09:34,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:09:34,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:09:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:09:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:35,349 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:09:35,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968379866] [2021-11-03 04:09:35,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968379866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:09:35,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:09:35,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-11-03 04:09:35,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320074654] [2021-11-03 04:09:35,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-03 04:09:35,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:09:35,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-03 04:09:35,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-11-03 04:09:35,355 INFO L87 Difference]: Start difference. First operand 23589 states and 34299 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:40,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:09:40,653 INFO L93 Difference]: Finished difference Result 42113 states and 61275 transitions. [2021-11-03 04:09:40,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-03 04:09:40,654 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 04:09:40,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:09:40,714 INFO L225 Difference]: With dead ends: 42113 [2021-11-03 04:09:40,714 INFO L226 Difference]: Without dead ends: 42111 [2021-11-03 04:09:40,724 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-11-03 04:09:40,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42111 states. [2021-11-03 04:09:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42111 to 23596. [2021-11-03 04:09:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23596 states, 23595 states have (on average 1.4540368722186905) internal successors, (34308), 23595 states have internal predecessors, (34308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23596 states to 23596 states and 34308 transitions. [2021-11-03 04:09:43,542 INFO L78 Accepts]: Start accepts. Automaton has 23596 states and 34308 transitions. Word has length 71 [2021-11-03 04:09:43,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:09:43,542 INFO L470 AbstractCegarLoop]: Abstraction has 23596 states and 34308 transitions. [2021-11-03 04:09:43,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:43,543 INFO L276 IsEmpty]: Start isEmpty. Operand 23596 states and 34308 transitions. [2021-11-03 04:09:43,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 04:09:43,544 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:09:43,544 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] [2021-11-03 04:09:43,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-03 04:09:43,544 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:09:43,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:09:43,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1093454687, now seen corresponding path program 1 times [2021-11-03 04:09:43,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:09:43,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386550609] [2021-11-03 04:09:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:09:43,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:09:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:09:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:44,653 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:09:44,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386550609] [2021-11-03 04:09:44,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386550609] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:09:44,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:09:44,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-11-03 04:09:44,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771245188] [2021-11-03 04:09:44,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-03 04:09:44,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:09:44,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-03 04:09:44,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-11-03 04:09:44,655 INFO L87 Difference]: Start difference. First operand 23596 states and 34308 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:52,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:09:52,195 INFO L93 Difference]: Finished difference Result 41189 states and 60030 transitions. [2021-11-03 04:09:52,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-03 04:09:52,196 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-03 04:09:52,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:09:52,257 INFO L225 Difference]: With dead ends: 41189 [2021-11-03 04:09:52,258 INFO L226 Difference]: Without dead ends: 41187 [2021-11-03 04:09:52,270 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2021-11-03 04:09:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41187 states. [2021-11-03 04:09:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41187 to 23611. [2021-11-03 04:09:55,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23611 states, 23610 states have (on average 1.454002541296061) internal successors, (34329), 23610 states have internal predecessors, (34329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:55,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23611 states to 23611 states and 34329 transitions. [2021-11-03 04:09:55,362 INFO L78 Accepts]: Start accepts. Automaton has 23611 states and 34329 transitions. Word has length 71 [2021-11-03 04:09:55,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:09:55,363 INFO L470 AbstractCegarLoop]: Abstraction has 23611 states and 34329 transitions. [2021-11-03 04:09:55,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 23 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:55,363 INFO L276 IsEmpty]: Start isEmpty. Operand 23611 states and 34329 transitions. [2021-11-03 04:09:55,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-03 04:09:55,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:09:55,365 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] [2021-11-03 04:09:55,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-03 04:09:55,365 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:09:55,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:09:55,366 INFO L85 PathProgramCache]: Analyzing trace with hash -918898757, now seen corresponding path program 1 times [2021-11-03 04:09:55,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:09:55,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459766539] [2021-11-03 04:09:55,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:09:55,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:09:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:09:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:09:55,402 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:09:55,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459766539] [2021-11-03 04:09:55,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459766539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:09:55,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:09:55,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:09:55,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665071113] [2021-11-03 04:09:55,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:09:55,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:09:55,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:09:55,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:09:55,404 INFO L87 Difference]: Start difference. First operand 23611 states and 34329 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:09:58,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:09:58,793 INFO L93 Difference]: Finished difference Result 45337 states and 66151 transitions. [2021-11-03 04:09:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:09:58,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-03 04:09:58,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:09:58,825 INFO L225 Difference]: With dead ends: 45337 [2021-11-03 04:09:58,826 INFO L226 Difference]: Without dead ends: 23051 [2021-11-03 04:09:58,850 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 [2021-11-03 04:09:58,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23051 states. [2021-11-03 04:10:01,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23051 to 22919. [2021-11-03 04:10:01,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22919 states, 22918 states have (on average 1.4525263984640893) internal successors, (33289), 22918 states have internal predecessors, (33289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22919 states to 22919 states and 33289 transitions. [2021-11-03 04:10:01,862 INFO L78 Accepts]: Start accepts. Automaton has 22919 states and 33289 transitions. Word has length 72 [2021-11-03 04:10:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:01,862 INFO L470 AbstractCegarLoop]: Abstraction has 22919 states and 33289 transitions. [2021-11-03 04:10:01,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:01,863 INFO L276 IsEmpty]: Start isEmpty. Operand 22919 states and 33289 transitions. [2021-11-03 04:10:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-03 04:10:01,864 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:01,865 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] [2021-11-03 04:10:01,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-03 04:10:01,865 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:01,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:01,866 INFO L85 PathProgramCache]: Analyzing trace with hash -174301602, now seen corresponding path program 1 times [2021-11-03 04:10:01,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:10:01,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469708682] [2021-11-03 04:10:01,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:01,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:10:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:01,900 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:10:01,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469708682] [2021-11-03 04:10:01,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469708682] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:01,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:01,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:10:01,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067208713] [2021-11-03 04:10:01,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:10:01,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:10:01,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:10:01,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:10:01,902 INFO L87 Difference]: Start difference. First operand 22919 states and 33289 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:04,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:04,838 INFO L93 Difference]: Finished difference Result 41572 states and 60539 transitions. [2021-11-03 04:10:04,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:10:04,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-03 04:10:04,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:04,875 INFO L225 Difference]: With dead ends: 41572 [2021-11-03 04:10:04,875 INFO L226 Difference]: Without dead ends: 22222 [2021-11-03 04:10:04,901 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 [2021-11-03 04:10:04,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22222 