./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a455a9a3-2f9c-4df4-87fd-dab519c00a91/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a455a9a3-2f9c-4df4-87fd-dab519c00a91/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a455a9a3-2f9c-4df4-87fd-dab519c00a91/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a455a9a3-2f9c-4df4-87fd-dab519c00a91/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a455a9a3-2f9c-4df4-87fd-dab519c00a91/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a455a9a3-2f9c-4df4-87fd-dab519c00a91/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 82b978acf3e870955535549d16879da8eac705f6c266c172b47775a3acd47fc6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:58:40,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:58:40,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:58:40,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:58:40,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:58:40,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:58:40,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:58:40,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:58:40,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:58:40,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:58:40,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:58:40,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:58:40,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:58:40,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:58:40,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:58:40,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:58:40,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:58:40,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:58:40,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:58:40,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:58:40,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:58:40,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:58:40,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:58:40,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:58:40,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:58:40,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:58:40,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:58:40,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:58:40,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:58:40,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:58:40,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:58:40,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:58:40,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:58:40,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:58:40,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:58:40,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:58:40,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:58:40,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:58:40,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:58:40,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:58:40,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:58:40,416 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a455a9a3-2f9c-4df4-87fd-dab519c00a91/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:58:40,461 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:58:40,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:58:40,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:58:40,463 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:58:40,464 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:58:40,464 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:58:40,464 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:58:40,464 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:58:40,465 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:58:40,465 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:58:40,466 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:58:40,466 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:58:40,467 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:58:40,467 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:58:40,467 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:58:40,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:58:40,468 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:58:40,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:58:40,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:58:40,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:58:40,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:58:40,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:58:40,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:58:40,470 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:58:40,470 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:58:40,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:58:40,471 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:58:40,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:58:40,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:58:40,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:58:40,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:58:40,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:58:40,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:58:40,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:58:40,475 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:58:40,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:58:40,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:58:40,475 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:58:40,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:58:40,476 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_a455a9a3-2f9c-4df4-87fd-dab519c00a91/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a455a9a3-2f9c-4df4-87fd-dab519c00a91/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 82b978acf3e870955535549d16879da8eac705f6c266c172b47775a3acd47fc6 [2021-11-07 01:58:40,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:58:40,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:58:40,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:58:40,784 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:58:40,785 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:58:40,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a455a9a3-2f9c-4df4-87fd-dab519c00a91/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2021-11-07 01:58:40,852 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a455a9a3-2f9c-4df4-87fd-dab519c00a91/bin/utaipan-UUZaoUuFF8/data/c6eb220ed/ce9ac7e865864081b9b2d1c6aadce3ae/FLAG45bd86961 [2021-11-07 01:58:41,756 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:58:41,759 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a455a9a3-2f9c-4df4-87fd-dab519c00a91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2021-11-07 01:58:41,813 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a455a9a3-2f9c-4df4-87fd-dab519c00a91/bin/utaipan-UUZaoUuFF8/data/c6eb220ed/ce9ac7e865864081b9b2d1c6aadce3ae/FLAG45bd86961 [2021-11-07 01:58:42,172 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a455a9a3-2f9c-4df4-87fd-dab519c00a91/bin/utaipan-UUZaoUuFF8/data/c6eb220ed/ce9ac7e865864081b9b2d1c6aadce3ae [2021-11-07 01:58:42,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:58:42,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:58:42,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:42,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:58:42,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:58:42,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:42" (1/1) ... [2021-11-07 