./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI --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 3cf612fb43c98d640569a1c9328794313185fe1b6a4dbfc7e502cbb16fa8754d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 04:09:32,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:09:32,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:09:32,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:09:32,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:09:32,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:09:32,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:09:32,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:09:32,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:09:32,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:09:32,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:09:32,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:09:32,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:09:32,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:09:32,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:09:32,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:09:32,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:09:32,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:09:32,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:09:32,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:09:32,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:09:32,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:09:32,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:09:32,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:09:32,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:09:32,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:09:32,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:09:32,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:09:32,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:09:32,365 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:09:32,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:09:32,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:09:32,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:09:32,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:09:32,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:09:32,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:09:32,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:09:32,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:09:32,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:09:32,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:09:32,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:09:32,375 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 04:09:32,397 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:09:32,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:09:32,398 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:09:32,399 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:09:32,399 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:09:32,400 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:09:32,400 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:09:32,400 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:09:32,401 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:09:32,401 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:09:32,401 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:09:32,401 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:09:32,402 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:09:32,402 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:09:32,402 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:09:32,403 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:09:32,403 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:09:32,403 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:09:32,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:09:32,408 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 04:09:32,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:09:32,408 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 04:09:32,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:09:32,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:09:32,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:09:32,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:09:32,410 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 04:09:32,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:09:32,410 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:09:32,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:09:32,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:09:32,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:09:32,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:09:32,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:09:32,414 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:09:32,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:09:32,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:09:32,415 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:09:32,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:09:32,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:09:32,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:09:32,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3cf612fb43c98d640569a1c9328794313185fe1b6a4dbfc7e502cbb16fa8754d [2022-11-03 04:09:32,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:09:32,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:09:32,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:09:32,713 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:09:32,713 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:09:32,715 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2022-11-03 04:09:32,791 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/data/6ba10f139/a63fdac749e7449a99694f1d5f675b09/FLAGe1a26246a [2022-11-03 04:09:33,337 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:09:33,338 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2022-11-03 04:09:33,348 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/data/6ba10f139/a63fdac749e7449a99694f1d5f675b09/FLAGe1a26246a [2022-11-03 04:09:33,685 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/data/6ba10f139/a63fdac749e7449a99694f1d5f675b09 [2022-11-03 04:09:33,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:09:33,689 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:09:33,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:09:33,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:09:33,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:09:33,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:09:33" (1/1) ... [2022-11-03 04:09:33,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b915399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:33, skipping insertion in model container [2022-11-03 04:09:33,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:09:33" (1/1) ... [2022-11-03 04:09:33,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:09:33,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:09:34,118 WARN L230 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_82d16c31-0f93-41d8-8c32-fb9ec705ee71/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c[7633,7646] [2022-11-03 04:09:34,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:09:34,190 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:09:34,256 WARN L230 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_82d16c31-0f93-41d8-8c32-fb9ec705ee71/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c[7633,7646] [2022-11-03 04:09:34,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:09:34,297 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:09:34,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:34 WrapperNode [2022-11-03 04:09:34,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:09:34,299 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:09:34,299 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:09:34,299 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:09:34,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:34" (1/1) ... [2022-11-03 04:09:34,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:34" (1/1) ... [2022-11-03 04:09:34,352 INFO L138 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 577 [2022-11-03 04:09:34,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:09:34,353 