states. [2021-11-03 04:10:07,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22222 to 22220. [2021-11-03 04:10:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22220 states, 22219 states have (on average 1.4510103965074936) internal successors, (32240), 22219 states have internal predecessors, (32240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:07,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22220 states to 22220 states and 32240 transitions. [2021-11-03 04:10:07,861 INFO L78 Accepts]: Start accepts. Automaton has 22220 states and 32240 transitions. Word has length 72 [2021-11-03 04:10:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:07,861 INFO L470 AbstractCegarLoop]: Abstraction has 22220 states and 32240 transitions. [2021-11-03 04:10:07,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:07,862 INFO L276 IsEmpty]: Start isEmpty. Operand 22220 states and 32240 transitions. [2021-11-03 04:10:07,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-03 04:10:07,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:07,863 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] [2021-11-03 04:10:07,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-03 04:10:07,864 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:07,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:07,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1113496841, now seen corresponding path program 1 times [2021-11-03 04:10:07,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:10:07,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24256205] [2021-11-03 04:10:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:07,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:10:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:07,898 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:10:07,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24256205] [2021-11-03 04:10:07,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24256205] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:07,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:07,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:10:07,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764107590] [2021-11-03 04:10:07,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:10:07,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:10:07,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:10:07,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:10:07,900 INFO L87 Difference]: Start difference. First operand 22220 states and 32240 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:10,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:10,553 INFO L93 Difference]: Finished difference Result 38555 states and 56112 transitions. [2021-11-03 04:10:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:10:10,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-03 04:10:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:10,587 INFO L225 Difference]: With dead ends: 38555 [2021-11-03 04:10:10,587 INFO L226 Difference]: Without dead ends: 20197 [2021-11-03 04:10:10,609 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 [2021-11-03 04:10:10,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20197 states. [2021-11-03 04:10:13,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20197 to 20195. [2021-11-03 04:10:13,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20195 states, 20194 states have (on average 1.4484995543230663) internal successors, (29251), 20194 states have internal predecessors, (29251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20195 states to 20195 states and 29251 transitions. [2021-11-03 04:10:13,384 INFO L78 Accepts]: Start accepts. Automaton has 20195 states and 29251 transitions. Word has length 72 [2021-11-03 04:10:13,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:13,384 INFO L470 AbstractCegarLoop]: Abstraction has 20195 states and 29251 transitions. [2021-11-03 04:10:13,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 20195 states and 29251 transitions. [2021-11-03 04:10:13,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-03 04:10:13,386 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:13,386 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] [2021-11-03 04:10:13,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-03 04:10:13,386 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:13,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:13,386 INFO L85 PathProgramCache]: Analyzing trace with hash -843250868, now seen corresponding path program 1 times [2021-11-03 04:10:13,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:10:13,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562243033] [2021-11-03 04:10:13,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:13,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:10:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:13,420 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:10:13,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562243033] [2021-11-03 04:10:13,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562243033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:13,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:13,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:10:13,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272051022] [2021-11-03 04:10:13,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:10:13,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:10:13,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:10:13,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:10:13,423 INFO L87 Difference]: Start difference. First operand 20195 states and 29251 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:16,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:16,249 INFO L93 Difference]: Finished difference Result 35768 states and 51967 transitions. [2021-11-03 04:10:16,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:10:16,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-03 04:10:16,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:16,275 INFO L225 Difference]: With dead ends: 35768 [2021-11-03 04:10:16,275 INFO L226 Difference]: Without dead ends: 19520 [2021-11-03 04:10:16,290 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 [2021-11-03 04:10:16,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19520 states. [2021-11-03 04:10:18,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19520 to 19518. [2021-11-03 04:10:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19518 states, 19517 states have (on average 1.4472511144130757) internal successors, (28246), 19517 states have internal predecessors, (28246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19518 states to 19518 states and 28246 transitions. [2021-11-03 04:10:18,930 INFO L78 Accepts]: Start accepts. Automaton has 19518 states and 28246 transitions. Word has length 72 [2021-11-03 04:10:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:18,931 INFO L470 AbstractCegarLoop]: Abstraction has 19518 states and 28246 transitions. [2021-11-03 04:10:18,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:18,931 INFO L276 IsEmpty]: Start isEmpty. Operand 19518 states and 28246 transitions. [2021-11-03 04:10:18,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-03 04:10:18,932 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:18,932 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] [2021-11-03 04:10:18,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-03 04:10:18,932 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:18,933 INFO L85 PathProgramCache]: Analyzing trace with hash 123291119, now seen corresponding path program 1 times [2021-11-03 04:10:18,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:10:18,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607848294] [2021-11-03 04:10:18,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:18,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:10:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:18,965 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:10:18,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607848294] [2021-11-03 04:10:18,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607848294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:18,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:18,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:10:18,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206231862] [2021-11-03 04:10:18,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:10:18,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:10:18,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:10:18,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:10:18,968 INFO L87 Difference]: Start difference. First operand 19518 states and 28246 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:21,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:21,478 INFO L93 Difference]: Finished difference Result 33896 states and 49181 transitions. [2021-11-03 04:10:21,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:10:21,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-11-03 04:10:21,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:21,508 INFO L225 Difference]: With dead ends: 33896 [2021-11-03 04:10:21,508 INFO L226 Difference]: Without dead ends: 18742 [2021-11-03 04:10:21,531 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 [2021-11-03 04:10:21,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18742 states. [2021-11-03 04:10:24,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18742 to 18740. [2021-11-03 04:10:24,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18740 states, 18739 states have (on average 1.4458082074817227) internal successors, (27093), 18739 states have internal predecessors, (27093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18740 states to 18740 states and 27093 transitions. [2021-11-03 04:10:24,406 INFO L78 Accepts]: Start accepts. Automaton has 18740 states and 27093 transitions. Word has length 72 [2021-11-03 04:10:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:24,407 INFO L470 AbstractCegarLoop]: Abstraction has 18740 states and 27093 transitions. [2021-11-03 04:10:24,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 18740 states and 27093 transitions. [2021-11-03 04:10:24,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:10:24,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:24,408 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] [2021-11-03 04:10:24,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-03 04:10:24,408 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:24,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:24,409 INFO L85 PathProgramCache]: Analyzing trace with hash -76649453, now seen corresponding path program 1 times [2021-11-03 04:10:24,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:10:24,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57801547] [2021-11-03 04:10:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:24,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:10:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:26,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:10:26,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57801547] [2021-11-03 04:10:26,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57801547] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:26,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:26,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-03 04:10:26,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701443072] [2021-11-03 