01:58:42,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c230d30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:42, skipping insertion in model container [2021-11-07 01:58:42,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:58:42" (1/1) ... [2021-11-07 01:58:42,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:58:42,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:58:43,701 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_a455a9a3-2f9c-4df4-87fd-dab519c00a91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[40132,40145] [2021-11-07 01:58:47,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:47,245 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:58:47,671 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_a455a9a3-2f9c-4df4-87fd-dab519c00a91/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[40132,40145] [2021-11-07 01:58:50,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:58:50,856 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:58:50,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:50 WrapperNode [2021-11-07 01:58:50,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:58:50,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:58:50,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:58:50,858 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:58:50,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:50" (1/1) ... [2021-11-07 01:58:50,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:50" (1/1) ... [2021-11-07 01:58:51,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:58:51,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:58:51,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:58:51,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:58:51,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:50" (1/1) ... [2021-11-07 01:58:51,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:50" (1/1) ... [2021-11-07 01:58:51,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:50" (1/1) ... [2021-11-07 01:58:51,366 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:50" (1/1) ... [2021-11-07 01:58:51,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:50" (1/1) ... [2021-11-07 01:58:51,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:50" (1/1) ... [2021-11-07 01:58:51,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:50" (1/1) ... [2021-11-07 01:58:51,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:58:51,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:58:51,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:58:51,953 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:58:51,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:50" (1/1) ... [2021-11-07 01:58:51,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:58:51,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a455a9a3-2f9c-4df4-87fd-dab519c00a91/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:58:52,018 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a455a9a3-2f9c-4df4-87fd-dab519c00a91/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:58:52,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a455a9a3-2f9c-4df4-87fd-dab519c00a91/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:58:52,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 01:58:52,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:58:52,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:58:52,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:59:28,729 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:59:28,729 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 01:59:28,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:59:28 BoogieIcfgContainer [2021-11-07 01:59:28,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:59:28,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:59:28,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:59:28,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:59:28,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:58:42" (1/3) ... [2021-11-07 01:59:28,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604a08cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:59:28, skipping insertion in model container [2021-11-07 01:59:28,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:58:50" (2/3) ... [2021-11-07 01:59:28,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@604a08cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:59:28, skipping insertion in model container [2021-11-07 01:59:28,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:59:28" (3/3) ... [2021-11-07 01:59:28,752 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2021-11-07 01:59:28,758 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:59:28,758 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:59:28,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:59:28,832 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:59:28,833 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:59:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand has 5197 states, 5195 states have (on average 1.7027911453320501) internal successors, (8846), 5196 states have internal predecessors, (8846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:29,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-07 01:59:29,206 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:29,207 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:29,208 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:29,217 INFO L85 PathProgramCache]: Analyzing trace with hash -2055199063, now seen corresponding path program 1 times [2021-11-07 01:59:29,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:59:29,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399392999] [2021-11-07 01:59:29,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:29,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:59:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:30,065 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:59:30,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399392999] [2021-11-07 01:59:30,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399392999] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:30,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:30,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:59:30,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700915507] [2021-11-07 01:59:30,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:59:30,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:59:30,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:59:30,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:30,107 INFO L87 Difference]: Start difference. First operand has 5197 states, 5195 states have (on average 1.7027911453320501) internal successors, (8846), 5196 states have internal predecessors, (8846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:30,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:30,560 INFO L93 Difference]: Finished difference Result 10178 states and 17151 transitions. [2021-11-07 01:59:30,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:30,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 270 [2021-11-07 01:59:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:30,629 INFO L225 Difference]: With dead ends: 10178 [2021-11-07 01:59:30,629 INFO L226 Difference]: Without dead ends: 6100 [2021-11-07 01:59:30,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:30,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6100 states. [2021-11-07 