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:09:34,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:09:34,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:09:34,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:34" (1/1) ... [2022-11-03 04:09:34,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:34" (1/1) ... [2022-11-03 04:09:34,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:34" (1/1) ... [2022-11-03 04:09:34,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:34" (1/1) ... [2022-11-03 04:09:34,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:34" (1/1) ... [2022-11-03 04:09:34,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:34" (1/1) ... [2022-11-03 04:09:34,394 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:34" (1/1) ... [2022-11-03 04:09:34,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:34" (1/1) ... [2022-11-03 04:09:34,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:09:34,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:09:34,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:09:34,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:09:34,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:34" (1/1) ... [2022-11-03 04:09:34,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:09:34,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:09:34,455 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:09:34,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:09:34,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:09:34,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:09:34,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:09:34,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:09:34,709 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:09:34,726 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:09:35,411 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:09:35,619 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:09:35,619 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 04:09:35,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:09:35 BoogieIcfgContainer [2022-11-03 04:09:35,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:09:35,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:09:35,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:09:35,632 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:09:35,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:09:33" (1/3) ... [2022-11-03 04:09:35,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6625d19c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:09:35, skipping insertion in model container [2022-11-03 04:09:35,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:09:34" (2/3) ... [2022-11-03 04:09:35,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6625d19c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:09:35, skipping insertion in model container [2022-11-03 04:09:35,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:09:35" (3/3) ... [2022-11-03 04:09:35,635 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.BOUNDED-14.pals.c.v+cfa-reducer.c [2022-11-03 04:09:35,655 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:09:35,656 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:09:35,736 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:09:35,754 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@43958b04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:09:35,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:09:35,764 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 103 states have (on average 1.7572815533980584) internal successors, (181), 104 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 04:09:35,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:35,780 INFO L195 NwaCegarLoop]: 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] [2022-11-03 04:09:35,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:35,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:35,788 INFO L85 PathProgramCache]: Analyzing trace with hash 109996252, now seen corresponding path program 1 times [2022-11-03 04:09:35,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:09:35,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931192133] [2022-11-03 04:09:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:35,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:09:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:36,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:09:36,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931192133] [2022-11-03 04:09:36,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931192133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:09:36,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:09:36,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:09:36,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109257698] [2022-11-03 04:09:36,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:09:36,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:09:36,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:09:36,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:09:36,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:09:36,509 INFO L87 Difference]: Start difference. First operand has 105 states, 103 states have (on average 1.7572815533980584) internal successors, (181), 104 states have internal predecessors, (181), 0 states have call successors, (0), 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 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:36,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:36,684 INFO L93 Difference]: Finished difference Result 207 states and 331 transitions. [2022-11-03 04:09:36,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:09:36,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-11-03 04:09:36,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:36,702 INFO L225 Difference]: With dead ends: 207 [2022-11-03 04:09:36,702 INFO L226 Difference]: Without dead ends: 150 [2022-11-03 04:09:36,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:09:36,710 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 120 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:36,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 297 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:09:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-03 04:09:36,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2022-11-03 04:09:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.3197278911564625) internal successors, (194), 147 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 194 transitions. [2022-11-03 04:09:36,805 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 194 transitions. Word has length 71 [2022-11-03 04:09:36,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:36,806 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 194 transitions. [2022-11-03 04:09:36,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 194 transitions. [2022-11-03 04:09:36,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-03 04:09:36,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:36,808 INFO L195 NwaCegarLoop]: 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] [2022-11-03 04:09:36,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:09:36,809 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:36,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:36,810 INFO L85 PathProgramCache]: Analyzing trace with hash 369439699, now seen corresponding path program 1 times [2022-11-03 04:09:36,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:09:36,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479761815] [2022-11-03 04:09:36,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:36,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:09:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:37,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:09:37,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479761815] [2022-11-03 04:09:37,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479761815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:09:37,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:09:37,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:09:37,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621542290] [2022-11-03 04:09:37,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:09:37,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:09:37,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:09:37,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:09:37,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:09:37,038 