./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad0420e-74b7-429f-bcbf-d7b556ade064/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad0420e-74b7-429f-bcbf-d7b556ade064/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad0420e-74b7-429f-bcbf-d7b556ade064/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad0420e-74b7-429f-bcbf-d7b556ade064/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad0420e-74b7-429f-bcbf-d7b556ade064/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad0420e-74b7-429f-bcbf-d7b556ade064/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0a42ac25ff9e63a0c1036bc9e6198406f6fa05f356e4b6e7ac8346847c92ee58 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:12:39,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:12:39,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:12:39,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:12:39,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:12:39,435 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:12:39,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:12:39,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:12:39,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:12:39,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:12:39,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:12:39,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:12:39,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:12:39,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:12:39,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:12:39,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:12:39,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:12:39,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:12:39,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:12:39,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:12:39,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:12:39,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:12:39,486 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:12:39,487 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:12:39,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:12:39,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:12:39,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:12:39,497 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:12:39,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:12:39,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:12:39,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:12:39,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:12:39,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:12:39,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:12:39,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:12:39,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:12:39,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:12:39,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:12:39,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:12:39,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:12:39,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:12:39,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad0420e-74b7-429f-bcbf-d7b556ade064/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:12:39,555 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:12:39,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:12:39,558 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:12:39,558 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:12:39,558 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:12:39,558 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:12:39,564 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:12:39,565 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:12:39,565 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:12:39,565 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:12:39,566 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:12:39,567 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:12:39,567 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:12:39,567 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:12:39,568 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:12:39,568 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:12:39,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:12:39,569 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:12:39,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:12:39,569 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:12:39,570 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:12:39,570 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:12:39,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:12:39,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:12:39,571 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:12:39,571 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:12:39,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:12:39,571 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:12:39,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:12:39,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:12:39,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:12:39,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:12:39,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:12:39,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:12:39,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:12:39,575 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:12:39,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:12:39,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:12:39,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:12:39,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:12:39,577 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_1ad0420e-74b7-429f-bcbf-d7b556ade064/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad0420e-74b7-429f-bcbf-d7b556ade064/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a42ac25ff9e63a0c1036bc9e6198406f6fa05f356e4b6e7ac8346847c92ee58 [2021-11-12 23:12:39,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:12:39,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:12:39,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:12:39,883 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:12:39,884 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:12:39,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad0420e-74b7-429f-bcbf-d7b556ade064/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 23:12:39,965 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad0420e-74b7-429f-bcbf-d7b556ade064/bin/utaipan-vmNK8stdcF/data/eacf32186/9c555c8448fa47969ae861608d241fab/FLAGca0e892f5 [2021-11-12 23:12:40,618 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:12:40,618 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad0420e-74b7-429f-bcbf-d7b556ade064/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 23:12:40,635 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad0420e-74b7-429f-bcbf-d7b556ade064/bin/utaipan-vmNK8stdcF/data/eacf32186/9c555c8448fa47969ae861608d241fab/FLAGca0e892f5 [2021-11-12 23:12:40,799 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad0420e-74b7-429f-bcbf-d7b556ade064/bin/utaipan-vmNK8stdcF/data/eacf32186/9c555c8448fa47969ae861608d241fab [2021-11-12 23:12:40,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:12:40,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:12:40,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:12:40,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:12:40,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:12:40,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:12:40" (1/1) ... [2021-11-12 