./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1fd92a9fd772101c63f3ecfbb0edb55e50fbfbad037a68e9b6ad137393c8d528 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:42:57,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:42:57,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:42:57,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:42:57,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:42:57,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:42:57,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:42:57,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:42:57,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:42:57,311 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:42:57,312 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:42:57,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:42:57,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:42:57,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:42:57,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:42:57,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:42:57,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:42:57,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:42:57,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:42:57,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:42:57,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:42:57,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:42:57,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:42:57,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:42:57,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:42:57,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:42:57,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:42:57,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:42:57,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:42:57,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:42:57,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:42:57,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:42:57,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:42:57,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:42:57,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:42:57,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:42:57,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:42:57,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:42:57,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:42:57,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:42:57,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:42:57,351 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:42:57,382 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:42:57,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:42:57,383 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:42:57,383 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:42:57,384 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:42:57,384 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:42:57,384 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:42:57,384 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:42:57,384 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:42:57,385 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:42:57,385 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:42:57,385 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:42:57,385 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:42:57,385 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:42:57,386 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:42:57,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:42:57,387 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:42:57,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:42:57,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:42:57,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:42:57,387 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:42:57,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:42:57,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:42:57,394 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:42:57,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:42:57,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:42:57,395 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:42:57,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:42:57,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:42:57,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:42:57,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:42:57,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:42:57,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:42:57,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:42:57,398 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:42:57,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:42:57,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:42:57,400 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:42:57,400 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:42:57,400 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_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fd92a9fd772101c63f3ecfbb0edb55e50fbfbad037a68e9b6ad137393c8d528 [2021-11-07 01:42:57,697 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:42:57,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:42:57,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:42:57,742 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:42:57,743 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:42:57,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c [2021-11-07 01:42:57,832 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/data/735b91c73/3a71014256d14f5d90e1a18e99ab7f82/FLAG50b94e587 [2021-11-07 01:42:58,605 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:42:58,612 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c [2021-11-07 01:42:58,649 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/data/735b91c73/3a71014256d14f5d90e1a18e99ab7f82/FLAG50b94e587 [2021-11-07 01:42:58,810 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/data/735b91c73/3a71014256d14f5d90e1a18e99ab7f82 [2021-11-07 01:42:58,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:42:58,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:42:58,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:58,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:42:58,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:42:58,831 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:58" (1/1) ... [2021-11-07 01:42:58,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a49dd9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:58, skipping insertion in model container [2021-11-07 01:42:58,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:58" (1/1) ... [2021-11-07 01:42:58,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:42:58,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:42:59,532 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_61a157f1-ec67-4703-8f61-ea98a95f8a0f/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c[55771,55784] [2021-11-07 01:42:59,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:59,546 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:42:59,664 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_61a157f1-ec67-4703-8f61-ea98a95f8a0f/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c[55771,55784] [2021-11-07 01:42:59,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:42:59,687 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:42:59,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59 WrapperNode [2021-11-07 01:42:59,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:42:59,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:42:59,689 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:42:59,689 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:42:59,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2021-11-07 01:42:59,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2021-11-07 01:42:59,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:42:59,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:42:59,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:42:59,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:42:59,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2021-11-07 01:42:59,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2021-11-07 01:42:59,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2021-11-07 01:42:59,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2021-11-07 01:42:59,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2021-11-07 01:42:59,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2021-11-07 01:42:59,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2021-11-07 01:42:59,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:42:59,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:42:59,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:42:59,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:42:59,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (1/1) ... [2021-11-07 01:43:00,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:43:00,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:43:00,030 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:43:00,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:43:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:43:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:43:00,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:43:00,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:43:07,537 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:43:07,538 INFO L299 CfgBuilder]: Removed 23 assume(true) statements. [2021-11-07 01:43:07,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:43:07 BoogieIcfgContainer [2021-11-07 01:43:07,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:43:07,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:43:07,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:43:07,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:43:07,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:42:58" (1/3) ... [2021-11-07 01:43:07,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a358a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:43:07, skipping insertion in model container [2021-11-07 01:43:07,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:59" (2/3) ... [2021-11-07 