./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f4eb782e6042aea0609a33229d26d2fc0e173871777f83d353b448b155d9fa10 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:33:17,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:33:17,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:33:17,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:33:17,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:33:17,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:33:17,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:33:17,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:33:17,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:33:17,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:33:17,251 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:33:17,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:33:17,252 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:33:17,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:33:17,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:33:17,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:33:17,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:33:17,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:33:17,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:33:17,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:33:17,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:33:17,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:33:17,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:33:17,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:33:17,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:33:17,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:33:17,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:33:17,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:33:17,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:33:17,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:33:17,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:33:17,276 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:33:17,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:33:17,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:33:17,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:33:17,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:33:17,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:33:17,281 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:33:17,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:33:17,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:33:17,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:33:17,284 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 02:33:17,308 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:33:17,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:33:17,309 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:33:17,309 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:33:17,309 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:33:17,310 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:33:17,310 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:33:17,310 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:33:17,310 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:33:17,310 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:33:17,311 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:33:17,311 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:33:17,311 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:33:17,311 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:33:17,311 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:33:17,312 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:33:17,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:33:17,313 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 02:33:17,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:33:17,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 02:33:17,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:33:17,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:33:17,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:33:17,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:33:17,314 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:33:17,314 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 02:33:17,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:33:17,315 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:33:17,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:33:17,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:33:17,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:33:17,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:33:17,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:33:17,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:33:17,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:33:17,316 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:33:17,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:33:17,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:33:17,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:33:17,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:33:17,317 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4eb782e6042aea0609a33229d26d2fc0e173871777f83d353b448b155d9fa10 [2021-11-13 02:33:17,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:33:17,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:33:17,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:33:17,647 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:33:17,648 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:33:17,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2021-11-13 02:33:17,720 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/bin/utaipan-vmNK8stdcF/data/04013d917/32d38578b86c43fdaa8a4a985fd0ee22/FLAG581a8fbee [2021-11-13 02:33:18,399 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:33:18,399 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2021-11-13 02:33:18,426 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/bin/utaipan-vmNK8stdcF/data/04013d917/32d38578b86c43fdaa8a4a985fd0ee22/FLAG581a8fbee [2021-11-13 02:33:18,550 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/bin/utaipan-vmNK8stdcF/data/04013d917/32d38578b86c43fdaa8a4a985fd0ee22 [2021-11-13 02:33:18,553 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:33:18,555 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:33:18,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:33:18,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:33:18,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:33:18,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:33:18" (1/1) ... [2021-11-13 02:33:18,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f0727f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:18, skipping insertion in model container [2021-11-13 02:33:18,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:33:18" (1/1) ... [2021-11-13 02:33:18,572 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:33:18,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:33:19,373 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[30249,30262] [2021-11-13 02:33:19,479 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[33700,33713] [2021-11-13 02:33:19,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:33:19,750 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:33:20,048 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[30249,30262] [2021-11-13 02:33:20,111 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c[33700,33713] [2021-11-13 02:33:20,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:33:20,425 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:33:20,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:20 WrapperNode [2021-11-13 02:33:20,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:33:20,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:33:20,427 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:33:20,427 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:33:20,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:20" (1/1) ... [2021-11-13 02:33:20,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:20" (1/1) ... [2021-11-13 02:33:20,607 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:33:20,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:33:20,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:33:20,609 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:33:20,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:20" (1/1) ... [2021-11-13 02:33:20,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:20" (1/1) ... [2021-11-13 02:33:20,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:20" (1/1) ... [2021-11-13 02:33:20,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:20" (1/1) ... [2021-11-13 