INFO L87 Difference]: Start difference. First operand 148 states and 194 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:37,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:37,146 INFO L93 Difference]: Finished difference Result 332 states and 466 transitions. [2022-11-03 04:09:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:09:37,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2022-11-03 04:09:37,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:37,152 INFO L225 Difference]: With dead ends: 332 [2022-11-03 04:09:37,152 INFO L226 Difference]: Without dead ends: 236 [2022-11-03 04:09:37,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:09:37,161 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 67 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:37,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 236 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:09:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-11-03 04:09:37,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2022-11-03 04:09:37,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.3776824034334765) internal successors, (321), 233 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:37,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 321 transitions. [2022-11-03 04:09:37,220 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 321 transitions. Word has length 74 [2022-11-03 04:09:37,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:37,223 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 321 transitions. [2022-11-03 04:09:37,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:37,225 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 321 transitions. [2022-11-03 04:09:37,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 04:09:37,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:37,232 INFO L195 NwaCegarLoop]: 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] [2022-11-03 04:09:37,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 04:09:37,233 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:37,233 INFO L85 PathProgramCache]: Analyzing trace with hash 217690980, now seen corresponding path program 1 times [2022-11-03 04:09:37,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:09:37,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255661609] [2022-11-03 04:09:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:37,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:09:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:37,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:09:37,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255661609] [2022-11-03 04:09:37,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255661609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:09:37,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:09:37,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:09:37,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892668372] [2022-11-03 04:09:37,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:09:37,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:09:37,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:09:37,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:09:37,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:09:37,421 INFO L87 Difference]: Start difference. First operand 234 states and 321 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:37,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:37,520 INFO L93 Difference]: Finished difference Result 582 states and 835 transitions. [2022-11-03 04:09:37,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:09:37,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-03 04:09:37,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:37,526 INFO L225 Difference]: With dead ends: 582 [2022-11-03 04:09:37,526 INFO L226 Difference]: Without dead ends: 400 [2022-11-03 04:09:37,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:09:37,538 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 62 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:37,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 232 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:09:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-03 04:09:37,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 398. [2022-11-03 04:09:37,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 1.4130982367758187) internal successors, (561), 397 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 561 transitions. [2022-11-03 04:09:37,605 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 561 transitions. Word has length 77 [2022-11-03 04:09:37,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:37,608 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 561 transitions. [2022-11-03 04:09:37,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:37,608 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 561 transitions. [2022-11-03 04:09:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 04:09:37,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:37,612 INFO L195 NwaCegarLoop]: 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] [2022-11-03 04:09:37,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 04:09:37,613 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:37,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:37,616 INFO L85 PathProgramCache]: Analyzing trace with hash 221275412, now seen corresponding path program 1 times [2022-11-03 04:09:37,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:09:37,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852162162] [2022-11-03 04:09:37,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:37,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:09:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:37,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:09:37,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852162162] [2022-11-03 04:09:37,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852162162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:09:37,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:09:37,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:09:37,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127318210] [2022-11-03 04:09:37,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:09:37,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:09:37,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:09:37,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:09:37,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:09:37,801 INFO L87 Difference]: Start difference. First operand 398 states and 561 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:37,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:37,958 INFO L93 Difference]: Finished difference Result 1058 states and 1531 transitions. [2022-11-03 04:09:37,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:09:37,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-11-03 04:09:37,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:37,963 INFO L225 Difference]: With dead ends: 1058 [2022-11-03 04:09:37,963 INFO L226 Difference]: Without dead ends: 712 [2022-11-03 04:09:37,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:09:37,972 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 57 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:37,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 228 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:09:37,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-11-03 04:09:38,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 710. [2022-11-03 04:09:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 1.4287729196050776) internal successors, (1013), 709 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:38,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1013 transitions. [2022-11-03 04:09:38,103 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1013 transitions. Word has length 80 [2022-11-03 04:09:38,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:38,103 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 1013 transitions. [2022-11-03 04:09:38,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:38,104 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1013 transitions. [2022-11-03 04:09:38,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-03 04:09:38,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:38,105 INFO L195 NwaCegarLoop]: 