23:12:40,810 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5796c368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:40, skipping insertion in model container [2021-11-12 23:12:40,810 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:12:40" (1/1) ... [2021-11-12 23:12:40,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:12:40,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:12:41,600 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_1ad0420e-74b7-429f-bcbf-d7b556ade064/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[31925,31938] [2021-11-12 23:12:41,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:12:41,879 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:12:42,164 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_1ad0420e-74b7-429f-bcbf-d7b556ade064/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[31925,31938] [2021-11-12 23:12:42,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:12:42,324 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:12:42,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:42 WrapperNode [2021-11-12 23:12:42,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:12:42,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:12:42,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:12:42,327 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:12:42,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:42" (1/1) ... [2021-11-12 23:12:42,368 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:42" (1/1) ... [2021-11-12 23:12:42,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:12:42,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:12:42,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:12:42,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:12:42,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:42" (1/1) ... [2021-11-12 23:12:42,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:42" (1/1) ... [2021-11-12 23:12:42,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:42" (1/1) ... [2021-11-12 23:12:42,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:42" (1/1) ... [2021-11-12 23:12:42,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:42" (1/1) ... [2021-11-12 23:12:42,624 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:42" (1/1) ... [2021-11-12 23:12:42,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:42" (1/1) ... [2021-11-12 23:12:42,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:12:42,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:12:42,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:12:42,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:12:42,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:42" (1/1) ... [2021-11-12 23:12:42,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:12:42,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad0420e-74b7-429f-bcbf-d7b556ade064/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:12:42,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad0420e-74b7-429f-bcbf-d7b556ade064/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:12:42,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad0420e-74b7-429f-bcbf-d7b556ade064/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:12:42,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-12 23:12:42,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:12:42,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:12:42,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:12:45,819 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:12:45,819 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:12:45,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:12:45 BoogieIcfgContainer [2021-11-12 23:12:45,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:12:45,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:12:45,826 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:12:45,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:12:45,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:12:40" (1/3) ... [2021-11-12 23:12:45,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a03e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:12:45, skipping insertion in model container [2021-11-12 23:12:45,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:12:42" (2/3) ... [2021-11-12 23:12:45,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12a03e1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:12:45, skipping insertion in model container [2021-11-12 23:12:45,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:12:45" (3/3) ... [2021-11-12 23:12:45,833 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-11-12 23:12:45,842 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:12:45,842 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:12:45,905 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:12:45,916 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-12 23:12:45,917 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:12:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 580 states, 578 states have (on average 1.7093425605536332) internal successors, (988), 579 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:46,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-12 23:12:46,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:46,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:12:46,011 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:12:46,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:46,017 INFO L85 PathProgramCache]: Analyzing trace with hash -827744152, now seen corresponding path program 1 times [2021-11-12 23:12:46,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:12:46,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128519312] [2021-11-12 23:12:46,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:46,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:12:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:12:47,413 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:12:47,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128519312] [2021-11-12 23:12:47,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128519312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:12:47,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:12:47,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:12:47,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648136256] [2021-11-12 23:12:47,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:47,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:12:47,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:12:47,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:12:47,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:12:47,464 INFO L87 Difference]: Start difference. First operand has 580 states, 578 states have (on average 1.7093425605536332) internal successors, (988), 579 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:48,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:48,040 INFO L93 Difference]: Finished difference Result 1708 states and 2913 transitions. [2021-11-12 23:12:48,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:12:48,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 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 265 [2021-11-12 23:12:48,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:48,074 INFO L225 Difference]: With dead ends: 1708 [2021-11-12 23:12:48,074 INFO L226 Difference]: Without dead ends: 1133 [2021-11-12 23:12:48,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:12:48,090 INFO L933 BasicCegarLoop]: 1566 mSDtfsCounter, 2127 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 270.