02:33:20,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:20" (1/1) ... [2021-11-13 02:33:20,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:20" (1/1) ... [2021-11-13 02:33:20,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:20" (1/1) ... [2021-11-13 02:33:20,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:33:20,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:33:20,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:33:20,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:33:20,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:20" (1/1) ... [2021-11-13 02:33:20,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:33:20,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:20,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:33:20,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23eb714-1f11-48ee-98a7-97be83d8fbfd/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:33:20,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 02:33:20,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:33:20,803 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:33:20,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:33:25,564 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:33:25,565 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 02:33:25,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:33:25 BoogieIcfgContainer [2021-11-13 02:33:25,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:33:25,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:33:25,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:33:25,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:33:25,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:33:18" (1/3) ... [2021-11-13 02:33:25,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233ee1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:33:25, skipping insertion in model container [2021-11-13 02:33:25,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:33:20" (2/3) ... [2021-11-13 02:33:25,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@233ee1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:33:25, skipping insertion in model container [2021-11-13 02:33:25,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:33:25" (3/3) ... [2021-11-13 02:33:25,587 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.ufo.BOUNDED-8.pals.c.p+lhb-reducer.c [2021-11-13 02:33:25,594 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:33:25,594 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 02:33:25,679 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:33:25,692 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:33:25,693 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 02:33:25,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 745 states, 742 states have (on average 1.6388140161725067) internal successors, (1216), 744 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:25,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-13 02:33:25,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:25,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:25,813 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:25,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:25,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1674305928, now seen corresponding path program 1 times [2021-11-13 02:33:25,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:25,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792175327] [2021-11-13 02:33:25,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:25,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:26,662 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:26,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792175327] [2021-11-13 02:33:26,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792175327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:26,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:26,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:26,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509955412] [2021-11-13 02:33:26,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:26,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:26,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:26,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:26,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:26,711 INFO L87 Difference]: Start difference. First operand has 745 states, 742 states have (on average 1.6388140161725067) internal successors, (1216), 744 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:27,293 INFO L93 Difference]: Finished difference Result 1782 states and 2917 transitions. [2021-11-13 02:33:27,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:27,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2021-11-13 02:33:27,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:27,324 INFO L225 Difference]: With dead ends: 1782 [2021-11-13 02:33:27,324 INFO L226 Difference]: Without dead ends: 1172 [2021-11-13 02:33:27,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:27,338 INFO L933 BasicCegarLoop]: 1481 mSDtfsCounter, 1772 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 345.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1772 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.12ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 411.47ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:27,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1772 Valid, 2415 Invalid, 194 Unknown, 0 Unchecked, 24.12ms Time], IncrementalHoareTripleChecker [30 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 411.47ms Time] [2021-11-13 02:33:27,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-11-13 02:33:27,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 1168. [2021-11-13 02:33:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1166 states have (on average 1.620926243567753) internal successors, (1890), 1167 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1890 transitions. [2021-11-13 02:33:27,567 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1890 transitions. Word has length 105 [2021-11-13 02:33:27,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:27,568 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 1890 transitions. [2021-11-13 02:33:27,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:27,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1890 transitions. [2021-11-13 02:33:27,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-13 02:33:27,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:27,577 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:27,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:33:27,578 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:27,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:27,580 INFO L85 PathProgramCache]: Analyzing trace with hash 242166310, now seen corresponding path program 1 times [2021-11-13 02:33:27,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:27,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702307351] [2021-11-13 02:33:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:27,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:27,848 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:27,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702307351] [2021-11-13 02:33:27,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702307351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:27,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:27,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:27,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267548304] [2021-11-13 02:33:27,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:27,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:27,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:27,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:27,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:27,858 INFO L87 Difference]: Start difference. First operand 1168 states and 1890 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:28,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:28,586 INFO L93 Difference]: Finished difference Result 2632 states and 4261 transitions. [2021-11-13 02:33:28,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:28,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-11-13 02:33:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:28,603 INFO L225 Difference]: With dead ends: 2632 [2021-11-13 02:33:28,603 INFO L226 Difference]: Without dead ends: 1604 [2021-11-13 02:33:28,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:28,615 INFO L933 BasicCegarLoop]: 1872 mSDtfsCounter, 957 mSDsluCounter, 1924 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 445.