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] [2022-11-03 04:09:38,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 04:09:38,105 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:38,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:38,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1465892275, now seen corresponding path program 1 times [2022-11-03 04:09:38,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:09:38,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518836778] [2022-11-03 04:09:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:38,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:09:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:38,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:09:38,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518836778] [2022-11-03 04:09:38,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518836778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:09:38,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:09:38,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:09:38,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608989319] [2022-11-03 04:09:38,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:09:38,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:09:38,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:09:38,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:09:38,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:09:38,191 INFO L87 Difference]: Start difference. First operand 710 states and 1013 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:38,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:38,506 INFO L93 Difference]: Finished difference Result 1962 states and 2839 transitions. [2022-11-03 04:09:38,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:09:38,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2022-11-03 04:09:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:38,513 INFO L225 Difference]: With dead ends: 1962 [2022-11-03 04:09:38,513 INFO L226 Difference]: Without dead ends: 1304 [2022-11-03 04:09:38,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:09:38,516 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 52 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:38,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 224 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:09:38,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2022-11-03 04:09:38,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1302. [2022-11-03 04:09:38,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 1.4304381245196003) internal successors, (1861), 1301 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:38,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1861 transitions. [2022-11-03 04:09:38,755 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1861 transitions. Word has length 83 [2022-11-03 04:09:38,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:38,756 INFO L495 AbstractCegarLoop]: Abstraction has 1302 states and 1861 transitions. [2022-11-03 04:09:38,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:38,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1861 transitions. [2022-11-03 04:09:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-03 04:09:38,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:38,768 INFO L195 NwaCegarLoop]: 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] [2022-11-03 04:09:38,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 04:09:38,768 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:38,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1801422560, now seen corresponding path program 1 times [2022-11-03 04:09:38,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:09:38,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940281229] [2022-11-03 04:09:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:38,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:09:38,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:38,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:09:38,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940281229] [2022-11-03 04:09:38,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940281229] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:09:38,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:09:38,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:09:38,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131206204] [2022-11-03 04:09:38,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:09:38,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:09:38,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:09:38,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:09:38,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:09:38,874 INFO L87 Difference]: Start difference. First operand 1302 states and 1861 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:39,414 INFO L93 Difference]: Finished difference Result 3674 states and 5287 transitions. [2022-11-03 04:09:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:09:39,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2022-11-03 04:09:39,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:39,424 INFO L225 Difference]: With dead ends: 3674 [2022-11-03 04:09:39,424 INFO L226 Difference]: Without dead ends: 2424 [2022-11-03 04:09:39,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:09:39,428 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 47 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:39,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 220 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:09:39,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2022-11-03 04:09:39,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 2422. [2022-11-03 04:09:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 2421 states have (on average 1.4229657166460141) internal successors, (3445), 2421 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 3445 transitions. [2022-11-03 04:09:39,828 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 3445 transitions. Word has length 86 [2022-11-03 04:09:39,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:39,829 INFO L495 AbstractCegarLoop]: Abstraction has 2422 states and 3445 transitions. [2022-11-03 04:09:39,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:39,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 3445 transitions. [2022-11-03 04:09:39,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 04:09:39,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:39,830 INFO L195 NwaCegarLoop]: 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] [2022-11-03 04:09:39,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 04:09:39,831 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:39,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:39,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1518929351, now seen corresponding path program 1 times [2022-11-03 04:09:39,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:09:39,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365575193] [2022-11-03 04:09:39,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:39,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:09:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:39,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:09:39,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365575193] [2022-11-03 04:09:39,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365575193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:09:39,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:09:39,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:09:39,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131513740] [2022-11-03 04:09:39,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:09:39,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:09:39,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:09:39,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:09:39,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:09:39,937 INFO L87 Difference]: Start difference. First operand 2422 states and 3445 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:40,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:40,734 INFO L93 Difference]: Finished difference Result 6906 states and 9847 transitions. [2022-11-03 04:09:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:09:40,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-11-03 