01:43:07,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a358a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:43:07, skipping insertion in model container [2021-11-07 01:43:07,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:43:07" (3/3) ... [2021-11-07 01:43:07,558 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c [2021-11-07 01:43:07,565 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:43:07,565 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:43:07,650 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:43:07,658 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:43:07,658 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:43:07,690 INFO L276 IsEmpty]: Start isEmpty. Operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:07,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 01:43:07,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:07,716 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:07,717 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:07,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:07,724 INFO L85 PathProgramCache]: Analyzing trace with hash -944750787, now seen corresponding path program 1 times [2021-11-07 01:43:07,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:07,735 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555381703] [2021-11-07 01:43:07,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:07,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:10,750 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:10,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555381703] [2021-11-07 01:43:10,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555381703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:10,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:10,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:43:10,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545719318] [2021-11-07 01:43:10,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:10,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:10,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:10,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:10,782 INFO L87 Difference]: Start difference. First operand has 441 states, 439 states have (on average 1.7175398633257404) internal successors, (754), 440 states have internal predecessors, (754), 0 states have call successors, (0), 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 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:11,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:11,013 INFO L93 Difference]: Finished difference Result 483 states and 822 transitions. [2021-11-07 01:43:11,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:11,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2021-11-07 01:43:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:11,039 INFO L225 Difference]: With dead ends: 483 [2021-11-07 01:43:11,039 INFO L226 Difference]: Without dead ends: 460 [2021-11-07 01:43:11,043 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-07 01:43:11,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 450. [2021-11-07 01:43:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.712694877505568) internal successors, (769), 449 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 769 transitions. [2021-11-07 01:43:11,146 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 769 transitions. Word has length 126 [2021-11-07 01:43:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:11,154 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 769 transitions. [2021-11-07 01:43:11,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:11,155 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 769 transitions. [2021-11-07 01:43:11,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 01:43:11,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:11,168 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:11,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:43:11,168 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:11,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:11,169 INFO L85 PathProgramCache]: Analyzing trace with hash 703754101, now seen corresponding path program 1 times [2021-11-07 01:43:11,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:11,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614133705] [2021-11-07 01:43:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:11,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:12,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:12,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614133705] [2021-11-07 01:43:12,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614133705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:12,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:12,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:43:12,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284307409] [2021-11-07 01:43:12,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:12,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:12,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:12,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:12,913 INFO L87 Difference]: Start difference. First operand 450 states and 769 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:13,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:13,106 INFO L93 Difference]: Finished difference Result 483 states and 819 transitions. [2021-11-07 01:43:13,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:13,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-11-07 01:43:13,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:13,112 INFO L225 Difference]: With dead ends: 483 [2021-11-07 01:43:13,112 INFO L226 Difference]: Without dead ends: 462 [2021-11-07 01:43:13,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:13,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-07 01:43:13,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-07 01:43:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.710467706013363) internal successors, (768), 449 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 768 transitions. [2021-11-07 01:43:13,187 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 768 transitions. Word has length 127 [2021-11-07 01:43:13,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:13,190 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 768 transitions. [2021-11-07 01:43:13,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:13,192 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 768 transitions. [2021-11-07 01:43:13,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-07 01:43:13,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:13,200 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:13,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:43:13,201 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:13,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:13,203 INFO L85 PathProgramCache]: Analyzing trace with hash 273249830, now seen corresponding path program 1 times [2021-11-07 01:43:13,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:13,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338137989] [2021-11-07 01:43:13,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:13,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:14,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:14,867 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:14,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338137989] [2021-11-07 01:43:14,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338137989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:14,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:14,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:43:14,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014361462] [2021-11-07 01:43:14,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:14,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:14,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:14,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:14,871 INFO L87 Difference]: Start difference. First operand 450 states and 768 transitions. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:14,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:14,987 INFO L93 Difference]: Finished difference Result 483 states and 818 transitions. [2021-11-07 01:43:14,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:14,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2021-11-07 01:43:14,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:14,991 INFO L225 Difference]: With dead ends: 483 [2021-11-07 01:43:14,991 INFO L226 Difference]: Without dead ends: 462 [2021-11-07 01:43:14,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:14,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-07 01:43:15,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-07 01:43:15,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7082405345211582) internal successors, (767), 449 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:15,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 767 transitions. [2021-11-07 01:43:15,008 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 767 transitions. Word has length 128 [2021-11-07 01:43:15,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:15,008 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 767 transitions. [2021-11-07 01:43:15,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:15,009 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 767 transitions. [2021-11-07 01:43:15,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-07 01:43:15,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:15,011 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:15,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:43:15,012 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:15,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:15,013 INFO L85 PathProgramCache]: Analyzing trace with hash -182028930, now seen corresponding path program 1 times [2021-11-07 01:43:15,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:15,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25065965] [2021-11-07 01:43:15,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:15,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:15,918 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:15,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25065965] [2021-11-07 