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 3712 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.29ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 615.10ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:28,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 3712 Invalid, 366 Unknown, 0 Unchecked, 11.29ms Time], IncrementalHoareTripleChecker [28 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 615.10ms Time] [2021-11-13 02:33:28,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-11-13 02:33:28,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1600. [2021-11-13 02:33:28,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1598 states have (on average 1.6038798498122653) internal successors, (2563), 1599 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:28,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2563 transitions. [2021-11-13 02:33:28,709 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2563 transitions. Word has length 111 [2021-11-13 02:33:28,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:28,712 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 2563 transitions. [2021-11-13 02:33:28,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2563 transitions. [2021-11-13 02:33:28,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-13 02:33:28,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:28,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:28,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 02:33:28,731 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:28,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1701906779, now seen corresponding path program 1 times [2021-11-13 02:33:28,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:28,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864678260] [2021-11-13 02:33:28,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:28,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:28,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:28,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864678260] [2021-11-13 02:33:28,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864678260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:28,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:28,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:28,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969832212] [2021-11-13 02:33:28,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:28,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:28,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:28,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:28,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:28,934 INFO L87 Difference]: Start difference. First operand 1600 states and 2563 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:29,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:29,521 INFO L93 Difference]: Finished difference Result 4122 states and 6616 transitions. [2021-11-13 02:33:29,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:29,521 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-11-13 02:33:29,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:29,542 INFO L225 Difference]: With dead ends: 4122 [2021-11-13 02:33:29,543 INFO L226 Difference]: Without dead ends: 2681 [2021-11-13 02:33:29,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:29,558 INFO L933 BasicCegarLoop]: 1125 mSDtfsCounter, 875 mSDsluCounter, 1904 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 328.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 2927 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.59ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 396.68ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:29,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 2927 Invalid, 215 Unknown, 0 Unchecked, 11.59ms Time], IncrementalHoareTripleChecker [18 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 396.68ms Time] [2021-11-13 02:33:29,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2021-11-13 02:33:29,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2677. [2021-11-13 02:33:29,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 2675 states have (on average 1.6022429906542055) internal successors, (4286), 2676 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:29,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 4286 transitions. [2021-11-13 02:33:29,716 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 4286 transitions. Word has length 114 [2021-11-13 02:33:29,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:29,716 INFO L470 AbstractCegarLoop]: Abstraction has 2677 states and 4286 transitions. [2021-11-13 02:33:29,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:29,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 4286 transitions. [2021-11-13 02:33:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 02:33:29,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:29,724 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:29,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 02:33:29,725 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:29,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:29,726 INFO L85 PathProgramCache]: Analyzing trace with hash -26102925, now seen corresponding path program 1 times [2021-11-13 02:33:29,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:29,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007875760] [2021-11-13 02:33:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:29,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:29,977 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:29,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007875760] [2021-11-13 02:33:29,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007875760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:29,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:29,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:29,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375962354] [2021-11-13 02:33:29,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:29,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:29,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:29,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:29,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:29,983 INFO L87 Difference]: Start difference. First operand 2677 states and 4286 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:30,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:30,653 INFO L93 Difference]: Finished difference Result 6390 states and 10242 transitions. [2021-11-13 02:33:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:30,656 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 120 [2021-11-13 02:33:30,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:30,693 INFO L225 Difference]: With dead ends: 6390 [2021-11-13 02:33:30,694 INFO L226 Difference]: Without dead ends: 3871 [2021-11-13 02:33:30,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:30,701 INFO L933 BasicCegarLoop]: 1893 mSDtfsCounter, 984 mSDsluCounter, 1950 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 329.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 3749 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.54ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 413.80ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:30,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [984 Valid, 3749 Invalid, 248 Unknown, 0 Unchecked, 12.54ms Time], IncrementalHoareTripleChecker [7 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 413.80ms Time] [2021-11-13 02:33:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-11-13 02:33:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3867. [2021-11-13 02:33:30,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3865 states have (on average 1.6002587322121604) internal successors, (6185), 3866 states have internal predecessors, (6185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:30,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 6185 transitions. [2021-11-13 02:33:30,933 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 6185 transitions. Word has length 120 [2021-11-13 02:33:30,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:30,934 INFO L470 AbstractCegarLoop]: Abstraction has 3867 states and 6185 transitions. [2021-11-13 02:33:30,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:30,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 6185 transitions. [2021-11-13 02:33:30,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-13 02:33:30,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:30,943 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:30,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 02:33:30,943 