04:10:26,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-03 04:10:26,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:10:26,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-03 04:10:26,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-11-03 04:10:26,933 INFO L87 Difference]: Start difference. First operand 18740 states and 27093 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:34,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:34,999 INFO L93 Difference]: Finished difference Result 23245 states and 33489 transitions. [2021-11-03 04:10:34,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-03 04:10:34,999 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-03 04:10:34,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:35,032 INFO L225 Difference]: With dead ends: 23245 [2021-11-03 04:10:35,032 INFO L226 Difference]: Without dead ends: 23243 [2021-11-03 04:10:35,041 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=515, Invalid=2137, Unknown=0, NotChecked=0, Total=2652 [2021-11-03 04:10:35,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23243 states. [2021-11-03 04:10:37,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23243 to 18746. [2021-11-03 04:10:37,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18746 states, 18745 states have (on average 1.44571885836223) internal successors, (27100), 18745 states have internal predecessors, (27100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18746 states to 18746 states and 27100 transitions. [2021-11-03 04:10:37,867 INFO L78 Accepts]: Start accepts. Automaton has 18746 states and 27100 transitions. Word has length 73 [2021-11-03 04:10:37,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:37,868 INFO L470 AbstractCegarLoop]: Abstraction has 18746 states and 27100 transitions. [2021-11-03 04:10:37,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 18746 states and 27100 transitions. [2021-11-03 04:10:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:10:37,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:37,869 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] [2021-11-03 04:10:37,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-03 04:10:37,870 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:37,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:37,870 INFO L85 PathProgramCache]: Analyzing trace with hash 823232627, now seen corresponding path program 1 times [2021-11-03 04:10:37,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:10:37,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36906379] [2021-11-03 04:10:37,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:37,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:10:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:39,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:10:39,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36906379] [2021-11-03 04:10:39,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36906379] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:39,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:39,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-03 04:10:39,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688009737] [2021-11-03 04:10:39,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-03 04:10:39,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:10:39,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-03 04:10:39,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-11-03 04:10:39,633 INFO L87 Difference]: Start difference. First operand 18746 states and 27100 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:47,218 INFO L93 Difference]: Finished difference Result 24869 states and 35890 transitions. [2021-11-03 04:10:47,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 04:10:47,219 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-03 04:10:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:47,247 INFO L225 Difference]: With dead ends: 24869 [2021-11-03 04:10:47,247 INFO L226 Difference]: Without dead ends: 23139 [2021-11-03 04:10:47,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=396, Invalid=1674, Unknown=0, NotChecked=0, Total=2070 [2021-11-03 04:10:47,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23139 states. [2021-11-03 04:10:50,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23139 to 18752. [2021-11-03 04:10:50,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18752 states, 18751 states have (on average 1.445629566423124) internal successors, (27107), 18751 states have internal predecessors, (27107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:50,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18752 states to 18752 states and 27107 transitions. [2021-11-03 04:10:50,157 INFO L78 Accepts]: Start accepts. Automaton has 18752 states and 27107 transitions. Word has length 73 [2021-11-03 04:10:50,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:50,157 INFO L470 AbstractCegarLoop]: Abstraction has 18752 states and 27107 transitions. [2021-11-03 04:10:50,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:50,157 INFO L276 IsEmpty]: Start isEmpty. Operand 18752 states and 27107 transitions. [2021-11-03 04:10:50,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:10:50,158 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:50,158 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] [2021-11-03 04:10:50,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-03 04:10:50,159 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:50,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:50,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1356108883, now seen corresponding path program 1 times [2021-11-03 04:10:50,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:10:50,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319734740] [2021-11-03 04:10:50,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:50,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:10:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:52,296 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:10:52,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319734740] [2021-11-03 04:10:52,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319734740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:52,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:52,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-03 04:10:52,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013670157] [2021-11-03 04:10:52,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-03 04:10:52,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:10:52,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-03 04:10:52,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-11-03 04:10:52,298 INFO L87 Difference]: Start difference. First operand 18752 states and 27107 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:00,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:11:00,646 INFO L93 Difference]: Finished difference Result 23587 states and 33997 transitions. [2021-11-03 04:11:00,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-03 04:11:00,646 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-03 04:11:00,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:11:00,675 INFO L225 Difference]: With dead ends: 23587 [2021-11-03 04:11:00,675 INFO L226 Difference]: Without dead ends: 23585 [2021-11-03 04:11:00,681 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=477, Invalid=2073, Unknown=0, NotChecked=0, Total=2550 [2021-11-03 04:11:00,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23585 states. [2021-11-03 04:11:03,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23585 to 18752. [2021-11-03 04:11:03,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18752 states, 18751 states have (on average 1.445629566423124) internal successors, (27107), 18751 states have internal predecessors, (27107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18752 states to 18752 states and 27107 transitions. [2021-11-03 04:11:03,316 INFO L78 Accepts]: Start accepts. Automaton has 18752 states and 27107 transitions. Word has length 73 [2021-11-03 04:11:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:11:03,316 INFO L470 AbstractCegarLoop]: Abstraction has 18752 states and 27107 transitions. [2021-11-03 04:11:03,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:03,317 INFO L276 IsEmpty]: Start isEmpty. Operand 18752 states and 27107 transitions. [2021-11-03 04:11:03,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:11:03,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:11:03,318 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] [2021-11-03 04:11:03,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-03 04:11:03,318 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:11:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:11:03,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1344085965, now seen corresponding path program 1 times [2021-11-03 04:11:03,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:11:03,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212419345] [2021-11-03 04:11:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:11:03,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:11:03,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:11:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:11:04,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:11:04,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212419345] [2021-11-03 04:11:04,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212419345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:11:04,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:11:04,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-03 04:11:04,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554776331] [2021-11-03 04:11:04,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-03 04:11:04,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:11:04,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-03 04:11:04,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-11-03 04:11:04,167 INFO L87 Difference]: Start difference. First operand 18752 states and 27107 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:08,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:11:08,864 INFO L93 Difference]: Finished difference Result 23232 states and 33480 transitions. [2021-11-03 04:11:08,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-03 04:11:08,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-03 04:11:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:11:08,895 INFO L225 Difference]: With dead ends: 23232 [2021-11-03 04:11:08,895 INFO L226 Difference]: Without dead ends: 23230 [2021-11-03 04:11:08,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2021-11-03 04:11:08,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23230 states. [2021-11-03 04:11:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23230 to 18752. [2021-11-03 04:11:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18752 states, 18751 states have (on average 1.445629566423124) internal successors, (27107), 18751 states have internal predecessors, (27107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18752 states to 18752 states and 27107 transitions. [2021-11-03 04:11:11,692 INFO L78 Accepts]: Start accepts. Automaton has 18752 states and 27107 transitions. Word has length 73 [2021-11-03 04:11:11,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:11:11,692 INFO L470 AbstractCegarLoop]: Abstraction has 18752 states and 27107 transitions. [2021-11-03 