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2127 SdHoareTripleChecker+Valid, 2455 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.01ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 340.20ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:48,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2127 Valid, 2455 Invalid, 173 Unknown, 0 Unchecked, 29.01ms Time], IncrementalHoareTripleChecker [19 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 340.20ms Time] [2021-11-12 23:12:48,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-11-12 23:12:48,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1131. [2021-11-12 23:12:48,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 1.404424778761062) internal successors, (1587), 1130 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:48,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1587 transitions. [2021-11-12 23:12:48,250 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1587 transitions. Word has length 265 [2021-11-12 23:12:48,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:12:48,252 INFO L470 AbstractCegarLoop]: Abstraction has 1131 states and 1587 transitions. [2021-11-12 23:12:48,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:48,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1587 transitions. [2021-11-12 23:12:48,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-12 23:12:48,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:48,261 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:12:48,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-12 23:12:48,262 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:12:48,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:48,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1352410036, now seen corresponding path program 1 times [2021-11-12 23:12:48,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:12:48,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718517465] [2021-11-12 23:12:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:48,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:12:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:12:48,477 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:12:48,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718517465] [2021-11-12 23:12:48,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718517465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:12:48,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:12:48,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:12:48,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176964853] [2021-11-12 23:12:48,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:48,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:12:48,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:12:48,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:12:48,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:12:48,483 INFO L87 Difference]: Start difference. First operand 1131 states and 1587 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:48,832 INFO L93 Difference]: Finished difference Result 3232 states and 4511 transitions. [2021-11-12 23:12:48,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:12:48,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 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 267 [2021-11-12 23:12:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:48,847 INFO L225 Difference]: With dead ends: 3232 [2021-11-12 23:12:48,847 INFO L226 Difference]: Without dead ends: 2222 [2021-11-12 23:12:48,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:12:48,856 INFO L933 BasicCegarLoop]: 1438 mSDtfsCounter, 695 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 186.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 2172 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.97ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 229.16ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:48,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 2172 Invalid, 159 Unknown, 0 Unchecked, 7.97ms Time], IncrementalHoareTripleChecker [9 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 229.16ms Time] [2021-11-12 23:12:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-11-12 23:12:49,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 2220. [2021-11-12 23:12:49,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2220 states, 2219 states have (on average 1.398377647589004) internal successors, (3103), 2219 states have internal predecessors, (3103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2220 states to 2220 states and 3103 transitions. [2021-11-12 23:12:49,043 INFO L78 Accepts]: Start accepts. Automaton has 2220 states and 3103 transitions. Word has length 267 [2021-11-12 23:12:49,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:12:49,044 INFO L470 AbstractCegarLoop]: Abstraction has 2220 states and 3103 transitions. [2021-11-12 23:12:49,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2220 states and 3103 transitions. [2021-11-12 23:12:49,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-11-12 23:12:49,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:49,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:12:49,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-12 23:12:49,054 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:12:49,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:49,054 INFO L85 PathProgramCache]: Analyzing trace with hash -726215213, now seen corresponding path program 1 times [2021-11-12 23:12:49,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:12:49,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026013645] [2021-11-12 23:12:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:49,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:12:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:12:49,146 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:12:49,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026013645] [2021-11-12 23:12:49,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026013645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:12:49,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:12:49,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:12:49,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260093226] [2021-11-12 23:12:49,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:49,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:12:49,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:12:49,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:12:49,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:12:49,149 INFO L87 Difference]: Start difference. First operand 2220 states and 3103 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:49,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:49,607 INFO L93 Difference]: Finished difference Result 6508 states and 9076 transitions. [2021-11-12 23:12:49,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:12:49,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 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 267 [2021-11-12 23:12:49,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:49,633 INFO L225 Difference]: With dead ends: 6508 [2021-11-12 23:12:49,633 INFO L226 Difference]: Without dead ends: 4420 [2021-11-12 23:12:49,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:12:49,645 INFO L933 BasicCegarLoop]: 1528 mSDtfsCounter, 806 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 173.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 2290 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.88ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 214.