04:09:40,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:40,752 INFO L225 Difference]: With dead ends: 6906 [2022-11-03 04:09:40,753 INFO L226 Difference]: Without dead ends: 4536 [2022-11-03 04:09:40,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:09:40,759 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 42 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:40,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 216 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:09:40,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2022-11-03 04:09:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 4534. [2022-11-03 04:09:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4534 states, 4533 states have (on average 1.4094418707257887) internal successors, (6389), 4533 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:41,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4534 states to 4534 states and 6389 transitions. [2022-11-03 04:09:41,386 INFO L78 Accepts]: Start accepts. Automaton has 4534 states and 6389 transitions. Word has length 89 [2022-11-03 04:09:41,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:41,386 INFO L495 AbstractCegarLoop]: Abstraction has 4534 states and 6389 transitions. [2022-11-03 04:09:41,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:41,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4534 states and 6389 transitions. [2022-11-03 04:09:41,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 04:09:41,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:41,388 INFO L195 NwaCegarLoop]: 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] [2022-11-03 04:09:41,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 04:09:41,389 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:41,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:41,389 INFO L85 PathProgramCache]: Analyzing trace with hash 441200141, now seen corresponding path program 1 times [2022-11-03 04:09:41,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:09:41,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505095442] [2022-11-03 04:09:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:41,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:09:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:41,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:41,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:09:41,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505095442] [2022-11-03 04:09:41,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505095442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:09:41,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:09:41,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 04:09:41,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753986494] [2022-11-03 04:09:41,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:09:41,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:09:41,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:09:41,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:09:41,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:09:41,662 INFO L87 Difference]: Start difference. First operand 4534 states and 6389 transitions. Second operand has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:44,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:44,362 INFO L93 Difference]: Finished difference Result 18170 states and 25800 transitions. [2022-11-03 04:09:44,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 04:09:44,363 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-03 04:09:44,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:44,416 INFO L225 Difference]: With dead ends: 18170 [2022-11-03 04:09:44,416 INFO L226 Difference]: Without dead ends: 13688 [2022-11-03 04:09:44,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-11-03 04:09:44,425 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 1102 mSDsluCounter, 3220 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 3279 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:44,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1102 Valid, 3279 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:09:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13688 states. [2022-11-03 04:09:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13688 to 5938. [2022-11-03 04:09:45,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5938 states, 5937 states have (on average 1.3986862051541182) internal successors, (8304), 5937 states have internal predecessors, (8304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:45,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5938 states to 5938 states and 8304 transitions. [2022-11-03 04:09:45,460 INFO L78 Accepts]: Start accepts. Automaton has 5938 states and 8304 transitions. Word has length 92 [2022-11-03 04:09:45,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:45,460 INFO L495 AbstractCegarLoop]: Abstraction has 5938 states and 8304 transitions. [2022-11-03 04:09:45,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:45,461 INFO L276 IsEmpty]: Start isEmpty. Operand 5938 states and 8304 transitions. [2022-11-03 04:09:45,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 04:09:45,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:45,462 INFO L195 NwaCegarLoop]: 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] [2022-11-03 04:09:45,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 04:09:45,463 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:45,463 INFO L85 PathProgramCache]: Analyzing trace with hash -2120384258, now seen corresponding path program 1 times [2022-11-03 04:09:45,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:09:45,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252429446] [2022-11-03 04:09:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:45,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:09:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:45,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:45,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:09:45,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252429446] [2022-11-03 04:09:45,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252429446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:09:45,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:09:45,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:09:45,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683914637] [2022-11-03 04:09:45,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:09:45,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:09:45,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:09:45,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:09:45,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:09:45,564 INFO L87 Difference]: Start difference. First operand 5938 states and 8304 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:46,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:46,932 INFO L93 Difference]: Finished difference Result 15216 states and 21418 transitions. [2022-11-03 04:09:46,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:09:46,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2022-11-03 04:09:46,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:46,968 INFO L225 Difference]: With dead ends: 15216 [2022-11-03 04:09:46,968 INFO L226 Difference]: Without dead ends: 9330 [2022-11-03 04:09:46,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:09:46,979 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 36 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:46,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 183 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 04:09:46,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2022-11-03 04:09:48,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 9328. [2022-11-03 04:09:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.4045244987670205) internal successors, (13100), 9327 states have internal predecessors, (13100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 13100 transitions. [2022-11-03 04:09:48,216 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 13100 transitions. Word has length 94 [2022-11-03 04:09:48,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:48,217 INFO L495 AbstractCegarLoop]: Abstraction has 9328 states and 13100 transitions. [2022-11-03 04:09:48,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:48,217 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 13100 transitions. [2022-11-03 