04:11:11,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 20 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 18752 states and 27107 transitions. [2021-11-03 04:11:11,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:11:11,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:11:11,694 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] [2021-11-03 04:11:11,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-03 04:11:11,694 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:11:11,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:11:11,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1557480595, now seen corresponding path program 1 times [2021-11-03 04:11:11,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:11:11,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120344614] [2021-11-03 04:11:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:11:11,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:11:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:11:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:11:13,123 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:11:13,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120344614] [2021-11-03 04:11:13,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120344614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:11:13,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:11:13,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-11-03 04:11:13,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293001166] [2021-11-03 04:11:13,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-03 04:11:13,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:11:13,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-03 04:11:13,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-11-03 04:11:13,125 INFO L87 Difference]: Start difference. First operand 18752 states and 27107 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:19,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:11:19,741 INFO L93 Difference]: Finished difference Result 25386 states and 36622 transitions. [2021-11-03 04:11:19,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-03 04:11:19,741 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-03 04:11:19,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:11:19,772 INFO L225 Difference]: With dead ends: 25386 [2021-11-03 04:11:19,772 INFO L226 Difference]: Without dead ends: 23688 [2021-11-03 04:11:19,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=358, Invalid=1534, Unknown=0, NotChecked=0, Total=1892 [2021-11-03 04:11:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23688 states. [2021-11-03 04:11:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23688 to 18771. [2021-11-03 04:11:22,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18771 states, 18770 states have (on average 1.4452850293020778) internal successors, (27128), 18770 states have internal predecessors, (27128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18771 states to 18771 states and 27128 transitions. [2021-11-03 04:11:22,647 INFO L78 Accepts]: Start accepts. Automaton has 18771 states and 27128 transitions. Word has length 73 [2021-11-03 04:11:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:11:22,647 INFO L470 AbstractCegarLoop]: Abstraction has 18771 states and 27128 transitions. [2021-11-03 04:11:22,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 18771 states and 27128 transitions. [2021-11-03 04:11:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:11:22,648 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:11:22,648 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] [2021-11-03 04:11:22,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-03 04:11:22,648 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:11:22,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:11:22,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2090356851, now seen corresponding path program 1 times [2021-11-03 04:11:22,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:11:22,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322377748] [2021-11-03 04:11:22,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:11:22,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:11:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:11:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:11:24,389 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:11:24,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322377748] [2021-11-03 04:11:24,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322377748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:11:24,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:11:24,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-11-03 04:11:24,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900822388] [2021-11-03 04:11:24,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-03 04:11:24,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:11:24,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-03 04:11:24,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-11-03 04:11:24,392 INFO L87 Difference]: Start difference. First operand 18771 states and 27128 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:11:32,323 INFO L93 Difference]: Finished difference Result 21546 states and 31072 transitions. [2021-11-03 04:11:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-03 04:11:32,323 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-03 04:11:32,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:11:32,347 INFO L225 Difference]: With dead ends: 21546 [2021-11-03 04:11:32,347 INFO L226 Difference]: Without dead ends: 21544 [2021-11-03 04:11:32,353 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=503, Invalid=2149, Unknown=0, NotChecked=0, Total=2652 [2021-11-03 04:11:32,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21544 states. [2021-11-03 04:11:35,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21544 to 18767. [2021-11-03 04:11:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18767 states, 18766 states have (on average 1.4453266545880847) internal successors, (27123), 18766 states have internal predecessors, (27123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18767 states to 18767 states and 27123 transitions. [2021-11-03 04:11:35,144 INFO L78 Accepts]: Start accepts. Automaton has 18767 states and 27123 transitions. Word has length 73 [2021-11-03 04:11:35,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:11:35,144 INFO L470 AbstractCegarLoop]: Abstraction has 18767 states and 27123 transitions. [2021-11-03 04:11:35,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 18767 states and 27123 transitions. [2021-11-03 04:11:35,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:11:35,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:11:35,146 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] [2021-11-03 04:11:35,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-03 04:11:35,146 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:11:35,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:11:35,146 INFO L85 PathProgramCache]: Analyzing trace with hash -609837997, now seen corresponding path program 1 times [2021-11-03 04:11:35,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:11:35,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295810001] [2021-11-03 04:11:35,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:11:35,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:11:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:11:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:11:36,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:11:36,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295810001] [2021-11-03 04:11:36,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295810001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:11:36,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:11:36,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-03 04:11:36,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578765135] [2021-11-03 04:11:36,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-03 04:11:36,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:11:36,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-03 04:11:36,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-11-03 04:11:36,607 INFO L87 Difference]: Start difference. First operand 18767 states and 27123 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:43,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:11:43,620 INFO L93 Difference]: Finished difference Result 23249 states and 33497 transitions. [2021-11-03 04:11:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 04:11:43,621 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-03 04:11:43,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:11:43,771 INFO L225 Difference]: With dead ends: 23249 [2021-11-03 04:11:43,771 INFO L226 Difference]: Without dead ends: 23247 [2021-11-03 04:11:43,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=409, Invalid=1661, Unknown=0, NotChecked=0, Total=2070 [2021-11-03 04:11:43,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23247 states. [2021-11-03 04:11:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23247 to 18767. [2021-11-03 04:11:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18767 states, 18766 states have (on average 1.4453266545880847) internal successors, (27123), 18766 states have internal predecessors, (27123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18767 states to 18767 states and 27123 transitions. [2021-11-03 04:11:46,499 INFO L78 Accepts]: Start accepts. Automaton has 18767 states and 27123 transitions. Word has length 73 [2021-11-03 04:11:46,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:11:46,499 INFO L470 AbstractCegarLoop]: Abstraction has 18767 states and 27123 transitions. [2021-11-03 04:11:46,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:46,500 INFO L276 IsEmpty]: Start isEmpty. Operand 18767 states and 27123 transitions. [2021-11-03 04:11:46,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:11:46,501 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:11:46,501 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] [2021-11-03 04:11:46,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-03 04:11:46,501 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:11:46,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:11:46,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1171751725, now seen corresponding path program 1 times [2021-11-03 04:11:46,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:11:46,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053741943] [2021-11-03 04:11:46,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:11:46,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:11:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:11:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:11:48,305 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:11:48,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053741943] [2021-11-03 04:11:48,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053741943] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:11:48,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:11:48,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-11-03 04:11:48,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123402541] [2021-11-03 04:11:48,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-03 04:11:48,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:11:48,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-03 