./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.2.ufo.BOUNDED-8.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_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/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_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/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_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/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 1bb463b167b254c80aafe9ad09b54a56308dc50dcf4a4adbb2aa58670e8927d0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:11:31,256 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:11:31,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:11:31,289 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:11:31,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:11:31,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:11:31,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:11:31,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:11:31,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:11:31,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:11:31,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:11:31,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:11:31,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:11:31,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:11:31,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:11:31,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:11:31,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:11:31,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:11:31,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:11:31,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:11:31,316 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:11:31,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:11:31,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:11:31,320 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:11:31,324 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:11:31,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:11:31,325 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:11:31,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:11:31,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:11:31,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:11:31,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:11:31,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:11:31,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:11:31,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:11:31,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:11:31,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:11:31,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:11:31,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:11:31,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:11:31,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:11:31,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:11:31,341 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:11:31,384 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:11:31,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:11:31,386 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:11:31,386 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:11:31,386 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:11:31,387 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:11:31,387 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:11:31,387 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:11:31,387 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:11:31,388 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:11:31,389 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:11:31,389 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:11:31,389 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:11:31,390 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:11:31,390 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:11:31,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:11:31,391 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:11:31,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:11:31,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:11:31,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:11:31,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:11:31,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:11:31,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:11:31,393 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:11:31,393 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:11:31,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:11:31,394 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:11:31,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:11:31,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:11:31,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:11:31,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:11:31,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:11:31,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:11:31,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:11:31,398 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:11:31,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:11:31,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:11:31,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:11:31,399 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:11:31,399 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_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bb463b167b254c80aafe9ad09b54a56308dc50dcf4a4adbb2aa58670e8927d0 [2021-11-07 02:11:31,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:11:31,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:11:31,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:11:31,725 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:11:31,725 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:11:31,726 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c [2021-11-07 02:11:31,800 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/bin/utaipan-UUZaoUuFF8/data/4561e09d3/091a82c762b64bcb889a664c6dfe0e26/FLAG72508ea7b [2021-11-07 02:11:32,375 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:11:32,376 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c [2021-11-07 02:11:32,392 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/bin/utaipan-UUZaoUuFF8/data/4561e09d3/091a82c762b64bcb889a664c6dfe0e26/FLAG72508ea7b [2021-11-07 02:11:32,685 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/bin/utaipan-UUZaoUuFF8/data/4561e09d3/091a82c762b64bcb889a664c6dfe0e26 [2021-11-07 02:11:32,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:11:32,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:11:32,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:11:32,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:11:32,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:11:32,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:32" (1/1) ... [2021-11-07 02:11:32,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510bbce9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:32, skipping insertion in model container [2021-11-07 02:11:32,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:11:32" (1/1) ... [2021-11-07 02:11:32,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:11:32,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:11:33,115 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_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c[30998,31011] [2021-11-07 02:11:33,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:11:33,129 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:11:33,255 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_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c[30998,31011] [2021-11-07 02:11:33,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:11:33,274 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:11:33,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:33 WrapperNode [2021-11-07 02:11:33,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:11:33,276 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:11:33,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:11:33,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:11:33,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:33" (1/1) ... [2021-11-07 02:11:33,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:33" (1/1) ... [2021-11-07 