01:59:30,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6100 to 6098. [2021-11-07 01:59:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6098 states, 6097 states have (on average 1.6058717402000984) internal successors, (9791), 6097 states have internal predecessors, (9791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6098 states to 6098 states and 9791 transitions. [2021-11-07 01:59:30,974 INFO L78 Accepts]: Start accepts. Automaton has 6098 states and 9791 transitions. Word has length 270 [2021-11-07 01:59:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:30,982 INFO L470 AbstractCegarLoop]: Abstraction has 6098 states and 9791 transitions. [2021-11-07 01:59:30,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 6098 states and 9791 transitions. [2021-11-07 01:59:31,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-11-07 01:59:31,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:31,001 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:31,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:59:31,002 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:31,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:31,006 INFO L85 PathProgramCache]: Analyzing trace with hash 619259272, now seen corresponding path program 1 times [2021-11-07 01:59:31,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:59:31,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134532393] [2021-11-07 01:59:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:31,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:59:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:31,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:31,353 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:59:31,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134532393] [2021-11-07 01:59:31,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134532393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:31,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:31,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:59:31,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612535643] [2021-11-07 01:59:31,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:59:31,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:59:31,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:59:31,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:31,358 INFO L87 Difference]: Start difference. First operand 6098 states and 9791 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:31,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:31,771 INFO L93 Difference]: Finished difference Result 13278 states and 21442 transitions. [2021-11-07 01:59:31,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:31,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 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 280 [2021-11-07 01:59:31,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:31,827 INFO L225 Difference]: With dead ends: 13278 [2021-11-07 01:59:31,827 INFO L226 Difference]: Without dead ends: 8002 [2021-11-07 01:59:31,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:31,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2021-11-07 01:59:32,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 8000. [2021-11-07 01:59:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8000 states, 7999 states have (on average 1.6145768221027628) internal successors, (12915), 7999 states have internal predecessors, (12915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8000 states to 8000 states and 12915 transitions. [2021-11-07 01:59:32,256 INFO L78 Accepts]: Start accepts. Automaton has 8000 states and 12915 transitions. Word has length 280 [2021-11-07 01:59:32,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:32,257 INFO L470 AbstractCegarLoop]: Abstraction has 8000 states and 12915 transitions. [2021-11-07 01:59:32,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:32,258 INFO L276 IsEmpty]: Start isEmpty. Operand 8000 states and 12915 transitions. [2021-11-07 01:59:32,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-11-07 01:59:32,278 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:32,278 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:32,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:59:32,279 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:32,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:32,280 INFO L85 PathProgramCache]: Analyzing trace with hash -2070702762, now seen corresponding path program 1 times [2021-11-07 01:59:32,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:59:32,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680930093] [2021-11-07 01:59:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:32,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:59:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:32,470 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:59:32,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680930093] [2021-11-07 01:59:32,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680930093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:32,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:32,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:59:32,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786936435] [2021-11-07 01:59:32,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:59:32,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:59:32,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:59:32,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:32,474 INFO L87 Difference]: Start difference. First operand 8000 states and 12915 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:33,119 INFO L93 Difference]: Finished difference Result 18380 states and 29684 transitions. [2021-11-07 01:59:33,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:33,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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 290 [2021-11-07 01:59:33,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:33,203 INFO L225 Difference]: With dead ends: 18380 [2021-11-07 01:59:33,203 INFO L226 Difference]: Without dead ends: 11065 [2021-11-07 01:59:33,218 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:33,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11065 states. [2021-11-07 01:59:33,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11065 to 11063. [2021-11-07 01:59:33,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11063 states, 11062 states have (on average 1.6116434641113722) internal successors, (17828), 11062 states have internal predecessors, (17828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:33,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11063 states to 11063 states and 17828 transitions. [2021-11-07 01:59:33,783 INFO L78 Accepts]: Start accepts. Automaton has 11063 states and 17828 transitions. Word has length 290 [2021-11-07 01:59:33,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:33,784 INFO L470 AbstractCegarLoop]: Abstraction has 11063 states and 17828 transitions. [2021-11-07 01:59:33,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:33,784 INFO L276 IsEmpty]: Start isEmpty. Operand 11063 states and 17828 transitions. [2021-11-07 01:59:33,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-07 01:59:33,806 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:33,807 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:33,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 01:59:33,807 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:33,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:33,809 