04:09:48,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 04:09:48,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:48,218 INFO L195 NwaCegarLoop]: 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] [2022-11-03 04:09:48,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 04:09:48,219 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:48,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:48,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2109242424, now seen corresponding path program 1 times [2022-11-03 04:09:48,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:09:48,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431789785] [2022-11-03 04:09:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:48,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:09:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:48,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:09:48,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431789785] [2022-11-03 04:09:48,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431789785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:09:48,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:09:48,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 04:09:48,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779211895] [2022-11-03 04:09:48,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:09:48,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:09:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:09:48,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:09:48,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-03 04:09:48,713 INFO L87 Difference]: Start difference. First operand 9328 states and 13100 transitions. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:50,217 INFO L93 Difference]: Finished difference Result 18604 states and 26147 transitions. [2022-11-03 04:09:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:09:50,218 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2022-11-03 04:09:50,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:50,238 INFO L225 Difference]: With dead ends: 18604 [2022-11-03 04:09:50,238 INFO L226 Difference]: Without dead ends: 9330 [2022-11-03 04:09:50,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-11-03 04:09:50,251 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 550 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:50,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 552 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:09:50,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2022-11-03 04:09:51,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 9328. [2022-11-03 04:09:51,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.4043100675458347) internal successors, (13098), 9327 states have internal predecessors, (13098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:51,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 13098 transitions. [2022-11-03 04:09:51,908 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 13098 transitions. Word has length 94 [2022-11-03 04:09:51,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:51,908 INFO L495 AbstractCegarLoop]: Abstraction has 9328 states and 13098 transitions. [2022-11-03 04:09:51,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:51,909 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 13098 transitions. [2022-11-03 04:09:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 04:09:51,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:51,910 INFO L195 NwaCegarLoop]: 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] [2022-11-03 04:09:51,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 04:09:51,910 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:51,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:51,910 INFO L85 PathProgramCache]: Analyzing trace with hash -954054155, now seen corresponding path program 1 times [2022-11-03 04:09:51,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:09:51,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027478579] [2022-11-03 04:09:51,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:51,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:09:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:52,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:09:52,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027478579] [2022-11-03 04:09:52,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027478579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:09:52,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:09:52,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:09:52,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313284960] [2022-11-03 04:09:52,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:09:52,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:09:52,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:09:52,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:09:52,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:09:52,042 INFO L87 Difference]: Start difference. First operand 9328 states and 13098 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:53,270 INFO L93 Difference]: Finished difference Result 18602 states and 26142 transitions. [2022-11-03 04:09:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:09:53,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2022-11-03 04:09:53,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:53,292 INFO L225 Difference]: With dead ends: 18602 [2022-11-03 04:09:53,293 INFO L226 Difference]: Without dead ends: 9328 [2022-11-03 04:09:53,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:09:53,308 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 289 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:53,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 94 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:09:53,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2022-11-03 04:09:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2022-11-03 04:09:54,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3905864693899432) internal successors, (12970), 9327 states have internal predecessors, (12970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12970 transitions. [2022-11-03 04:09:54,551 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12970 transitions. Word has length 95 [2022-11-03 04:09:54,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:54,552 INFO L495 AbstractCegarLoop]: Abstraction has 9328 states and 12970 transitions. [2022-11-03 04:09:54,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12970 transitions. [2022-11-03 04:09:54,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 04:09:54,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:54,554 INFO L195 NwaCegarLoop]: 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] [2022-11-03 04:09:54,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 04:09:54,554 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:54,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:54,555 INFO L85 PathProgramCache]: Analyzing trace with hash -585782928, now seen corresponding path program 1 times [2022-11-03 04:09:54,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:09:54,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778883054] [2022-11-03 04:09:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:54,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:09:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:54,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:54,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:09:54,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778883054] [2022-11-03 04:09:54,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778883054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:09:54,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:09:54,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:09:54,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131159764] [2022-11-03 04:09:54,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:09:54,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:09:54,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:09:54,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:09:54,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:09:54,687 INFO L87 Difference]: Start difference. First operand 9328 states and 12970 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:56,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:09:56,309 