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:49,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 2290 Invalid, 141 Unknown, 0 Unchecked, 8.88ms Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 214.98ms Time] [2021-11-12 23:12:49,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4420 states. [2021-11-12 23:12:49,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4420 to 2223. [2021-11-12 23:12:49,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 1.3978397839783978) internal successors, (3106), 2222 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3106 transitions. [2021-11-12 23:12:49,863 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3106 transitions. Word has length 267 [2021-11-12 23:12:49,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:12:49,863 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 3106 transitions. [2021-11-12 23:12:49,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:49,864 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3106 transitions. [2021-11-12 23:12:49,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-11-12 23:12:49,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:49,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:12:49,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-12 23:12:49,872 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:12:49,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:49,873 INFO L85 PathProgramCache]: Analyzing trace with hash 611118522, now seen corresponding path program 1 times [2021-11-12 23:12:49,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:12:49,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670399316] [2021-11-12 23:12:49,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:49,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:12:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:12:50,450 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:12:50,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670399316] [2021-11-12 23:12:50,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670399316] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:12:50,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:12:50,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:12:50,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356024209] [2021-11-12 23:12:50,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:50,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:12:50,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:12:50,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:12:50,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:12:50,454 INFO L87 Difference]: Start difference. First operand 2223 states and 3106 transitions. Second operand has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:51,078 INFO L93 Difference]: Finished difference Result 6451 states and 8989 transitions. [2021-11-12 23:12:51,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:12:51,079 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 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 268 [2021-11-12 23:12:51,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:51,105 INFO L225 Difference]: With dead ends: 6451 [2021-11-12 23:12:51,105 INFO L226 Difference]: Without dead ends: 4243 [2021-11-12 23:12:51,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:12:51,117 INFO L933 BasicCegarLoop]: 1268 mSDtfsCounter, 1575 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 222.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1575 SdHoareTripleChecker+Valid, 2716 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.48ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 266.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:51,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1575 Valid, 2716 Invalid, 226 Unknown, 0 Unchecked, 11.48ms Time], IncrementalHoareTripleChecker [18 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 266.24ms Time] [2021-11-12 23:12:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2021-11-12 23:12:51,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 4241. [2021-11-12 23:12:51,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4241 states, 4240 states have (on average 1.3841981132075472) internal successors, (5869), 4240 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:51,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4241 states to 4241 states and 5869 transitions. [2021-11-12 23:12:51,419 INFO L78 Accepts]: Start accepts. Automaton has 4241 states and 5869 transitions. Word has length 268 [2021-11-12 23:12:51,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:12:51,421 INFO L470 AbstractCegarLoop]: Abstraction has 4241 states and 5869 transitions. [2021-11-12 23:12:51,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 53.6) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:51,422 INFO L276 IsEmpty]: Start isEmpty. Operand 4241 states and 5869 transitions. [2021-11-12 23:12:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-12 23:12:51,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:51,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:12:51,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-12 23:12:51,434 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:12:51,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:51,434 INFO L85 PathProgramCache]: Analyzing trace with hash -784131189, now seen corresponding path program 1 times [2021-11-12 23:12:51,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:12:51,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007634237] [2021-11-12 23:12:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:51,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:12:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:12:51,940 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:12:51,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007634237] [2021-11-12 23:12:51,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007634237] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:12:51,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:12:51,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:12:51,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304412969] [2021-11-12 23:12:51,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:51,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:12:51,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:12:51,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:12:51,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:12:51,944 INFO L87 Difference]: Start difference. First operand 4241 states and 5869 transitions. Second operand has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:52,800 INFO L93 Difference]: Finished difference Result 12399 states and 17122 transitions. [2021-11-12 23:12:52,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:12:52,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 269 [2021-11-12 23:12:52,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:52,844 INFO L225 Difference]: With dead ends: 12399 [2021-11-12 23:12:52,844 INFO L226 Difference]: Without dead ends: 8296 [2021-11-12 23:12:52,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:12:52,854 INFO L933 BasicCegarLoop]: 1261 mSDtfsCounter, 1727 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1727 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.64ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 223.22ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:52,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1727 Valid, 1989 Invalid, 161 Unknown, 0 Unchecked, 10.64ms Time], IncrementalHoareTripleChecker [15 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 