04:11:48,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-11-03 04:11:48,308 INFO L87 Difference]: Start difference. First operand 18767 states and 27123 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:56,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:11:56,495 INFO L93 Difference]: Finished difference Result 29931 states and 43325 transitions. [2021-11-03 04:11:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 04:11:56,504 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-03 04:11:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:11:56,547 INFO L225 Difference]: With dead ends: 29931 [2021-11-03 04:11:56,547 INFO L226 Difference]: Without dead ends: 29929 [2021-11-03 04:11:56,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=377, Invalid=1515, Unknown=0, NotChecked=0, Total=1892 [2021-11-03 04:11:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29929 states. [2021-11-03 04:11:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29929 to 18757. [2021-11-03 04:11:59,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18757 states, 18756 states have (on average 1.4455640861590957) internal successors, (27113), 18756 states have internal predecessors, (27113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:59,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18757 states to 18757 states and 27113 transitions. [2021-11-03 04:11:59,895 INFO L78 Accepts]: Start accepts. Automaton has 18757 states and 27113 transitions. Word has length 73 [2021-11-03 04:11:59,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:11:59,895 INFO L470 AbstractCegarLoop]: Abstraction has 18757 states and 27113 transitions. [2021-11-03 04:11:59,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:11:59,896 INFO L276 IsEmpty]: Start isEmpty. Operand 18757 states and 27113 transitions. [2021-11-03 04:11:59,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:11:59,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:11:59,897 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] [2021-11-03 04:11:59,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-03 04:11:59,897 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:11:59,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:11:59,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1444430003, now seen corresponding path program 1 times [2021-11-03 04:11:59,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:11:59,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132049451] [2021-11-03 04:11:59,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:11:59,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:11:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:12:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:12:01,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:12:01,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132049451] [2021-11-03 04:12:01,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132049451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:12:01,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:12:01,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-11-03 04:12:01,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116875808] [2021-11-03 04:12:01,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-03 04:12:01,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:12:01,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-03 04:12:01,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-11-03 04:12:01,976 INFO L87 Difference]: Start difference. First operand 18757 states and 27113 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:11,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:12:11,570 INFO L93 Difference]: Finished difference Result 27446 states and 39646 transitions. [2021-11-03 04:12:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-03 04:12:11,571 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-03 04:12:11,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:12:11,610 INFO L225 Difference]: With dead ends: 27446 [2021-11-03 04:12:11,610 INFO L226 Difference]: Without dead ends: 25748 [2021-11-03 04:12:11,621 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=659, Invalid=2881, Unknown=0, NotChecked=0, Total=3540 [2021-11-03 04:12:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25748 states. [2021-11-03 04:12:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25748 to 18757. [2021-11-03 04:12:14,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18757 states, 18756 states have (on average 1.4455640861590957) internal successors, (27113), 18756 states have internal predecessors, (27113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18757 states to 18757 states and 27113 transitions. [2021-11-03 04:12:14,673 INFO L78 Accepts]: Start accepts. Automaton has 18757 states and 27113 transitions. Word has length 73 [2021-11-03 04:12:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:12:14,673 INFO L470 AbstractCegarLoop]: Abstraction has 18757 states and 27113 transitions. [2021-11-03 04:12:14,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 18757 states and 27113 transitions. [2021-11-03 04:12:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 04:12:14,674 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:12:14,674 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] [2021-11-03 04:12:14,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-03 04:12:14,675 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:12:14,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:12:14,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1977306259, now seen corresponding path program 1 times [2021-11-03 04:12:14,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:12:14,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107787342] [2021-11-03 04:12:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:12:14,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:12:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:12:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:12:17,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:12:17,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107787342] [2021-11-03 04:12:17,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107787342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:12:17,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:12:17,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-11-03 04:12:17,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669871045] [2021-11-03 04:12:17,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-03 04:12:17,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:12:17,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-03 04:12:17,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-11-03 04:12:17,358 INFO L87 Difference]: Start difference. First operand 18757 states and 27113 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:12:28,129 INFO L93 Difference]: Finished difference Result 27636 states and 39892 transitions. [2021-11-03 04:12:28,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-03 04:12:28,130 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-03 04:12:28,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:12:28,166 INFO L225 Difference]: With dead ends: 27636 [2021-11-03 04:12:28,166 INFO L226 Difference]: Without dead ends: 27634 [2021-11-03 04:12:28,173 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=462, Invalid=1794, Unknown=0, NotChecked=0, Total=2256 [2021-11-03 04:12:28,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27634 states. [2021-11-03 04:12:31,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27634 to 18757. [2021-11-03 04:12:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18757 states, 18756 states have (on average 1.4455640861590957) internal successors, (27113), 18756 states have internal predecessors, (27113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18757 states to 18757 states and 27113 transitions. [2021-11-03 04:12:31,221 INFO L78 Accepts]: Start accepts. Automaton has 18757 states and 27113 transitions. Word has length 73 [2021-11-03 04:12:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:12:31,221 INFO L470 AbstractCegarLoop]: Abstraction has 18757 states and 27113 transitions. [2021-11-03 04:12:31,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 18757 states and 27113 transitions. [2021-11-03 04:12:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:12:31,223 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:12:31,223 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] [2021-11-03 04:12:31,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-03 04:12:31,223 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:12:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:12:31,224 INFO L85 PathProgramCache]: Analyzing trace with hash -8055641, now seen corresponding path program 1 times [2021-11-03 04:12:31,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:12:31,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947083909] [2021-11-03 04:12:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:12:31,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:12:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:12:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:12:34,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:12:34,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947083909] [2021-11-03 04:12:34,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947083909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:12:34,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:12:34,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-03 04:12:34,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969925480] [2021-11-03 04:12:34,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-03 04:12:34,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:12:34,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-03 04:12:34,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-11-03 04:12:34,744 INFO L87 Difference]: Start difference. First operand 18757 states and 27113 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:12:46,408 INFO L93 Difference]: Finished difference Result 23631 states and 34045 transitions. [2021-11-03 04:12:46,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-03 04:12:46,408 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 04:12:46,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:12:46,434 INFO L225 Difference]: With dead ends: 23631 [2021-11-03 04:12:46,434 INFO L226 Difference]: Without dead ends: 23629 [2021-11-03 04:12:46,440 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=644, Invalid=2778, Unknown=0, NotChecked=0, Total=3422 [2021-11-03 04:12:46,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23629 states. [2021-11-03 04:12:49,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23629 to 18745. [2021-11-03 04:12:49,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18745 states, 18744 states have (on average 1.445742637644046) internal successors, (27099), 18744 states have internal predecessors, (27099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:49,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18745 states to 18745 states and 27099 transitions. [2021-11-03 04:12:49,514 INFO L78 Accepts]: Start accepts. Automaton has 18745 states and 27099 transitions. Word has length 75 [2021-11-03 04:12:49,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:12:49,515 INFO L470 AbstractCegarLoop]: Abstraction has 18745 states and 27099 transitions. [2021-11-03 