INFO L93 Difference]: Finished difference Result 18602 states and 25886 transitions. [2022-11-03 04:09:56,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:09:56,310 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2022-11-03 04:09:56,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:09:56,332 INFO L225 Difference]: With dead ends: 18602 [2022-11-03 04:09:56,332 INFO L226 Difference]: Without dead ends: 9328 [2022-11-03 04:09:56,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:09:56,343 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 260 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:09:56,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 110 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:09:56,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2022-11-03 04:09:58,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2022-11-03 04:09:58,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3794360458882813) internal successors, (12866), 9327 states have internal predecessors, (12866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:58,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12866 transitions. [2022-11-03 04:09:58,424 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12866 transitions. Word has length 95 [2022-11-03 04:09:58,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:09:58,424 INFO L495 AbstractCegarLoop]: Abstraction has 9328 states and 12866 transitions. [2022-11-03 04:09:58,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:09:58,425 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12866 transitions. [2022-11-03 04:09:58,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 04:09:58,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:09:58,426 INFO L195 NwaCegarLoop]: 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] [2022-11-03 04:09:58,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 04:09:58,426 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:09:58,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:09:58,427 INFO L85 PathProgramCache]: Analyzing trace with hash -457697621, now seen corresponding path program 1 times [2022-11-03 04:09:58,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:09:58,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062157636] [2022-11-03 04:09:58,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:09:58,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:09:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:09:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:09:58,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:09:58,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062157636] [2022-11-03 04:09:58,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062157636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:09:58,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:09:58,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:09:58,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760195919] [2022-11-03 04:09:58,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:09:58,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:09:58,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:09:58,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:09:58,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:09:58,542 INFO L87 Difference]: Start difference. First operand 9328 states and 12866 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:00,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:00,370 INFO L93 Difference]: Finished difference Result 18602 states and 25678 transitions. [2022-11-03 04:10:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:10:00,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2022-11-03 04:10:00,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:00,385 INFO L225 Difference]: With dead ends: 18602 [2022-11-03 04:10:00,385 INFO L226 Difference]: Without dead ends: 9328 [2022-11-03 04:10:00,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:10:00,399 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 231 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:00,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 126 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:10:00,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2022-11-03 04:10:02,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2022-11-03 04:10:02,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.368928916050177) internal successors, (12768), 9327 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12768 transitions. [2022-11-03 04:10:02,344 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12768 transitions. Word has length 95 [2022-11-03 04:10:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:02,345 INFO L495 AbstractCegarLoop]: Abstraction has 9328 states and 12768 transitions. [2022-11-03 04:10:02,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12768 transitions. [2022-11-03 04:10:02,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 04:10:02,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:02,347 INFO L195 NwaCegarLoop]: 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] [2022-11-03 04:10:02,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 04:10:02,347 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:02,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:02,348 INFO L85 PathProgramCache]: Analyzing trace with hash -986988122, now seen corresponding path program 1 times [2022-11-03 04:10:02,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:02,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410292403] [2022-11-03 04:10:02,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:02,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:02,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:10:02,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410292403] [2022-11-03 04:10:02,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410292403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:02,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:02,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:10:02,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775948443] [2022-11-03 04:10:02,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:02,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:02,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:10:02,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:02,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:02,459 INFO L87 Difference]: Start difference. First operand 9328 states and 12768 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:04,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:04,281 INFO L93 Difference]: Finished difference Result 18602 states and 25482 transitions. [2022-11-03 04:10:04,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:10:04,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2022-11-03 04:10:04,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:04,294 INFO L225 Difference]: With dead ends: 18602 [2022-11-03 04:10:04,295 INFO L226 Difference]: Without dead ends: 9328 [2022-11-03 04:10:04,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:10:04,303 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 267 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:04,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 102 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:10:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2022-11-03 04:10:06,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2022-11-03 04:10:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3569207676637718) internal successors, (12656), 9327 states have internal predecessors, (12656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:06,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12656 transitions. [2022-11-03 04:10:06,423 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12656 transitions. Word has length 95 [2022-11-03 04:10:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:06,424 INFO L495 AbstractCegarLoop]: Abstraction has 9328 states and 12656 transitions. [2022-11-03 04:10:06,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:06,424 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12656 transitions. [2022-11-03 04:10:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 04:10:06,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:06,425 INFO L195 NwaCegarLoop]: 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] [2022-11-03 