01:43:15,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25065965] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:15,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:15,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:43:15,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893641017] [2021-11-07 01:43:15,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:15,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:15,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:15,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:15,927 INFO L87 Difference]: Start difference. First operand 450 states and 767 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:16,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:16,068 INFO L93 Difference]: Finished difference Result 483 states and 817 transitions. [2021-11-07 01:43:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:16,069 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2021-11-07 01:43:16,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:16,073 INFO L225 Difference]: With dead ends: 483 [2021-11-07 01:43:16,073 INFO L226 Difference]: Without dead ends: 462 [2021-11-07 01:43:16,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:16,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-07 01:43:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-07 01:43:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7060133630289531) internal successors, (766), 449 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 766 transitions. [2021-11-07 01:43:16,092 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 766 transitions. Word has length 129 [2021-11-07 01:43:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:16,093 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 766 transitions. [2021-11-07 01:43:16,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:16,094 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 766 transitions. [2021-11-07 01:43:16,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 01:43:16,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:16,098 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:16,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:43:16,098 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:16,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:16,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1405316849, now seen corresponding path program 1 times [2021-11-07 01:43:16,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:16,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152754235] [2021-11-07 01:43:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:16,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:17,184 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:17,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152754235] [2021-11-07 01:43:17,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152754235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:17,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:17,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:43:17,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110660819] [2021-11-07 01:43:17,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:17,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:17,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:17,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:17,188 INFO L87 Difference]: Start difference. First operand 450 states and 766 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:17,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:17,359 INFO L93 Difference]: Finished difference Result 483 states and 816 transitions. [2021-11-07 01:43:17,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:17,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-11-07 01:43:17,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:17,363 INFO L225 Difference]: With dead ends: 483 [2021-11-07 01:43:17,363 INFO L226 Difference]: Without dead ends: 462 [2021-11-07 01:43:17,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:17,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-07 01:43:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-07 01:43:17,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7037861915367483) internal successors, (765), 449 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 765 transitions. [2021-11-07 01:43:17,381 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 765 transitions. Word has length 130 [2021-11-07 01:43:17,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:17,382 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 765 transitions. [2021-11-07 01:43:17,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:17,382 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 765 transitions. [2021-11-07 01:43:17,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 01:43:17,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:17,385 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:17,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:43:17,385 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:17,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:17,386 INFO L85 PathProgramCache]: Analyzing trace with hash -667084921, now seen corresponding path program 1 times [2021-11-07 01:43:17,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:17,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860855] [2021-11-07 01:43:17,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:17,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:18,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:18,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860855] [2021-11-07 01:43:18,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860855] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:18,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:18,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:43:18,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238137929] [2021-11-07 01:43:18,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:18,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:18,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:18,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:18,193 INFO L87 Difference]: Start difference. First operand 450 states and 765 transitions. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:18,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:18,334 INFO L93 Difference]: Finished difference Result 483 states and 815 transitions. [2021-11-07 01:43:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:18,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2021-11-07 01:43:18,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:18,338 INFO L225 Difference]: With dead ends: 483 [2021-11-07 01:43:18,338 INFO L226 Difference]: Without dead ends: 462 [2021-11-07 01:43:18,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-07 01:43:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 450. [2021-11-07 01:43:18,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.7015590200445434) internal successors, (764), 449 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:18,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 764 transitions. [2021-11-07 01:43:18,357 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 764 transitions. Word has length 131 [2021-11-07 01:43:18,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:18,358 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 764 transitions. [2021-11-07 01:43:18,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:18,359 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 764 transitions. [2021-11-07 01:43:18,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-07 01:43:18,361 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:18,361 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:18,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:43:18,362 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:18,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:18,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1696391599, now seen corresponding path program 1 times [2021-11-07 01:43:18,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:18,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566364671] [2021-11-07 01:43:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:18,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:19,303 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:19,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566364671] [2021-11-07 01:43:19,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566364671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:19,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:19,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:43:19,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023428194] [2021-11-07 01:43:19,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:19,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:19,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:19,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:19,307 INFO L87 Difference]: Start difference. First operand 450 states and 764 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:19,442 INFO L93 Difference]: Finished difference Result 481 states and 811 transitions. [2021-11-07 01:43:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:19,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 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 133 [2021-11-07 01:43:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:19,446 INFO L225 Difference]: With dead ends: 481 [2021-11-07 01:43:19,446 INFO L226 Difference]: Without dead ends: 460 [2021-11-07 01:43:19,447 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:19,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-11-07 01:43:19,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 451. [2021-11-07 01:43:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.7) internal successors, (765), 450 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 765 transitions. [2021-11-07 01:43:19,462 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 765 transitions. Word has length 133 [2021-11-07 01:43:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:19,463 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 765 transitions. [2021-11-07 01:43:19,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 765 transitions. [2021-11-07 01:43:19,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 01:43:19,465 