02:11:33,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:11:33,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:11:33,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:11:33,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:11:33,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:33" (1/1) ... [2021-11-07 02:11:33,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:33" (1/1) ... [2021-11-07 02:11:33,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:33" (1/1) ... [2021-11-07 02:11:33,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:33" (1/1) ... [2021-11-07 02:11:33,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:33" (1/1) ... [2021-11-07 02:11:33,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:33" (1/1) ... [2021-11-07 02:11:33,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:33" (1/1) ... [2021-11-07 02:11:33,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:11:33,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:11:33,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:11:33,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:11:33,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:33" (1/1) ... [2021-11-07 02:11:33,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:11:33,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:11:33,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:11:33,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:11:33,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 02:11:33,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:11:33,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:11:33,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:11:38,836 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:11:38,837 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2021-11-07 02:11:38,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:11:38 BoogieIcfgContainer [2021-11-07 02:11:38,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:11:38,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:11:38,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:11:38,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:11:38,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:11:32" (1/3) ... [2021-11-07 02:11:38,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5600c864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:11:38, skipping insertion in model container [2021-11-07 02:11:38,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:11:33" (2/3) ... [2021-11-07 02:11:38,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5600c864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:11:38, skipping insertion in model container [2021-11-07 02:11:38,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:11:38" (3/3) ... [2021-11-07 02:11:38,850 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.2.ufo.BOUNDED-8.pals.c [2021-11-07 02:11:38,856 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:11:38,856 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:11:38,922 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:11:38,930 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 02:11:38,931 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:11:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 0 states have call successors, (0), 0 states 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 02:11:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 02:11:38,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:38,981 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] [2021-11-07 02:11:38,982 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:38,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:38,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2052787534, now seen corresponding path program 1 times [2021-11-07 02:11:39,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:11:39,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456302792] [2021-11-07 02:11:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:39,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:11:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:39,929 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 02:11:39,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:11:39,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456302792] [2021-11-07 02:11:39,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456302792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:39,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:39,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:11:39,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489432939] [2021-11-07 02:11:39,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:11:39,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:11:39,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:11:39,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:11:39,954 INFO L87 Difference]: Start difference. First operand has 140 states, 138 states have (on average 1.6231884057971016) internal successors, (224), 139 states have internal predecessors, (224), 0 states have call successors, (0), 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 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 02:11:40,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:40,162 INFO L93 Difference]: Finished difference Result 180 states and 288 transitions. [2021-11-07 02:11:40,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:11:40,164 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-11-07 02:11:40,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:40,182 INFO L225 Difference]: With dead ends: 180 [2021-11-07 02:11:40,183 INFO L226 Difference]: Without dead ends: 158 [2021-11-07 02:11:40,187 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 02:11:40,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-07 02:11:40,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2021-11-07 02:11:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6122448979591837) internal successors, (237), 147 states have internal predecessors, (237), 0 states have call successors, (0), 0 states 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 02:11:40,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 237 transitions. [2021-11-07 02:11:40,255 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 237 transitions. Word has length 54 [2021-11-07 02:11:40,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:40,256 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 237 transitions. [2021-11-07 02:11:40,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 02:11:40,257 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 237 transitions. [2021-11-07 02:11:40,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 02:11:40,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:40,260 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] [2021-11-07 02:11:40,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 02:11:40,261 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:40,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:40,262 INFO L85 PathProgramCache]: Analyzing trace with hash -856270581, now seen corresponding path program 1 times [2021-11-07 02:11:40,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:11:40,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024003942] [2021-11-07 02:11:40,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:40,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:11:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:40,597 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 02:11:40,598 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:11:40,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024003942] [2021-11-07 02:11:40,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024003942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:40,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:40,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:11:40,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407751435] [2021-11-07 02:11:40,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:11:40,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:11:40,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:11:40,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:11:40,605 INFO L87 Difference]: Start difference. First operand 148 states and 237 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 02:11:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:40,741 INFO L93 Difference]: Finished difference Result 180 states and 285 transitions. [2021-11-07 