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:30,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:30,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1031686766, now seen corresponding path program 1 times [2021-11-13 02:33:30,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:30,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017918838] [2021-11-13 02:33:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:30,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:31,281 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:31,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017918838] [2021-11-13 02:33:31,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017918838] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:31,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:31,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:31,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790948274] [2021-11-13 02:33:31,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:31,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:31,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:31,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:31,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:31,286 INFO L87 Difference]: Start difference. First operand 3867 states and 6185 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:32,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:32,016 INFO L93 Difference]: Finished difference Result 10323 states and 16533 transitions. [2021-11-13 02:33:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:32,017 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 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 123 [2021-11-13 02:33:32,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:32,070 INFO L225 Difference]: With dead ends: 10323 [2021-11-13 02:33:32,070 INFO L226 Difference]: Without dead ends: 6633 [2021-11-13 02:33:32,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:32,084 INFO L933 BasicCegarLoop]: 1123 mSDtfsCounter, 1733 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 251.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.09ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 311.09ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:32,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1733 Valid, 1989 Invalid, 166 Unknown, 0 Unchecked, 11.09ms Time], IncrementalHoareTripleChecker [30 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 311.09ms Time] [2021-11-13 02:33:32,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6633 states. [2021-11-13 02:33:32,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6633 to 6629. [2021-11-13 02:33:32,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6629 states, 6627 states have (on average 1.5961973743775464) internal successors, (10578), 6628 states have internal predecessors, (10578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:32,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 10578 transitions. [2021-11-13 02:33:32,660 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 10578 transitions. Word has length 123 [2021-11-13 02:33:32,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:32,660 INFO L470 AbstractCegarLoop]: Abstraction has 6629 states and 10578 transitions. [2021-11-13 02:33:32,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:32,661 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 10578 transitions. [2021-11-13 02:33:32,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-13 02:33:32,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:32,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:32,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 02:33:32,682 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:32,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:32,683 INFO L85 PathProgramCache]: Analyzing trace with hash -388778377, now seen corresponding path program 1 times [2021-11-13 02:33:32,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:32,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407792178] [2021-11-13 02:33:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:32,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:32,872 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:32,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407792178] [2021-11-13 02:33:32,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407792178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:32,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:32,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:32,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617066401] [2021-11-13 02:33:32,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:32,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:32,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:32,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:32,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:32,875 INFO L87 Difference]: Start difference. First operand 6629 states and 10578 transitions. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:33,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:33,623 INFO L93 Difference]: Finished difference Result 16290 states and 26024 transitions. [2021-11-13 02:33:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:33,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-11-13 02:33:33,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:33,697 INFO L225 Difference]: With dead ends: 16290 [2021-11-13 02:33:33,697 INFO L226 Difference]: Without dead ends: 9837 [2021-11-13 02:33:33,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:33,714 INFO L933 BasicCegarLoop]: 1863 mSDtfsCounter, 1948 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 269.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1948 SdHoareTripleChecker+Valid, 2758 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.22ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 325.54ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:33,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1948 Valid, 2758 Invalid, 177 Unknown, 0 Unchecked, 12.22ms Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 325.54ms Time] [2021-11-13 02:33:33,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9837 states. [2021-11-13 02:33:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9837 to 9833. [2021-11-13 02:33:34,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9833 states, 9831 states have (on average 1.5939375445020851) internal successors, (15670), 9832 states have internal predecessors, (15670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:34,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9833 states to 9833 states and 15670 transitions. [2021-11-13 02:33:34,308 INFO L78 Accepts]: Start accepts. Automaton has 9833 states and 15670 transitions. Word has length 129 [2021-11-13 02:33:34,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:34,309 INFO L470 AbstractCegarLoop]: Abstraction has 9833 states and 15670 transitions. [2021-11-13 02:33:34,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:34,310 INFO L276 IsEmpty]: Start isEmpty. Operand 9833 states and 15670 transitions. [2021-11-13 02:33:34,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 02:33:34,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:34,327 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:34,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 02:33:34,327 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:34,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:34,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1809417986, now seen corresponding path program 1 times [2021-11-13 02:33:34,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:34,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912261867] [2021-11-13 02:33:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:34,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:34,508 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:34,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912261867] [2021-11-13 02:33:34,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912261867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:34,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:34,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:34,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671824553] [2021-11-13 02:33:34,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:34,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:34,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:34,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:34,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:34,511 INFO L87 Difference]: Start difference. First operand 9833 states and 15670 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:35,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:35,709 INFO L93 Difference]: Finished difference Result 26529 states and 42305 transitions. [2021-11-13 02:33:35,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:35,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 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 132 [2021-11-13 02:33:35,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:35,770 INFO L225 Difference]: With dead ends: 26529 [2021-11-13 02:33:35,770 INFO L226 Difference]: Without dead ends: 16891 [2021-11-13 02:33:35,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:35,796 INFO L933 BasicCegarLoop]: 1121 mSDtfsCounter, 1723 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 253.