223.22ms Time] [2021-11-12 23:12:52,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8296 states. [2021-11-12 23:12:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8296 to 8294. [2021-11-12 23:12:53,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8294 states, 8293 states have (on average 1.375015072953093) internal successors, (11403), 8293 states have internal predecessors, (11403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8294 states to 8294 states and 11403 transitions. [2021-11-12 23:12:53,470 INFO L78 Accepts]: Start accepts. Automaton has 8294 states and 11403 transitions. Word has length 269 [2021-11-12 23:12:53,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:12:53,473 INFO L470 AbstractCegarLoop]: Abstraction has 8294 states and 11403 transitions. [2021-11-12 23:12:53,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.25) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:53,476 INFO L276 IsEmpty]: Start isEmpty. Operand 8294 states and 11403 transitions. [2021-11-12 23:12:53,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-11-12 23:12:53,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:53,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:12:53,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-12 23:12:53,499 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:12:53,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:53,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2436315, now seen corresponding path program 1 times [2021-11-12 23:12:53,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:12:53,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225363712] [2021-11-12 23:12:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:53,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:12:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:12:53,888 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:12:53,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225363712] [2021-11-12 23:12:53,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225363712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:12:53,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:12:53,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:12:53,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625222424] [2021-11-12 23:12:53,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:53,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:12:53,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:12:53,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:12:53,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:12:53,891 INFO L87 Difference]: Start difference. First operand 8294 states and 11403 transitions. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:55,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:55,188 INFO L93 Difference]: Finished difference Result 24342 states and 33400 transitions. [2021-11-12 23:12:55,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:12:55,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 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 271 [2021-11-12 23:12:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:55,250 INFO L225 Difference]: With dead ends: 24342 [2021-11-12 23:12:55,250 INFO L226 Difference]: Without dead ends: 16190 [2021-11-12 23:12:55,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:12:55,266 INFO L933 BasicCegarLoop]: 1246 mSDtfsCounter, 1706 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 189.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1706 SdHoareTripleChecker+Valid, 1966 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.10ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 296.24ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:55,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1706 Valid, 1966 Invalid, 173 Unknown, 0 Unchecked, 9.10ms Time], IncrementalHoareTripleChecker [19 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 296.24ms Time] [2021-11-12 23:12:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16190 states. [2021-11-12 23:12:56,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16190 to 16188. [2021-11-12 23:12:56,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16188 states, 16187 states have (on average 1.3635633533082103) internal successors, (22072), 16187 states have internal predecessors, (22072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:56,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16188 states to 16188 states and 22072 transitions. [2021-11-12 23:12:56,546 INFO L78 Accepts]: Start accepts. Automaton has 16188 states and 22072 transitions. Word has length 271 [2021-11-12 23:12:56,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:12:56,547 INFO L470 AbstractCegarLoop]: Abstraction has 16188 states and 22072 transitions. [2021-11-12 23:12:56,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:12:56,548 INFO L276 IsEmpty]: Start isEmpty. Operand 16188 states and 22072 transitions. [2021-11-12 23:12:56,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-12 23:12:56,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:12:56,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:12:56,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-12 23:12:56,583 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:12:56,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:12:56,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1086665890, now seen corresponding path program 1 times [2021-11-12 23:12:56,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:12:56,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430411671] [2021-11-12 23:12:56,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:12:56,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:12:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:12:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:12:56,695 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:12:56,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430411671] [2021-11-12 23:12:56,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430411671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:12:56,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:12:56,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:12:56,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920029553] [2021-11-12 23:12:56,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:12:56,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:12:56,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:12:56,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:12:56,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:12:56,698 INFO L87 Difference]: Start difference. First operand 16188 states and 22072 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 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) [2021-11-12 23:12:58,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:12:58,843 INFO L93 Difference]: Finished difference Result 46359 states and 62865 transitions. [2021-11-12 23:12:58,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:12:58,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 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) Word has length 273 [2021-11-12 23:12:58,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:12:58,917 INFO L225 Difference]: With dead ends: 46359 [2021-11-12 23:12:58,917 INFO L226 Difference]: Without dead ends: 31733 [2021-11-12 23:12:58,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:12:58,943 INFO L933 BasicCegarLoop]: 1452 mSDtfsCounter, 678 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 311.