04:12:49,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:12:49,515 INFO L276 IsEmpty]: Start isEmpty. Operand 18745 states and 27099 transitions. [2021-11-03 04:12:49,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:12:49,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:12:49,517 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] [2021-11-03 04:12:49,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-03 04:12:49,517 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:12:49,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:12:49,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1229605063, now seen corresponding path program 1 times [2021-11-03 04:12:49,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:12:49,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831851404] [2021-11-03 04:12:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:12:49,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:12:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:12:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:12:56,051 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:12:56,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831851404] [2021-11-03 04:12:56,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831851404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:12:56,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:12:56,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-11-03 04:12:56,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340037994] [2021-11-03 04:12:56,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-03 04:12:56,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:12:56,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-03 04:12:56,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2021-11-03 04:12:56,053 INFO L87 Difference]: Start difference. First operand 18745 states and 27099 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:14,709 INFO L93 Difference]: Finished difference Result 21593 states and 31122 transitions. [2021-11-03 04:13:14,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-03 04:13:14,709 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 04:13:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:14,743 INFO L225 Difference]: With dead ends: 21593 [2021-11-03 04:13:14,743 INFO L226 Difference]: Without dead ends: 21591 [2021-11-03 04:13:14,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=784, Invalid=2998, Unknown=0, NotChecked=0, Total=3782 [2021-11-03 04:13:14,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21591 states. [2021-11-03 04:13:17,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21591 to 18751. [2021-11-03 04:13:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18751 states, 18750 states have (on average 1.4456533333333332) internal successors, (27106), 18750 states have internal predecessors, (27106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:18,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18751 states to 18751 states and 27106 transitions. [2021-11-03 04:13:18,026 INFO L78 Accepts]: Start accepts. Automaton has 18751 states and 27106 transitions. Word has length 75 [2021-11-03 04:13:18,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:18,026 INFO L470 AbstractCegarLoop]: Abstraction has 18751 states and 27106 transitions. [2021-11-03 04:13:18,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 34 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:18,027 INFO L276 IsEmpty]: Start isEmpty. Operand 18751 states and 27106 transitions. [2021-11-03 04:13:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:13:18,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:18,028 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] [2021-11-03 04:13:18,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-03 04:13:18,028 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:18,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:18,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2129487143, now seen corresponding path program 1 times [2021-11-03 04:13:18,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:13:18,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646005157] [2021-11-03 04:13:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:18,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:13:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:20,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:13:20,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646005157] [2021-11-03 04:13:20,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646005157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:20,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:20,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-11-03 04:13:20,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692171124] [2021-11-03 04:13:20,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-03 04:13:20,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:13:20,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-03 04:13:20,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-11-03 04:13:20,350 INFO L87 Difference]: Start difference. First operand 18751 states and 27106 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:29,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:29,864 INFO L93 Difference]: Finished difference Result 26197 states and 37844 transitions. [2021-11-03 04:13:29,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-03 04:13:29,870 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 04:13:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:29,900 INFO L225 Difference]: With dead ends: 26197 [2021-11-03 04:13:29,901 INFO L226 Difference]: Without dead ends: 24467 [2021-11-03 04:13:29,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=578, Invalid=2502, Unknown=0, NotChecked=0, Total=3080 [2021-11-03 04:13:29,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24467 states. [2021-11-03 04:13:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24467 to 18741. [2021-11-03 04:13:33,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18741 states, 18740 states have (on average 1.4458911419423692) internal successors, (27096), 18740 states have internal predecessors, (27096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18741 states to 18741 states and 27096 transitions. [2021-11-03 04:13:33,113 INFO L78 Accepts]: Start accepts. Automaton has 18741 states and 27096 transitions. Word has length 75 [2021-11-03 04:13:33,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:33,113 INFO L470 AbstractCegarLoop]: Abstraction has 18741 states and 27096 transitions. [2021-11-03 04:13:33,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:33,113 INFO L276 IsEmpty]: Start isEmpty. Operand 18741 states and 27096 transitions. [2021-11-03 04:13:33,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:13:33,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:33,115 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] [2021-11-03 04:13:33,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-03 04:13:33,115 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:33,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:33,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1632603897, now seen corresponding path program 1 times [2021-11-03 04:13:33,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:13:33,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564350715] [2021-11-03 04:13:33,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:33,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:13:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:36,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:36,534 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:13:36,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564350715] [2021-11-03 04:13:36,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564350715] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:36,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:36,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-11-03 04:13:36,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922130510] [2021-11-03 04:13:36,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-03 04:13:36,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:13:36,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-03 04:13:36,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1021, Unknown=0, NotChecked=0, Total=1122 [2021-11-03 04:13:36,535 INFO L87 Difference]: Start difference. First operand 18741 states and 27096 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:49,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:13:49,186 INFO L93 Difference]: Finished difference Result 26860 states and 38750 transitions. [2021-11-03 04:13:49,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-03 04:13:49,187 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 04:13:49,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:13:49,221 INFO L225 Difference]: With dead ends: 26860 [2021-11-03 04:13:49,221 INFO L226 Difference]: Without dead ends: 26858 [2021-11-03 04:13:49,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=647, Invalid=2433, Unknown=0, NotChecked=0, Total=3080 [2021-11-03 04:13:49,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26858 states. [2021-11-03 04:13:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26858 to 18737. [2021-11-03 04:13:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18737 states, 18736 states have (on average 1.4459329632792486) internal successors, (27091), 18736 states have internal predecessors, (27091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:52,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18737 states to 18737 states and 27091 transitions. [2021-11-03 04:13:52,511 INFO L78 Accepts]: Start accepts. Automaton has 18737 states and 27091 transitions. Word has length 75 [2021-11-03 04:13:52,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:13:52,511 INFO L470 AbstractCegarLoop]: Abstraction has 18737 states and 27091 transitions. [2021-11-03 04:13:52,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:13:52,511 INFO L276 IsEmpty]: Start isEmpty. Operand 18737 states and 27091 transitions. [2021-11-03 04:13:52,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 04:13:52,512 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:13:52,513 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] [2021-11-03 04:13:52,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-03 04:13:52,513 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:13:52,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:13:52,513 INFO L85 PathProgramCache]: Analyzing trace with hash -37831449, now seen corresponding path program 1 times [2021-11-03 04:13:52,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:13:52,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152631863] [2021-11-03 04:13:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:13:52,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:13:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:13:55,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:13:55,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:13:55,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152631863] [2021-11-03 04:13:55,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152631863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:13:55,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:13:55,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-11-03 04:13:55,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145860427] [2021-11-03 