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 1958 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.84ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 307.38ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:35,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1723 Valid, 1958 Invalid, 164 Unknown, 0 Unchecked, 16.84ms Time], IncrementalHoareTripleChecker [30 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 307.38ms Time] [2021-11-13 02:33:35,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16891 states. [2021-11-13 02:33:36,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16891 to 16887. [2021-11-13 02:33:36,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16887 states, 16885 states have (on average 1.58732602901984) internal successors, (26802), 16886 states have internal predecessors, (26802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:36,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16887 states to 16887 states and 26802 transitions. [2021-11-13 02:33:36,842 INFO L78 Accepts]: Start accepts. Automaton has 16887 states and 26802 transitions. Word has length 132 [2021-11-13 02:33:36,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:36,843 INFO L470 AbstractCegarLoop]: Abstraction has 16887 states and 26802 transitions. [2021-11-13 02:33:36,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:36,844 INFO L276 IsEmpty]: Start isEmpty. Operand 16887 states and 26802 transitions. [2021-11-13 02:33:36,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-13 02:33:36,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:36,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:36,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 02:33:36,889 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:36,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:36,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1711558555, now seen corresponding path program 1 times [2021-11-13 02:33:36,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:36,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805526061] [2021-11-13 02:33:36,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:36,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:37,060 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:37,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805526061] [2021-11-13 02:33:37,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805526061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:37,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:37,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:37,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834714904] [2021-11-13 02:33:37,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:37,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:37,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:37,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:37,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:37,063 INFO L87 Difference]: Start difference. First operand 16887 states and 26802 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:38,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:38,757 INFO L93 Difference]: Finished difference Result 42098 states and 66902 transitions. [2021-11-13 02:33:38,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:38,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 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 138 [2021-11-13 02:33:38,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:38,835 INFO L225 Difference]: With dead ends: 42098 [2021-11-13 02:33:38,836 INFO L226 Difference]: Without dead ends: 25405 [2021-11-13 02:33:38,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:38,874 INFO L933 BasicCegarLoop]: 1833 mSDtfsCounter, 978 mSDsluCounter, 1834 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 320.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.00ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 383.61ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:38,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [978 Valid, 3577 Invalid, 240 Unknown, 0 Unchecked, 15.00ms Time], IncrementalHoareTripleChecker [7 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 383.61ms Time] [2021-11-13 02:33:38,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25405 states. [2021-11-13 02:33:40,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25405 to 25401. [2021-11-13 02:33:40,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25401 states, 25399 states have (on average 1.5849836607740462) internal successors, (40257), 25400 states have internal predecessors, (40257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:40,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25401 states to 25401 states and 40257 transitions. [2021-11-13 02:33:40,227 INFO L78 Accepts]: Start accepts. Automaton has 25401 states and 40257 transitions. Word has length 138 [2021-11-13 02:33:40,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:40,228 INFO L470 AbstractCegarLoop]: Abstraction has 25401 states and 40257 transitions. [2021-11-13 02:33:40,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:40,228 INFO L276 IsEmpty]: Start isEmpty. Operand 25401 states and 40257 transitions. [2021-11-13 02:33:40,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-13 02:33:40,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:40,420 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:40,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 02:33:40,421 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:40,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1867205292, now seen corresponding path program 1 times [2021-11-13 02:33:40,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:40,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286939683] [2021-11-13 02:33:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:40,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:40,631 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:40,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286939683] [2021-11-13 02:33:40,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286939683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:40,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:40,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:40,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257253929] [2021-11-13 02:33:40,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:40,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:40,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:40,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:40,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:40,634 INFO L87 Difference]: Start difference. First operand 25401 states and 40257 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:43,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:43,034 INFO L93 Difference]: Finished difference Result 64246 states and 101503 transitions. [2021-11-13 02:33:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:43,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 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 141 [2021-11-13 02:33:43,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:43,160 INFO L225 Difference]: With dead ends: 64246 [2021-11-13 02:33:43,160 INFO L226 Difference]: Without dead ends: 39052 [2021-11-13 02:33:43,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:43,202 INFO L933 BasicCegarLoop]: 1829 mSDtfsCounter, 945 mSDsluCounter, 1818 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 616.