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 2186 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.44ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 349.26ms IncrementalHoareTripleChecker+Time [2021-11-12 23:12:58,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 2186 Invalid, 154 Unknown, 0 Unchecked, 7.44ms Time], IncrementalHoareTripleChecker [9 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 349.26ms Time] [2021-11-12 23:12:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31733 states. [2021-11-12 23:13:01,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31733 to 31731. [2021-11-12 23:13:01,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31731 states, 31730 states have (on average 1.3559092341632524) internal successors, (43023), 31730 states have internal predecessors, (43023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:01,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31731 states to 31731 states and 43023 transitions. [2021-11-12 23:13:01,375 INFO L78 Accepts]: Start accepts. Automaton has 31731 states and 43023 transitions. Word has length 273 [2021-11-12 23:13:01,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:01,375 INFO L470 AbstractCegarLoop]: Abstraction has 31731 states and 43023 transitions. [2021-11-12 23:13:01,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 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) [2021-11-12 23:13:01,376 INFO L276 IsEmpty]: Start isEmpty. Operand 31731 states and 43023 transitions. [2021-11-12 23:13:01,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-12 23:13:01,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:01,445 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:13:01,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-12 23:13:01,446 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:01,447 INFO L85 PathProgramCache]: Analyzing trace with hash 7289790, now seen corresponding path program 1 times [2021-11-12 23:13:01,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:13:01,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460583472] [2021-11-12 23:13:01,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:01,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:13:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:13:01,644 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:13:01,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460583472] [2021-11-12 23:13:01,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460583472] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:01,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:01,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:13:01,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347013580] [2021-11-12 23:13:01,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:01,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:13:01,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:13:01,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:13:01,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:13:01,647 INFO L87 Difference]: Start difference. First operand 31731 states and 43023 transitions. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 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) [2021-11-12 23:13:04,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:04,565 INFO L93 Difference]: Finished difference Result 93258 states and 126187 transitions. [2021-11-12 23:13:04,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:13:04,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 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) Word has length 273 [2021-11-12 23:13:04,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:04,740 INFO L225 Difference]: With dead ends: 93258 [2021-11-12 23:13:04,740 INFO L226 Difference]: Without dead ends: 63213 [2021-11-12 23:13:04,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 23:13:04,800 INFO L933 BasicCegarLoop]: 1507 mSDtfsCounter, 782 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 189.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 2269 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.03ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 224.29ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:04,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 2269 Invalid, 138 Unknown, 0 Unchecked, 7.03ms Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 224.29ms Time] [2021-11-12 23:13:04,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63213 states. [2021-11-12 23:13:07,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63213 to 31764. [2021-11-12 23:13:07,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31764 states, 31763 states have (on average 1.3555394641564085) internal successors, (43056), 31763 states have internal predecessors, (43056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31764 states to 31764 states and 43056 transitions. [2021-11-12 23:13:07,678 INFO L78 Accepts]: Start accepts. Automaton has 31764 states and 43056 transitions. Word has length 273 [2021-11-12 23:13:07,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:07,679 INFO L470 AbstractCegarLoop]: Abstraction has 31764 states and 43056 transitions. [2021-11-12 23:13:07,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 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) [2021-11-12 23:13:07,679 INFO L276 IsEmpty]: Start isEmpty. Operand 31764 states and 43056 transitions. [2021-11-12 23:13:07,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-11-12 23:13:07,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:07,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:13:07,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-12 23:13:07,738 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:07,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:07,738 INFO L85 PathProgramCache]: Analyzing trace with hash -707710901, now seen corresponding path program 1 times [2021-11-12 23:13:07,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:13:07,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610994263] [2021-11-12 23:13:07,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:07,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:13:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:13:08,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:13:08,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610994263] [2021-11-12 23:13:08,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610994263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:08,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:08,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-12 23:13:08,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575869309] [2021-11-12 23:13:08,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:08,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:13:08,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:13:08,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:13:08,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:13:08,133 INFO L87 Difference]: Start difference. First operand 31764 states and 43056 transitions. Second operand has 5 states, 5 states have (on average 54.8) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:11,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:11,401 INFO L93 Difference]: Finished difference Result 92327 states and 124767 transitions. [2021-11-12 23:13:11,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:13:11,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 54.8) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 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 274 [2021-11-12 23:13:11,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:11,537 