INFO L85 PathProgramCache]: Analyzing trace with hash -2057391498, now seen corresponding path program 1 times [2021-11-07 01:59:33,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:59:33,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354924970] [2021-11-07 01:59:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:33,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:59:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:33,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:33,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:59:33,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354924970] [2021-11-07 01:59:34,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354924970] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:34,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:34,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:59:34,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944793686] [2021-11-07 01:59:34,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:59:34,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:59:34,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:59:34,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:34,006 INFO L87 Difference]: Start difference. First operand 11063 states and 17828 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:35,024 INFO L93 Difference]: Finished difference Result 26151 states and 42033 transitions. [2021-11-07 01:59:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:35,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 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 300 [2021-11-07 01:59:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:35,070 INFO L225 Difference]: With dead ends: 26151 [2021-11-07 01:59:35,070 INFO L226 Difference]: Without dead ends: 15718 [2021-11-07 01:59:35,092 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:35,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15718 states. [2021-11-07 01:59:36,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15718 to 15716. [2021-11-07 01:59:36,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15716 states, 15715 states have (on average 1.5994272987591474) internal successors, (25135), 15715 states have internal predecessors, (25135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:36,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15716 states to 15716 states and 25135 transitions. [2021-11-07 01:59:36,105 INFO L78 Accepts]: Start accepts. Automaton has 15716 states and 25135 transitions. Word has length 300 [2021-11-07 01:59:36,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:36,106 INFO L470 AbstractCegarLoop]: Abstraction has 15716 states and 25135 transitions. [2021-11-07 01:59:36,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:36,108 INFO L276 IsEmpty]: Start isEmpty. Operand 15716 states and 25135 transitions. [2021-11-07 01:59:36,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-11-07 01:59:36,140 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:36,140 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:36,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 01:59:36,141 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:36,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:36,141 INFO L85 PathProgramCache]: Analyzing trace with hash -682758036, now seen corresponding path program 1 times [2021-11-07 01:59:36,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:59:36,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315915245] [2021-11-07 01:59:36,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:36,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:59:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:36,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:59:36,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315915245] [2021-11-07 01:59:36,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315915245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:36,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:36,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:59:36,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672541181] [2021-11-07 01:59:36,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:59:36,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:59:36,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:59:36,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:36,340 INFO L87 Difference]: Start difference. First operand 15716 states and 25135 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:38,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:38,159 INFO L93 Difference]: Finished difference Result 37884 states and 60404 transitions. [2021-11-07 01:59:38,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:38,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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 310 [2021-11-07 01:59:38,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:38,220 INFO L225 Difference]: With dead ends: 37884 [2021-11-07 01:59:38,220 INFO L226 Difference]: Without dead ends: 22784 [2021-11-07 01:59:38,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:38,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22784 states. [2021-11-07 01:59:39,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22784 to 22782. [2021-11-07 01:59:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22782 states, 22781 states have (on average 1.5799130854659584) internal successors, (35992), 22781 states have internal predecessors, (35992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:39,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22782 states to 22782 states and 35992 transitions. [2021-11-07 01:59:39,336 INFO L78 Accepts]: Start accepts. Automaton has 22782 states and 35992 transitions. Word has length 310 [2021-11-07 01:59:39,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:39,337 INFO L470 AbstractCegarLoop]: Abstraction has 22782 states and 35992 transitions. [2021-11-07 01:59:39,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:39,337 INFO L276 IsEmpty]: Start isEmpty. Operand 22782 states and 35992 transitions. [2021-11-07 01:59:39,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-07 01:59:39,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:39,378 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:39,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 01:59:39,378 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:39,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:39,379 INFO L85 PathProgramCache]: Analyzing trace with hash 888697380, now seen corresponding path program 1 times [2021-11-07 01:59:39,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:59:39,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81472756] [2021-11-07 01:59:39,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:39,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:59:40,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:40,643 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:59:40,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81472756] [2021-11-07 01:59:40,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81472756] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:40,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:40,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:59:40,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44654910] [2021-11-07 01:59:40,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:59:40,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:59:40,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:59:40,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:59:40,652 INFO L87 Difference]: Start difference. First operand 22782 states and 35992 transitions. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:43,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:43,089 INFO L93 Difference]: Finished difference Result 68075 states and 107539 transitions. [2021-11-07 01:59:43,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:59:43,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 3 states have internal predecessors, (320), 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 320 [2021-11-07 01:59:43,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:43,217 INFO L225 Difference]: With dead ends: 68075 [2021-11-07 01:59:43,217 INFO L226 Difference]: Without dead ends: 45304 [2021-11-07 01:59:43,253 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:59:43,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45304 states. [2021-11-07 01:59:44,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45304 to 45302. [2021-11-07 01:59:45,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45302 states, 45301 states have (on average 1.5783978278625197) internal successors, (71503), 45301 states have internal predecessors, (71503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:45,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45302 states to 45302 states and 71503 transitions. [2021-11-07 01:59:45,122 INFO L78 Accepts]: Start accepts. Automaton has 45302 states and 71503 transitions. Word has length 320 [2021-11-07 01:59:45,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:45,122 INFO L470 AbstractCegarLoop]: Abstraction has 45302 states and 71503 transitions. [2021-11-07 01:59:45,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:45,123 INFO L276 IsEmpty]: Start isEmpty. Operand 45302 states and 71503 transitions. [2021-11-07 01:59:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-11-07 01:59:45,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:45,193 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:45,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 01:59:45,194 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:45,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:45,194 INFO L85 PathProgramCache]: Analyzing trace with hash 457388936, now seen corresponding path program 1 times [2021-11-07 01:59:45,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:59:45,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244376034] [2021-11-07 01:59:45,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:45,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:59:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:45,356 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:59:45,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244376034] [2021-11-07 01:59:45,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244376034] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:45,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:45,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:59:45,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992935677] [2021-11-07 01:59:45,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:59:45,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:59:45,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:59:45,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:45,359 INFO L87 Difference]: Start difference. First operand 45302 states and 71503 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:47,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:47,024 INFO L93 Difference]: Finished difference Result 103327 states and 163284 transitions. [2021-11-07 01:59:47,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:47,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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 322 [2021-11-07 01:59:47,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:47,157 INFO L225 Difference]: With dead ends: 103327 [2021-11-07 01:59:47,158 INFO L226 Difference]: Without dead ends: 58968 [2021-11-07 01:59:47,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:47,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58968 states. [2021-11-07 01:59:50,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58968 to 58966. [2021-11-07 01:59:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58966 states, 58965 states have (on average 1.5765454082930552) internal successors, (92961), 58965 states have internal predecessors, (92961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:50,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58966 states to 58966 states and 92961 transitions. [2021-11-07 01:59:50,540 INFO L78 Accepts]: Start accepts. Automaton has 58966 states and 92961 transitions. Word has length 322 [2021-11-07 01:59:50,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:59:50,541 INFO L470 AbstractCegarLoop]: Abstraction has 58966 states and 92961 transitions. [2021-11-07 01:59:50,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 58966 states and 92961 transitions. [2021-11-07 01:59:50,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-11-07 01:59:50,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:59:50,580 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:59:50,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 01:59:50,580 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:59:50,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:59:50,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1327782449, now seen corresponding path program 1 times [2021-11-07 01:59:50,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:59:50,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436551468] [2021-11-07 01:59:50,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:59:50,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:59:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:59:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:59:50,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:59:50,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436551468] [2021-11-07 01:59:50,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436551468] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:59:50,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:59:50,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 01:59:50,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043233222] [2021-11-07 01:59:50,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:59:50,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:59:50,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:59:50,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:50,780 INFO L87 Difference]: Start difference. First operand 58966 states and 92961 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:59:54,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:59:54,785 INFO L93 Difference]: Finished difference Result 175374 states and 276428 transitions. [2021-11-07 01:59:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:59:54,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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 322 [2021-11-07 01:59:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:59:55,031 INFO L225 Difference]: With dead ends: 175374 [2021-11-07 01:59:55,032 INFO L226 Difference]: Without dead ends: 116592 [2021-11-07 01:59:55,125 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:59:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116592 states.