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 945 SdHoareTripleChecker+Valid, 3587 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.71ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 828.07ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:43,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [945 Valid, 3587 Invalid, 512 Unknown, 0 Unchecked, 18.71ms Time], IncrementalHoareTripleChecker [19 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 828.07ms Time] [2021-11-13 02:33:43,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-13 02:33:45,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-13 02:33:45,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.5675357270911232) internal successors, (61206), 39047 states have internal predecessors, (61206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 61206 transitions. [2021-11-13 02:33:45,322 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 61206 transitions. Word has length 141 [2021-11-13 02:33:45,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:45,323 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 61206 transitions. [2021-11-13 02:33:45,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:45,323 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 61206 transitions. [2021-11-13 02:33:45,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 02:33:45,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:45,368 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:45,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 02:33:45,369 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:45,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:45,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1176593850, now seen corresponding path program 1 times [2021-11-13 02:33:45,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:45,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703617025] [2021-11-13 02:33:45,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:45,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:45,560 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:45,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703617025] [2021-11-13 02:33:45,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703617025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:45,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:45,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:45,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325528561] [2021-11-13 02:33:45,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:45,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:45,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:45,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:45,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:45,563 INFO L87 Difference]: Start difference. First operand 39048 states and 61206 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:47,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:47,590 INFO L93 Difference]: Finished difference Result 77893 states and 122093 transitions. [2021-11-13 02:33:47,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:47,591 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 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 142 [2021-11-13 02:33:47,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:47,693 INFO L225 Difference]: With dead ends: 77893 [2021-11-13 02:33:47,693 INFO L226 Difference]: Without dead ends: 39052 [2021-11-13 02:33:47,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:47,737 INFO L933 BasicCegarLoop]: 1835 mSDtfsCounter, 1853 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 489.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1853 SdHoareTripleChecker+Valid, 2733 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.51ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 562.97ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:47,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1853 Valid, 2733 Invalid, 271 Unknown, 0 Unchecked, 8.51ms Time], IncrementalHoareTripleChecker [7 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 562.97ms Time] [2021-11-13 02:33:47,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-13 02:33:49,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-13 02:33:49,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.562951390667418) internal successors, (61027), 39047 states have internal predecessors, (61027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:49,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 61027 transitions. [2021-11-13 02:33:49,727 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 61027 transitions. Word has length 142 [2021-11-13 02:33:49,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:49,728 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 61027 transitions. [2021-11-13 02:33:49,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:49,729 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 61027 transitions. [2021-11-13 02:33:49,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-13 02:33:49,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:49,770 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:49,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 02:33:49,770 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:49,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:49,771 INFO L85 PathProgramCache]: Analyzing trace with hash 761269293, now seen corresponding path program 1 times [2021-11-13 02:33:49,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:49,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249298536] [2021-11-13 02:33:49,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:49,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:49,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:49,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249298536] [2021-11-13 02:33:49,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249298536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:49,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:49,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:49,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252206816] [2021-11-13 02:33:49,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:49,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:49,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:49,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:49,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:49,905 INFO L87 Difference]: Start difference. First operand 39048 states and 61027 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:51,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:51,527 INFO L93 Difference]: Finished difference Result 77893 states and 121736 transitions. [2021-11-13 02:33:51,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:51,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2021-11-13 02:33:51,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:51,608 INFO L225 Difference]: With dead ends: 77893 [2021-11-13 02:33:51,608 INFO L226 Difference]: Without dead ends: 39052 [2021-11-13 02:33:51,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:51,641 INFO L933 BasicCegarLoop]: 1825 mSDtfsCounter, 1910 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 290.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1910 SdHoareTripleChecker+Valid, 2696 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.29ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 362.92ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:51,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1910 Valid, 2696 Invalid, 281 Unknown, 0 Unchecked, 7.29ms Time], IncrementalHoareTripleChecker [7 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 362.92ms Time] [2021-11-13 02:33:51,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-13 02:33:53,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-13 02:33:53,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.5583670542437125) internal successors, (60848), 39047 states have internal predecessors, (60848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 60848 transitions. [2021-11-13 02:33:53,342 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 60848 transitions. Word has length 143 [2021-11-13 02:33:53,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:53,342 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 60848 transitions. [2021-11-13 02:33:53,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 60848 transitions. [2021-11-13 02:33:53,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 02:33:53,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:53,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:53,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 02:33:53,364 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:53,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1585737793, now seen corresponding path program 1 times [2021-11-13 02:33:53,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:53,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600006199] [2021-11-13 