02:11:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:11:40,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-11-07 02:11:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:40,744 INFO L225 Difference]: With dead ends: 180 [2021-11-07 02:11:40,744 INFO L226 Difference]: Without dead ends: 160 [2021-11-07 02:11:40,745 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 02:11:40,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-07 02:11:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-07 02:11:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.6054421768707483) internal successors, (236), 147 states have internal predecessors, (236), 0 states have call successors, (0), 0 states 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 02:11:40,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 236 transitions. [2021-11-07 02:11:40,772 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 236 transitions. Word has length 55 [2021-11-07 02:11:40,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:40,775 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 236 transitions. [2021-11-07 02:11:40,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 02:11:40,776 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 236 transitions. [2021-11-07 02:11:40,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 02:11:40,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:40,781 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] [2021-11-07 02:11:40,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 02:11:40,783 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:40,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:40,790 INFO L85 PathProgramCache]: Analyzing trace with hash -837307177, now seen corresponding path program 1 times [2021-11-07 02:11:40,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:11:40,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404043190] [2021-11-07 02:11:40,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:40,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:11:40,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:40,980 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 02:11:40,981 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:11:40,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404043190] [2021-11-07 02:11:40,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404043190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:40,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:40,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:11:40,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922282839] [2021-11-07 02:11:40,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:11:40,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:11:40,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:11:40,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:11:40,989 INFO L87 Difference]: Start difference. First operand 148 states and 236 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 02:11:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:41,099 INFO L93 Difference]: Finished difference Result 180 states and 284 transitions. [2021-11-07 02:11:41,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:11:41,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-11-07 02:11:41,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:41,101 INFO L225 Difference]: With dead ends: 180 [2021-11-07 02:11:41,101 INFO L226 Difference]: Without dead ends: 160 [2021-11-07 02:11:41,102 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 02:11:41,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-07 02:11:41,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-07 02:11:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.598639455782313) internal successors, (235), 147 states have internal predecessors, (235), 0 states have call successors, (0), 0 states 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 02:11:41,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 235 transitions. [2021-11-07 02:11:41,116 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 235 transitions. Word has length 56 [2021-11-07 02:11:41,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:41,117 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 235 transitions. [2021-11-07 02:11:41,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states 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 02:11:41,117 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 235 transitions. [2021-11-07 02:11:41,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 02:11:41,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:41,123 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] [2021-11-07 02:11:41,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 02:11:41,124 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:41,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:41,125 INFO L85 PathProgramCache]: Analyzing trace with hash -243989900, now seen corresponding path program 1 times [2021-11-07 02:11:41,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:11:41,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657476986] [2021-11-07 02:11:41,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:41,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:11:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:41,358 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 02:11:41,358 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:11:41,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657476986] [2021-11-07 02:11:41,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657476986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:41,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:41,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:11:41,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577451556] [2021-11-07 02:11:41,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:11:41,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:11:41,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:11:41,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:11:41,361 INFO L87 Difference]: Start difference. First operand 148 states and 235 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 02:11:41,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:41,463 INFO L93 Difference]: Finished difference Result 180 states and 283 transitions. [2021-11-07 02:11:41,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:11:41,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-11-07 02:11:41,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:41,465 INFO L225 Difference]: With dead ends: 180 [2021-11-07 02:11:41,465 INFO L226 Difference]: Without dead ends: 160 [2021-11-07 02:11:41,466 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 02:11:41,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-07 02:11:41,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-07 02:11:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5918367346938775) internal successors, (234), 147 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 02:11:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 234 transitions. [2021-11-07 02:11:41,478 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 234 transitions. Word has length 57 [2021-11-07 02:11:41,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:41,480 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 234 transitions. [2021-11-07 02:11:41,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states 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 02:11:41,481 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 234 transitions. [2021-11-07 02:11:41,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 02:11:41,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:41,487 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] [2021-11-07 02:11:41,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 02:11:41,488 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:41,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:41,488 INFO L85 PathProgramCache]: Analyzing trace with hash 974428256, now seen corresponding path program 1 times [2021-11-07 02:11:41,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:11:41,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161799851] [2021-11-07 02:11:41,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:41,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:11:41,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:41,674 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 