04:10:06,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 04:10:06,426 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:06,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:06,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1749851829, now seen corresponding path program 1 times [2022-11-03 04:10:06,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:06,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116313590] [2022-11-03 04:10:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:06,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:06,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:10:06,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116313590] [2022-11-03 04:10:06,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116313590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:06,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:06,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 04:10:06,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769327665] [2022-11-03 04:10:06,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:06,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 04:10:06,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:10:06,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 04:10:06,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 04:10:06,561 INFO L87 Difference]: Start difference. First operand 9328 states and 12656 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:08,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:08,460 INFO L93 Difference]: Finished difference Result 18602 states and 25258 transitions. [2022-11-03 04:10:08,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 04:10:08,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2022-11-03 04:10:08,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:08,470 INFO L225 Difference]: With dead ends: 18602 [2022-11-03 04:10:08,470 INFO L226 Difference]: Without dead ends: 9328 [2022-11-03 04:10:08,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 04:10:08,477 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 290 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:08,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 86 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:10:08,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9328 states. [2022-11-03 04:10:10,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9328 to 9328. [2022-11-03 04:10:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3397662699689075) internal successors, (12496), 9327 states have internal predecessors, (12496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12496 transitions. [2022-11-03 04:10:10,437 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12496 transitions. Word has length 95 [2022-11-03 04:10:10,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:10,438 INFO L495 AbstractCegarLoop]: Abstraction has 9328 states and 12496 transitions. [2022-11-03 04:10:10,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:10,438 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12496 transitions. [2022-11-03 04:10:10,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 04:10:10,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:10,440 INFO L195 NwaCegarLoop]: 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] [2022-11-03 04:10:10,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 04:10:10,440 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:10,441 INFO L85 PathProgramCache]: Analyzing trace with hash 803698352, now seen corresponding path program 1 times [2022-11-03 04:10:10,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:10,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520382409] [2022-11-03 04:10:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:10,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:10,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:10:10,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520382409] [2022-11-03 04:10:10,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520382409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:10:10,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:10:10,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 04:10:10,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66949026] [2022-11-03 04:10:10,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:10:10,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 04:10:10,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:10:10,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 04:10:10,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 04:10:10,782 INFO L87 Difference]: Start difference. First operand 9328 states and 12496 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:14,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:10:14,073 INFO L93 Difference]: Finished difference Result 12899 states and 17096 transitions. [2022-11-03 04:10:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:10:14,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 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 95 [2022-11-03 04:10:14,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:10:14,088 INFO L225 Difference]: With dead ends: 12899 [2022-11-03 04:10:14,088 INFO L226 Difference]: Without dead ends: 12897 [2022-11-03 04:10:14,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-03 04:10:14,092 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 166 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:10:14,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 661 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:10:14,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12897 states. [2022-11-03 04:10:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12897 to 9328. [2022-11-03 04:10:16,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9328 states, 9327 states have (on average 1.3329044708909616) internal successors, (12432), 9327 states have internal predecessors, (12432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:16,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9328 states to 9328 states and 12432 transitions. [2022-11-03 04:10:16,827 INFO L78 Accepts]: Start accepts. Automaton has 9328 states and 12432 transitions. Word has length 95 [2022-11-03 04:10:16,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:10:16,828 INFO L495 AbstractCegarLoop]: Abstraction has 9328 states and 12432 transitions. [2022-11-03 04:10:16,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 04:10:16,828 INFO L276 IsEmpty]: Start isEmpty. Operand 9328 states and 12432 transitions. [2022-11-03 04:10:16,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 04:10:16,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:10:16,830 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:10:16,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 04:10:16,831 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:10:16,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:10:16,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1935869303, now seen corresponding path program 1 times [2022-11-03 04:10:16,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:10:16,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699105904] [2022-11-03 04:10:16,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:16,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:10:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:10:39,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:10:39,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699105904] [2022-11-03 04:10:39,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699105904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:10:39,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271731777] [2022-11-03 04:10:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:10:39,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:10:39,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:10:39,088 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:10:39,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d16c31-0f93-41d8-8c32-fb9ec705ee71/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:10:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:10:39,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-03 04:10:39,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:11:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:11:31,868 INFO L328 TraceCheckSpWp]: Computing backward predicates...