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:19,466 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:19,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:43:19,466 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:19,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:19,467 INFO L85 PathProgramCache]: Analyzing trace with hash 960400390, now seen corresponding path program 1 times [2021-11-07 01:43:19,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:19,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014199800] [2021-11-07 01:43:19,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:19,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:20,413 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:20,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014199800] [2021-11-07 01:43:20,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014199800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:20,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:20,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:43:20,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37668558] [2021-11-07 01:43:20,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:20,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:20,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:20,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:20,417 INFO L87 Difference]: Start difference. First operand 451 states and 765 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:20,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:20,547 INFO L93 Difference]: Finished difference Result 482 states and 812 transitions. [2021-11-07 01:43:20,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:20,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-11-07 01:43:20,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:20,551 INFO L225 Difference]: With dead ends: 482 [2021-11-07 01:43:20,552 INFO L226 Difference]: Without dead ends: 461 [2021-11-07 01:43:20,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:20,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-07 01:43:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 453. [2021-11-07 01:43:20,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.6946902654867257) internal successors, (766), 452 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:20,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 766 transitions. [2021-11-07 01:43:20,569 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 766 transitions. Word has length 134 [2021-11-07 01:43:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:20,570 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 766 transitions. [2021-11-07 01:43:20,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:20,571 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 766 transitions. [2021-11-07 01:43:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 01:43:20,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:20,573 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:20,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 01:43:20,574 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:20,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:20,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1034047660, now seen corresponding path program 1 times [2021-11-07 01:43:20,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:20,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709128147] [2021-11-07 01:43:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:20,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:21,561 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:21,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709128147] [2021-11-07 01:43:21,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709128147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:21,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:21,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 01:43:21,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25813824] [2021-11-07 01:43:21,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:43:21,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:43:21,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:21,564 INFO L87 Difference]: Start difference. First operand 453 states and 766 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:21,700 INFO L93 Difference]: Finished difference Result 482 states and 809 transitions. [2021-11-07 01:43:21,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:43:21,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-11-07 01:43:21,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:21,706 INFO L225 Difference]: With dead ends: 482 [2021-11-07 01:43:21,706 INFO L226 Difference]: Without dead ends: 461 [2021-11-07 01:43:21,707 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:43:21,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-11-07 01:43:21,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 454. [2021-11-07 01:43:21,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.6931567328918322) internal successors, (767), 453 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 767 transitions. [2021-11-07 01:43:21,722 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 767 transitions. Word has length 136 [2021-11-07 01:43:21,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:21,722 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 767 transitions. [2021-11-07 01:43:21,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:21,723 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 767 transitions. [2021-11-07 01:43:21,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-07 01:43:21,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:21,725 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:21,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 01:43:21,726 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:21,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:21,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1978571602, now seen corresponding path program 1 times [2021-11-07 01:43:21,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:21,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807318868] [2021-11-07 01:43:21,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:21,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:21,981 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:21,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807318868] [2021-11-07 01:43:21,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807318868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:43:21,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:43:21,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 01:43:21,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824099164] [2021-11-07 01:43:21,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:43:21,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:43:21,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:43:21,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:43:21,984 INFO L87 Difference]: Start difference. First operand 454 states and 767 transitions. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:22,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:43:22,215 INFO L93 Difference]: Finished difference Result 505 states and 847 transitions. [2021-11-07 01:43:22,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:43:22,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-11-07 01:43:22,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:43:22,220 INFO L225 Difference]: With dead ends: 505 [2021-11-07 01:43:22,221 INFO L226 Difference]: Without dead ends: 484 [2021-11-07 01:43:22,221 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:43:22,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-07 01:43:22,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 457. [2021-11-07 01:43:22,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 456 states have (on average 1.6864035087719298) internal successors, (769), 456 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:22,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 769 transitions. [2021-11-07 01:43:22,239 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 769 transitions. Word has length 137 [2021-11-07 01:43:22,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:43:22,240 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 769 transitions. [2021-11-07 01:43:22,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:43:22,240 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 769 transitions. [2021-11-07 01:43:22,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 01:43:22,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:43:22,243 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:43:22,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 01:43:22,244 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:43:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:43:22,244 INFO L85 PathProgramCache]: Analyzing trace with hash 381667338, now seen corresponding path program 1 times [2021-11-07 01:43:22,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:43:22,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362170530] [2021-11-07 01:43:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:22,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:43:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:43:26,094 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:43:26,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362170530] [2021-11-07 01:43:26,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362170530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 01:43:26,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799979461] [2021-11-07 01:43:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:43:26,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:43:26,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:43:26,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:43:26,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61a157f1-ec67-4703-8f61-ea98a95f8a0f/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 01:43:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:43:26,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 782 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 01:43:26,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:37,035 INFO L328 TraceCheckSpWp]: Computing backward predicates...