02:33:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:53,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:53,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:53,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:53,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600006199] [2021-11-13 02:33:53,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600006199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:53,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:53,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:53,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117378286] [2021-11-13 02:33:53,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:53,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:53,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:53,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:53,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:53,492 INFO L87 Difference]: Start difference. First operand 39048 states and 60848 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:55,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:55,267 INFO L93 Difference]: Finished difference Result 77893 states and 121379 transitions. [2021-11-13 02:33:55,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:55,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 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 144 [2021-11-13 02:33:55,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:55,321 INFO L225 Difference]: With dead ends: 77893 [2021-11-13 02:33:55,321 INFO L226 Difference]: Without dead ends: 39052 [2021-11-13 02:33:55,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:55,357 INFO L933 BasicCegarLoop]: 1797 mSDtfsCounter, 1907 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 316.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1907 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.02ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 394.07ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:55,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1907 Valid, 2641 Invalid, 279 Unknown, 0 Unchecked, 7.02ms Time], IncrementalHoareTripleChecker [7 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 394.07ms Time] [2021-11-13 02:33:55,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-13 02:33:56,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-13 02:33:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.5537827178200072) internal successors, (60669), 39047 states have internal predecessors, (60669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:57,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 60669 transitions. [2021-11-13 02:33:57,001 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 60669 transitions. Word has length 144 [2021-11-13 02:33:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:57,002 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 60669 transitions. [2021-11-13 02:33:57,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:57,002 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 60669 transitions. [2021-11-13 02:33:57,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-13 02:33:57,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:57,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:33:57,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 02:33:57,021 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:33:57,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:57,022 INFO L85 PathProgramCache]: Analyzing trace with hash 675231494, now seen corresponding path program 1 times [2021-11-13 02:33:57,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:57,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687215879] [2021-11-13 02:33:57,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:57,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:33:57,134 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:57,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687215879] [2021-11-13 02:33:57,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687215879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:33:57,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:33:57,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:33:57,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458908701] [2021-11-13 02:33:57,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:33:57,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:33:57,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:57,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:33:57,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:57,136 INFO L87 Difference]: Start difference. First operand 39048 states and 60669 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:33:58,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:58,908 INFO L93 Difference]: Finished difference Result 77893 states and 121022 transitions. [2021-11-13 02:33:58,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:33:58,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 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 145 [2021-11-13 02:33:58,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:58,960 INFO L225 Difference]: With dead ends: 77893 [2021-11-13 02:33:58,960 INFO L226 Difference]: Without dead ends: 39052 [2021-11-13 02:33:58,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:33:58,987 INFO L933 BasicCegarLoop]: 1769 mSDtfsCounter, 967 mSDsluCounter, 1722 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 502.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 967 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.60ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 568.32ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:58,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [967 Valid, 3413 Invalid, 393 Unknown, 0 Unchecked, 5.60ms Time], IncrementalHoareTripleChecker [7 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 568.32ms Time] [2021-11-13 02:33:59,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-13 02:34:00,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-13 02:34:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.5491983813963017) internal successors, (60490), 39047 states have internal predecessors, (60490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:00,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 60490 transitions. [2021-11-13 02:34:00,689 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 60490 transitions. Word has length 145 [2021-11-13 02:34:00,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:00,689 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 60490 transitions. [2021-11-13 02:34:00,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:00,690 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 60490 transitions. [2021-11-13 02:34:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-13 02:34:00,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:00,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:00,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 02:34:00,715 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:00,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:00,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1750127981, now seen corresponding path program 1 times [2021-11-13 02:34:00,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:00,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028029994] [2021-11-13 02:34:00,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:00,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:00,857 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:00,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028029994] [2021-11-13 02:34:00,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028029994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:00,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:00,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:34:00,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167532414] [2021-11-13 02:34:00,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:00,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:34:00,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:00,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:34:00,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:34:00,859 INFO L87 Difference]: Start difference. First operand 39048 states and 60490 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:02,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:02,895 INFO L93 Difference]: Finished difference Result 77893 states and 120665 transitions. [2021-11-13 02:34:02,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:34:02,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 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 147 [2021-11-13 02:34:02,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:02,954 INFO L225 Difference]: With dead ends: 77893 [2021-11-13 02:34:02,954 INFO L226 Difference]: Without dead ends: 39052 [2021-11-13 02:34:02,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:34:02,978 INFO L933 BasicCegarLoop]: 1829 mSDtfsCounter, 930 mSDsluCounter, 1818 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 383.