02:11:41,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:11:41,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161799851] [2021-11-07 02:11:41,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161799851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:41,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:41,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:11:41,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918176256] [2021-11-07 02:11:41,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:11:41,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:11:41,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:11:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:11:41,676 INFO L87 Difference]: Start difference. First operand 148 states and 234 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 02:11:41,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:41,774 INFO L93 Difference]: Finished difference Result 180 states and 282 transitions. [2021-11-07 02:11:41,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:11:41,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-11-07 02:11:41,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:41,776 INFO L225 Difference]: With dead ends: 180 [2021-11-07 02:11:41,776 INFO L226 Difference]: Without dead ends: 160 [2021-11-07 02:11:41,777 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 02:11:41,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-07 02:11:41,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-07 02:11:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5850340136054422) internal successors, (233), 147 states have internal predecessors, (233), 0 states have call successors, (0), 0 states 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 02:11:41,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 233 transitions. [2021-11-07 02:11:41,785 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 233 transitions. Word has length 58 [2021-11-07 02:11:41,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:41,785 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 233 transitions. [2021-11-07 02:11:41,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 02:11:41,786 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 233 transitions. [2021-11-07 02:11:41,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:11:41,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:41,787 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] [2021-11-07 02:11:41,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 02:11:41,787 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:41,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:41,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1353694200, now seen corresponding path program 1 times [2021-11-07 02:11:41,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:11:41,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863279540] [2021-11-07 02:11:41,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:41,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:11:41,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:42,076 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 02:11:42,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:11:42,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863279540] [2021-11-07 02:11:42,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863279540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:42,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:42,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:11:42,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145060777] [2021-11-07 02:11:42,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:11:42,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:11:42,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:11:42,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:11:42,080 INFO L87 Difference]: Start difference. First operand 148 states and 233 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 02:11:42,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:42,176 INFO L93 Difference]: Finished difference Result 178 states and 278 transitions. [2021-11-07 02:11:42,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:11:42,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-07 02:11:42,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:42,178 INFO L225 Difference]: With dead ends: 178 [2021-11-07 02:11:42,178 INFO L226 Difference]: Without dead ends: 158 [2021-11-07 02:11:42,178 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 02:11:42,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-07 02:11:42,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2021-11-07 02:11:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.5810810810810811) internal successors, (234), 148 states have internal predecessors, (234), 0 states have call successors, (0), 0 states 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 02:11:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 234 transitions. [2021-11-07 02:11:42,185 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 234 transitions. Word has length 60 [2021-11-07 02:11:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:42,186 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 234 transitions. [2021-11-07 02:11:42,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states 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 02:11:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 234 transitions. [2021-11-07 02:11:42,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:11:42,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:42,187 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] [2021-11-07 02:11:42,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 02:11:42,187 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:42,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:42,188 INFO L85 PathProgramCache]: Analyzing trace with hash 897137259, now seen corresponding path program 1 times [2021-11-07 02:11:42,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:11:42,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530375429] [2021-11-07 02:11:42,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:42,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:11:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:42,350 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 02:11:42,350 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:11:42,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530375429] [2021-11-07 02:11:42,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530375429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:42,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:42,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:11:42,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490565641] [2021-11-07 02:11:42,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:11:42,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:11:42,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:11:42,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:11:42,354 INFO L87 Difference]: Start difference. First operand 149 states and 234 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 02:11:42,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:42,437 INFO L93 Difference]: Finished difference Result 179 states and 279 transitions. [2021-11-07 02:11:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:11:42,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2021-11-07 02:11:42,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:42,439 INFO L225 Difference]: With dead ends: 179 [2021-11-07 02:11:42,439 INFO L226 Difference]: Without dead ends: 159 [2021-11-07 02:11:42,440 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 02:11:42,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-07 02:11:42,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2021-11-07 02:11:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.5666666666666667) internal successors, (235), 150 states have internal predecessors, (235), 0 states have call successors, (0), 0 states 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 02:11:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 235 transitions. [2021-11-07 02:11:42,448 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 235 transitions. Word has length 61 [2021-11-07 02:11:42,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:42,448 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 235 transitions. [2021-11-07 