04:13:55,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-03 04:13:55,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:13:55,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-03 04:13:55,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-11-03 04:13:55,918 INFO L87 Difference]: Start difference. First operand 18737 states and 27091 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:07,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:07,890 INFO L93 Difference]: Finished difference Result 23352 states and 33661 transitions. [2021-11-03 04:14:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-03 04:14:07,891 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 04:14:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:07,917 INFO L225 Difference]: With dead ends: 23352 [2021-11-03 04:14:07,917 INFO L226 Difference]: Without dead ends: 23350 [2021-11-03 04:14:07,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=637, Invalid=2669, Unknown=0, NotChecked=0, Total=3306 [2021-11-03 04:14:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23350 states. [2021-11-03 04:14:11,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23350 to 18731. [2021-11-03 04:14:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18731 states, 18730 states have (on average 1.4460224239188468) internal successors, (27084), 18730 states have internal predecessors, (27084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18731 states to 18731 states and 27084 transitions. [2021-11-03 04:14:11,385 INFO L78 Accepts]: Start accepts. Automaton has 18731 states and 27084 transitions. Word has length 75 [2021-11-03 04:14:11,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:11,385 INFO L470 AbstractCegarLoop]: Abstraction has 18731 states and 27084 transitions. [2021-11-03 04:14:11,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 18731 states and 27084 transitions. [2021-11-03 04:14:11,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 04:14:11,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:11,387 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] [2021-11-03 04:14:11,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-03 04:14:11,388 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:14:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:11,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1172083803, now seen corresponding path program 1 times [2021-11-03 04:14:11,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:14:11,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054541691] [2021-11-03 04:14:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:11,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:14:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:23,472 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:14:23,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054541691] [2021-11-03 04:14:23,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054541691] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:23,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:14:23,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-11-03 04:14:23,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117404011] [2021-11-03 04:14:23,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-03 04:14:23,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:14:23,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-03 04:14:23,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1671, Unknown=0, NotChecked=0, Total=1806 [2021-11-03 04:14:23,474 INFO L87 Difference]: Start difference. First operand 18731 states and 27084 transitions. Second operand has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:43,932 INFO L93 Difference]: Finished difference Result 21549 states and 31074 transitions. [2021-11-03 04:14:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-03 04:14:43,932 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-03 04:14:43,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:43,953 INFO L225 Difference]: With dead ends: 21549 [2021-11-03 04:14:43,953 INFO L226 Difference]: Without dead ends: 21547 [2021-11-03 04:14:43,956 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=1098, Invalid=4014, Unknown=0, NotChecked=0, Total=5112 [2021-11-03 04:14:43,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21547 states. [2021-11-03 04:14:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21547 to 18707. [2021-11-03 04:14:47,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18707 states, 18706 states have (on average 1.4464877579386293) internal successors, (27058), 18706 states have internal predecessors, (27058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:47,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18707 states to 18707 states and 27058 transitions. [2021-11-03 04:14:47,067 INFO L78 Accepts]: Start accepts. Automaton has 18707 states and 27058 transitions. Word has length 77 [2021-11-03 04:14:47,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:47,067 INFO L470 AbstractCegarLoop]: Abstraction has 18707 states and 27058 transitions. [2021-11-03 04:14:47,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7906976744186047) internal successors, (77), 42 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:47,067 INFO L276 IsEmpty]: Start isEmpty. Operand 18707 states and 27058 transitions. [2021-11-03 04:14:47,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-03 04:14:47,069 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:47,069 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:14:47,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-03 04:14:47,069 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:14:47,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:47,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1973873642, now seen corresponding path program 1 times [2021-11-03 04:14:47,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:14:47,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634309748] [2021-11-03 04:14:47,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:47,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:14:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:47,116 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:14:47,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634309748] [2021-11-03 04:14:47,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634309748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:47,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:14:47,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:14:47,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036143507] [2021-11-03 04:14:47,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:14:47,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:14:47,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:14:47,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:14:47,118 INFO L87 Difference]: Start difference. First operand 18707 states and 27058 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:50,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:50,933 INFO L93 Difference]: Finished difference Result 29361 states and 42777 transitions. [2021-11-03 04:14:50,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:14:50,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-03 04:14:50,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:50,959 INFO L225 Difference]: With dead ends: 29361 [2021-11-03 04:14:50,959 INFO L226 Difference]: Without dead ends: 22751 [2021-11-03 04:14:50,969 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 [2021-11-03 04:14:50,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22751 states. [2021-11-03 04:14:54,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22751 to 21717. [2021-11-03 04:14:54,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21717 states, 21716 states have (on average 1.4461226745256954) internal successors, (31404), 21716 states have internal predecessors, (31404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21717 states to 21717 states and 31404 transitions. [2021-11-03 04:14:54,705 INFO L78 Accepts]: Start accepts. Automaton has 21717 states and 31404 transitions. Word has length 80 [2021-11-03 04:14:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:14:54,706 INFO L470 AbstractCegarLoop]: Abstraction has 21717 states and 31404 transitions. [2021-11-03 04:14:54,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 21717 states and 31404 transitions. [2021-11-03 04:14:54,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-03 04:14:54,709 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:14:54,709 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:14:54,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-03 04:14:54,709 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:14:54,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:14:54,710 INFO L85 PathProgramCache]: Analyzing trace with hash -242197279, now seen corresponding path program 1 times [2021-11-03 04:14:54,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:14:54,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589761878] [2021-11-03 04:14:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:14:54,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:14:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:14:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:14:54,756 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:14:54,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589761878] [2021-11-03 04:14:54,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589761878] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:14:54,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:14:54,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:14:54,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486366409] [2021-11-03 04:14:54,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:14:54,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:14:54,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:14:54,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:14:54,758 INFO L87 Difference]: Start difference. First operand 21717 states and 31404 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:14:59,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:14:59,423 INFO L93 Difference]: Finished difference Result 36821 states and 53622 transitions. [2021-11-03 04:14:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:14:59,424 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-03 04:14:59,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:14:59,588 INFO L225 Difference]: With dead ends: 36821 [2021-11-03 04:14:59,588 INFO L226 Difference]: Without dead ends: 27283 [2021-11-03 04:14:59,596 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 [2021-11-03 04:14:59,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27283 states. [2021-11-03 04:15:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27283 to 25837. [2021-11-03 04:15:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25837 states, 25836 states have (on average 1.444960520204366) internal successors, (37332), 25836 states have internal predecessors, (37332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:04,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25837 states to 25837 states and 37332 transitions. [2021-11-03 04:15:04,130 INFO L78 Accepts]: Start accepts. Automaton has 25837 states and 37332 transitions. Word has length 83 [2021-11-03 04:15:04,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:04,131 INFO L470 AbstractCegarLoop]: Abstraction has 25837 