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 3587 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.74ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 496.68ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:02,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [930 Valid, 3587 Invalid, 491 Unknown, 0 Unchecked, 6.74ms Time], IncrementalHoareTripleChecker [13 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 496.68ms Time] [2021-11-13 02:34:03,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39052 states. [2021-11-13 02:34:04,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39052 to 39048. [2021-11-13 02:34:04,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39048 states, 39046 states have (on average 1.5470982943195206) internal successors, (60408), 39047 states have internal predecessors, (60408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:04,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39048 states to 39048 states and 60408 transitions. [2021-11-13 02:34:04,862 INFO L78 Accepts]: Start accepts. Automaton has 39048 states and 60408 transitions. Word has length 147 [2021-11-13 02:34:04,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:04,862 INFO L470 AbstractCegarLoop]: Abstraction has 39048 states and 60408 transitions. [2021-11-13 02:34:04,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:04,863 INFO L276 IsEmpty]: Start isEmpty. Operand 39048 states and 60408 transitions. [2021-11-13 02:34:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-13 02:34:04,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:04,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:04,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 02:34:04,885 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:04,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:04,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1604354251, now seen corresponding path program 1 times [2021-11-13 02:34:04,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:04,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146346796] [2021-11-13 02:34:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:04,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:05,020 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:05,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146346796] [2021-11-13 02:34:05,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146346796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:05,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:05,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:34:05,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917472711] [2021-11-13 02:34:05,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:05,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:34:05,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:05,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:34:05,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:34:05,023 INFO L87 Difference]: Start difference. First operand 39048 states and 60408 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:07,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:07,527 INFO L93 Difference]: Finished difference Result 97725 states and 150341 transitions. [2021-11-13 02:34:07,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:34:07,528 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 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 150 [2021-11-13 02:34:07,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:07,628 INFO L225 Difference]: With dead ends: 97725 [2021-11-13 02:34:07,628 INFO L226 Difference]: Without dead ends: 58884 [2021-11-13 02:34:07,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:34:07,665 INFO L933 BasicCegarLoop]: 1847 mSDtfsCounter, 1835 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 311.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1835 SdHoareTripleChecker+Valid, 2745 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.90ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 375.09ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:07,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1835 Valid, 2745 Invalid, 304 Unknown, 0 Unchecked, 6.90ms Time], IncrementalHoareTripleChecker [19 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 375.09ms Time] [2021-11-13 02:34:07,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58884 states. [2021-11-13 02:34:10,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58884 to 58880. [2021-11-13 02:34:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58880 states, 58878 states have (on average 1.530707564795) internal successors, (90125), 58879 states have internal predecessors, (90125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:10,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58880 states to 58880 states and 90125 transitions. [2021-11-13 02:34:10,469 INFO L78 Accepts]: Start accepts. Automaton has 58880 states and 90125 transitions. Word has length 150 [2021-11-13 02:34:10,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:10,469 INFO L470 AbstractCegarLoop]: Abstraction has 58880 states and 90125 transitions. [2021-11-13 02:34:10,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:10,469 INFO L276 IsEmpty]: Start isEmpty. Operand 58880 states and 90125 transitions. [2021-11-13 02:34:10,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-13 02:34:10,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:10,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:34:10,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 02:34:10,496 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:34:10,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:10,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1551160667, now seen corresponding path program 1 times [2021-11-13 02:34:10,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:10,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945961536] [2021-11-13 02:34:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:10,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:34:11,134 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:11,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945961536] [2021-11-13 02:34:11,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945961536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:34:11,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:34:11,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 02:34:11,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287650480] [2021-11-13 02:34:11,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:34:11,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:34:11,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:11,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:34:11,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:34:11,136 INFO L87 Difference]: Start difference. First operand 58880 states and 90125 transitions. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:34:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:14,739 INFO L93 Difference]: Finished difference Result 113993 states and 174877 transitions. [2021-11-13 02:34:14,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:34:14,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 0 states have call successors, (0), 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 151 [2021-11-13 02:34:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:14,878 INFO L225 Difference]: With dead ends: 113993 [2021-11-13 02:34:14,878 INFO L226 Difference]: Without dead ends: 82174 [2021-11-13 02:34:14,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:34:14,912 INFO L933 BasicCegarLoop]: 2364 mSDtfsCounter, 2849 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 282.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2849 SdHoareTripleChecker+Valid, 4434 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.05ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 357.79ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:14,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2849 Valid, 4434 Invalid, 280 Unknown, 0 Unchecked, 10.05ms Time], IncrementalHoareTripleChecker [11 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 357.79ms Time] [2021-11-13 02:34:14,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82174 states.