02:11:42,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 02:11:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 235 transitions. [2021-11-07 02:11:42,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:11:42,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:42,450 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] [2021-11-07 02:11:42,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 02:11:42,451 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:42,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:42,452 INFO L85 PathProgramCache]: Analyzing trace with hash 371436945, now seen corresponding path program 1 times [2021-11-07 02:11:42,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:11:42,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041603119] [2021-11-07 02:11:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:42,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:11:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:43,109 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 02:11:43,109 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:11:43,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041603119] [2021-11-07 02:11:43,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041603119] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:43,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:43,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 02:11:43,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312118814] [2021-11-07 02:11:43,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:11:43,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:11:43,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:11:43,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:11:43,112 INFO L87 Difference]: Start difference. First operand 151 states and 235 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 02:11:43,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:43,203 INFO L93 Difference]: Finished difference Result 179 states and 276 transitions. [2021-11-07 02:11:43,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:11:43,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-07 02:11:43,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:43,205 INFO L225 Difference]: With dead ends: 179 [2021-11-07 02:11:43,205 INFO L226 Difference]: Without dead ends: 159 [2021-11-07 02:11:43,205 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 02:11:43,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-07 02:11:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 152. [2021-11-07 02:11:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.5629139072847682) internal successors, (236), 151 states have internal predecessors, (236), 0 states have call successors, (0), 0 states 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 02:11:43,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 236 transitions. [2021-11-07 02:11:43,212 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 236 transitions. Word has length 63 [2021-11-07 02:11:43,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:43,213 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 236 transitions. [2021-11-07 02:11:43,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 02:11:43,213 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 236 transitions. [2021-11-07 02:11:43,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:11:43,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:43,214 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] [2021-11-07 02:11:43,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 02:11:43,215 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:43,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:43,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1376506426, now seen corresponding path program 1 times [2021-11-07 02:11:43,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:11:43,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198153826] [2021-11-07 02:11:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:43,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:11:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:43,411 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 02:11:43,411 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:11:43,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198153826] [2021-11-07 02:11:43,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198153826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 02:11:43,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:11:43,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 02:11:43,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980879106] [2021-11-07 02:11:43,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:11:43,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 02:11:43,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:11:43,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:11:43,414 INFO L87 Difference]: Start difference. First operand 152 states and 236 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 02:11:43,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:11:43,591 INFO L93 Difference]: Finished difference Result 201 states and 312 transitions. [2021-11-07 02:11:43,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:11:43,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-07 02:11:43,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:11:43,593 INFO L225 Difference]: With dead ends: 201 [2021-11-07 02:11:43,593 INFO L226 Difference]: Without dead ends: 181 [2021-11-07 02:11:43,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 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 02:11:43,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-07 02:11:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2021-11-07 02:11:43,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.5454545454545454) internal successors, (238), 154 states have internal predecessors, (238), 0 states have call successors, (0), 0 states 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 02:11:43,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 238 transitions. [2021-11-07 02:11:43,603 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 238 transitions. Word has length 64 [2021-11-07 02:11:43,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:11:43,604 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 238 transitions. [2021-11-07 02:11:43,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 02:11:43,604 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 238 transitions. [2021-11-07 02:11:43,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:11:43,605 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:11:43,605 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] [2021-11-07 02:11:43,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 02:11:43,606 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:11:43,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:11:43,607 INFO L85 PathProgramCache]: Analyzing trace with hash -2041458821, now seen corresponding path program 1 times [2021-11-07 02:11:43,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 02:11:43,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960895758] [2021-11-07 02:11:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:43,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 02:11:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:44,756 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 02:11:44,757 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 02:11:44,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960895758] [2021-11-07 02:11:44,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960895758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 02:11:44,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973822935] [2021-11-07 02:11:44,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:11:44,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:11:44,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:11:44,760 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:11:44,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fcffa26-cfc7-4592-8f15-c51c62bbf0b0/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 02:11:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:11:45,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 02:11:45,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:13:11,118 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 02:13:11,118 INFO L328 TraceCheckSpWp]: Computing backward predicates...