states and 37332 transitions. [2021-11-03 04:15:04,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:04,131 INFO L276 IsEmpty]: Start isEmpty. Operand 25837 states and 37332 transitions. [2021-11-03 04:15:04,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-03 04:15:04,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:04,133 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:15:04,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-11-03 04:15:04,134 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:04,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:04,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1502616025, now seen corresponding path program 1 times [2021-11-03 04:15:04,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:15:04,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556184440] [2021-11-03 04:15:04,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:04,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:15:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:04,177 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:15:04,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556184440] [2021-11-03 04:15:04,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556184440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:04,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:15:04,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:15:04,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45517599] [2021-11-03 04:15:04,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:15:04,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:15:04,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:15:04,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:15:04,180 INFO L87 Difference]: Start difference. First operand 25837 states and 37332 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:09,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:09,820 INFO L93 Difference]: Finished difference Result 47333 states and 68808 transitions. [2021-11-03 04:15:09,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:15:09,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-03 04:15:09,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:09,868 INFO L225 Difference]: With dead ends: 47333 [2021-11-03 04:15:09,869 INFO L226 Difference]: Without dead ends: 33899 [2021-11-03 04:15:09,883 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 [2021-11-03 04:15:09,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33899 states. [2021-11-03 04:15:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33899 to 31809. [2021-11-03 04:15:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31809 states, 31808 states have (on average 1.4413355130784709) internal successors, (45846), 31808 states have internal predecessors, (45846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:15,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31809 states to 31809 states and 45846 transitions. [2021-11-03 04:15:15,499 INFO L78 Accepts]: Start accepts. Automaton has 31809 states and 45846 transitions. Word has length 86 [2021-11-03 04:15:15,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:15,499 INFO L470 AbstractCegarLoop]: Abstraction has 31809 states and 45846 transitions. [2021-11-03 04:15:15,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:15,499 INFO L276 IsEmpty]: Start isEmpty. Operand 31809 states and 45846 transitions. [2021-11-03 04:15:15,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-03 04:15:15,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:15,502 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:15:15,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-03 04:15:15,503 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:15,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:15,503 INFO L85 PathProgramCache]: Analyzing trace with hash 56633709, now seen corresponding path program 1 times [2021-11-03 04:15:15,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:15:15,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969714397] [2021-11-03 04:15:15,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:15,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:15:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:15,545 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:15:15,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969714397] [2021-11-03 04:15:15,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969714397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:15,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:15:15,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:15:15,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21492004] [2021-11-03 04:15:15,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:15:15,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:15:15,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:15:15,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:15:15,547 INFO L87 Difference]: Start difference. First operand 31809 states and 45846 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:24,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:24,380 INFO L93 Difference]: Finished difference Result 62991 states and 90551 transitions. [2021-11-03 04:15:24,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:15:24,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-11-03 04:15:24,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:24,446 INFO L225 Difference]: With dead ends: 62991 [2021-11-03 04:15:24,447 INFO L226 Difference]: Without dead ends: 47485 [2021-11-03 04:15:24,466 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 [2021-11-03 04:15:24,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47485 states. [2021-11-03 04:15:33,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47485 to 47483. [2021-11-03 04:15:33,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47483 states, 47482 states have (on average 1.430584221389158) internal successors, (67927), 47482 states have internal predecessors, (67927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47483 states to 47483 states and 67927 transitions. [2021-11-03 04:15:33,721 INFO L78 Accepts]: Start accepts. Automaton has 47483 states and 67927 transitions. Word has length 89 [2021-11-03 04:15:33,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:33,721 INFO L470 AbstractCegarLoop]: Abstraction has 47483 states and 67927 transitions. [2021-11-03 04:15:33,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:33,722 INFO L276 IsEmpty]: Start isEmpty. Operand 47483 states and 67927 transitions. [2021-11-03 04:15:33,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-03 04:15:33,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:33,725 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:15:33,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-11-03 04:15:33,725 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:33,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:33,729 INFO L85 PathProgramCache]: Analyzing trace with hash -626574003, now seen corresponding path program 1 times [2021-11-03 04:15:33,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:15:33,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106268009] [2021-11-03 04:15:33,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:33,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:15:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:33,771 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:15:33,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106268009] [2021-11-03 04:15:33,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106268009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:33,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:15:33,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:15:33,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962017940] [2021-11-03 04:15:33,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:15:33,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:15:33,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:15:33,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:15:33,774 INFO L87 Difference]: Start difference. First operand 47483 states and 67927 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:46,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:15:46,210 INFO L93 Difference]: Finished difference Result 92665 states and 133197 transitions. [2021-11-03 04:15:46,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:15:46,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-11-03 04:15:46,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:15:46,311 INFO L225 Difference]: With dead ends: 92665 [2021-11-03 04:15:46,311 INFO L226 Difference]: Without dead ends: 64379 [2021-11-03 04:15:46,332 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 [2021-11-03 04:15:46,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64379 states. [2021-11-03 04:15:57,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64379 to 60061. [2021-11-03 04:15:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60061 states, 60060 states have (on average 1.4238927738927738) internal successors, (85519), 60060 states have internal predecessors, (85519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:58,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60061 states to 60061 states and 85519 transitions. [2021-11-03 04:15:58,212 INFO L78 Accepts]: Start accepts. Automaton has 60061 states and 85519 transitions. Word has length 89 [2021-11-03 04:15:58,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:15:58,213 INFO L470 AbstractCegarLoop]: Abstraction has 60061 states and 85519 transitions. [2021-11-03 04:15:58,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:15:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 60061 states and 85519 transitions. [2021-11-03 04:15:58,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-03 04:15:58,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:15:58,218 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:15:58,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-11-03 04:15:58,218 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:15:58,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:15:58,218 INFO L85 PathProgramCache]: Analyzing trace with hash 153940077, now seen corresponding path program 1 times [2021-11-03 04:15:58,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:15:58,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881211182] [2021-11-03 04:15:58,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:15:58,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:15:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:15:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:15:58,272 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:15:58,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881211182] [2021-11-03 04:15:58,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881211182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:15:58,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:15:58,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:15:58,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29691655] [2021-11-03 04:15:58,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:15:58,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:15:58,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:15:58,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:15:58,274 INFO L87 Difference]: Start difference. First operand 60061 states and 85519 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)