INFO L225 Difference]: With dead ends: 92327 [2021-11-12 23:13:11,537 INFO L226 Difference]: Without dead ends: 60763 [2021-11-12 23:13:11,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:13:11,583 INFO L933 BasicCegarLoop]: 1254 mSDtfsCounter, 1554 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1554 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.14ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 266.47ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:11,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1554 Valid, 2710 Invalid, 216 Unknown, 0 Unchecked, 15.14ms Time], IncrementalHoareTripleChecker [14 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 266.47ms Time] [2021-11-12 23:13:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60763 states. [2021-11-12 23:13:15,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60763 to 60761. [2021-11-12 23:13:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60761 states, 60760 states have (on average 1.3437623436471362) internal successors, (81647), 60760 states have internal predecessors, (81647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60761 states to 60761 states and 81647 transitions. [2021-11-12 23:13:15,269 INFO L78 Accepts]: Start accepts. Automaton has 60761 states and 81647 transitions. Word has length 274 [2021-11-12 23:13:15,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:15,270 INFO L470 AbstractCegarLoop]: Abstraction has 60761 states and 81647 transitions. [2021-11-12 23:13:15,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.8) internal successors, (274), 4 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:15,270 INFO L276 IsEmpty]: Start isEmpty. Operand 60761 states and 81647 transitions. [2021-11-12 23:13:15,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-12 23:13:15,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:15,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:13:15,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-12 23:13:15,347 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:15,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:15,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1413033287, now seen corresponding path program 1 times [2021-11-12 23:13:15,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:13:15,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565295302] [2021-11-12 23:13:15,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:15,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:13:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:15,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:13:15,889 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:13:15,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565295302] [2021-11-12 23:13:15,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565295302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:15,890 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:15,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:13:15,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459672686] [2021-11-12 23:13:15,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:15,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:13:15,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:13:15,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:13:15,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:13:15,892 INFO L87 Difference]: Start difference. First operand 60761 states and 81647 transitions. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:22,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:13:22,104 INFO L93 Difference]: Finished difference Result 177467 states and 237775 transitions. [2021-11-12 23:13:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:13:22,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 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 275 [2021-11-12 23:13:22,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:13:22,314 INFO L225 Difference]: With dead ends: 177467 [2021-11-12 23:13:22,314 INFO L226 Difference]: Without dead ends: 118970 [2021-11-12 23:13:22,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 23:13:22,379 INFO L933 BasicCegarLoop]: 1253 mSDtfsCounter, 1717 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 176.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 1985 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.91ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 225.54ms IncrementalHoareTripleChecker+Time [2021-11-12 23:13:22,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1717 Valid, 1985 Invalid, 154 Unknown, 0 Unchecked, 8.91ms Time], IncrementalHoareTripleChecker [11 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 225.54ms Time] [2021-11-12 23:13:22,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118970 states. [2021-11-12 23:13:29,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118970 to 118968. [2021-11-12 23:13:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118968 states, 118967 states have (on average 1.3357149461615405) internal successors, (158906), 118967 states have internal predecessors, (158906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:29,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118968 states to 118968 states and 158906 transitions. [2021-11-12 23:13:29,962 INFO L78 Accepts]: Start accepts. Automaton has 118968 states and 158906 transitions. Word has length 275 [2021-11-12 23:13:29,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:13:29,962 INFO L470 AbstractCegarLoop]: Abstraction has 118968 states and 158906 transitions. [2021-11-12 23:13:29,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:13:29,962 INFO L276 IsEmpty]: Start isEmpty. Operand 118968 states and 158906 transitions. [2021-11-12 23:13:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-12 23:13:30,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:13:30,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:13:30,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-12 23:13:30,142 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:13:30,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:13:30,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1413975928, now seen corresponding path program 1 times [2021-11-12 23:13:30,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-12 23:13:30,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618958049] [2021-11-12 23:13:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:13:30,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-12 23:13:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:13:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:13:30,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-12 23:13:30,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618958049] [2021-11-12 23:13:30,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618958049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-12 23:13:30,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:13:30,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-12 23:13:30,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734097568] [2021-11-12 23:13:30,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:13:30,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:13:30,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-12 23:13:30,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:13:30,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:13:30,489 INFO L87 Difference]: Start difference. First operand 118968 states and 158906 transitions. Second operand has 4 states, 4 states have (on average 69.25) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)