./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh --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 a50787eee309f695181bc37c4f84940bb8fed2cb76457a2c563ef0feb29ebac8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 15:58:54,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:58:54,229 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:58:54,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:58:54,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:58:54,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:58:54,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:58:54,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:58:54,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:58:54,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:58:54,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:58:54,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:58:54,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:58:54,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:58:54,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:58:54,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:58:54,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:58:54,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:58:54,260 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:58:54,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:58:54,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:58:54,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:58:54,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:58:54,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:58:54,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:58:54,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:58:54,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:58:54,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:58:54,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:58:54,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:58:54,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:58:54,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:58:54,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:58:54,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:58:54,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:58:54,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:58:54,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:58:54,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:58:54,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:58:54,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:58:54,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:58:54,277 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:58:54,296 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:58:54,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:58:54,297 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:58:54,297 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:58:54,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:58:54,297 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:58:54,298 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:58:54,298 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:58:54,298 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:58:54,298 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:58:54,298 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:58:54,298 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:58:54,299 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:58:54,299 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:58:54,299 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:58:54,299 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:58:54,299 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:58:54,299 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:58:54,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:58:54,300 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:58:54,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:58:54,301 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:58:54,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:58:54,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:58:54,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:58:54,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:58:54,301 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:58:54,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:58:54,302 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:58:54,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:58:54,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:58:54,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:58:54,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:58:54,302 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:58:54,302 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:58:54,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:58:54,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:58:54,303 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:58:54,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:58:54,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:58:54,303 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:58:54,303 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50787eee309f695181bc37c4f84940bb8fed2cb76457a2c563ef0feb29ebac8 [2022-12-14 15:58:54,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:58:54,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:58:54,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:58:54,494 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:58:54,494 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:58:54,495 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label44+token_ring.08.cil-1.c [2022-12-14 15:58:57,074 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:58:57,527 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:58:57,528 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/sv-benchmarks/c/combinations/Problem05_label44+token_ring.08.cil-1.c [2022-12-14 15:58:57,559 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/data/844993917/cf24e40964084d9c8ad741f330ca803d/FLAG0d0b93ad7 [2022-12-14 15:58:57,570 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/data/844993917/cf24e40964084d9c8ad741f330ca803d [2022-12-14 15:58:57,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:58:57,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:58:57,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:58:57,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:58:57,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:58:57,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:58:57" (1/1) ... [2022-12-14 15:58:57,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5819fe39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:58:57, skipping insertion in model container [2022-12-14 15:58:57,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:58:57" (1/1) ... [2022-12-14 15:58:57,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:58:57,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:58:59,102 WARN L237 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_1b7e069f-3ca3-4412-aadd-025555e160f7/sv-benchmarks/c/combinations/Problem05_label44+token_ring.08.cil-1.c[377340,377353] [2022-12-14 15:58:59,125 WARN L237 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_1b7e069f-3ca3-4412-aadd-025555e160f7/sv-benchmarks/c/combinations/Problem05_label44+token_ring.08.cil-1.c[383339,383352] [2022-12-14 15:58:59,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:58:59,332 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:59:00,136 WARN L237 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_1b7e069f-3ca3-4412-aadd-025555e160f7/sv-benchmarks/c/combinations/Problem05_label44+token_ring.08.cil-1.c[377340,377353] [2022-12-14 15:59:00,143 WARN L237 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_1b7e069f-3ca3-4412-aadd-025555e160f7/sv-benchmarks/c/combinations/Problem05_label44+token_ring.08.cil-1.c[383339,383352] [2022-12-14 15:59:00,156 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:59:00,196 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:59:00,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:00 WrapperNode [2022-12-14 15:59:00,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:59:00,197 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:59:00,197 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:59:00,197 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:59:00,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:00" (1/1) ... [2022-12-14 15:59:00,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:00" (1/1) ... [2022-12-14 15:59:00,549 INFO L138 Inliner]: procedures = 60, calls = 65, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 12967 [2022-12-14 15:59:00,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:59:00,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:59:00,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:59:00,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:59:00,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:00" (1/1) ... [2022-12-14 15:59:00,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:00" (1/1) ... [2022-12-14 15:59:00,589 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:00" (1/1) ... [2022-12-14 15:59:00,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:00" (1/1) ... [2022-12-14 15:59:00,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:00" (1/1) ... [2022-12-14 15:59:00,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:00" (1/1) ... [2022-12-14 15:59:00,904 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:00" (1/1) ... [2022-12-14 15:59:00,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:00" (1/1) ... [2022-12-14 15:59:00,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:59:00,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:59:00,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:59:00,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:59:00,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:00" (1/1) ... [2022-12-14 15:59:01,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:59:01,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:01,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:59:01,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:59:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:59:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 15:59:01,049 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 15:59:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 15:59:01,049 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 15:59:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 15:59:01,049 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 15:59:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 15:59:01,049 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 15:59:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 15:59:01,050 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 15:59:01,050 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 15:59:01,050 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 15:59:01,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:59:01,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:59:01,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:59:01,168 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:59:01,170 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:59:06,277 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:59:07,766 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:59:07,766 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-12-14 15:59:07,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:59:07 BoogieIcfgContainer [2022-12-14 15:59:07,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:59:07,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:59:07,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:59:07,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:59:07,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:58:57" (1/3) ... [2022-12-14 15:59:07,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c887daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:59:07, skipping insertion in model container [2022-12-14 15:59:07,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:59:00" (2/3) ... [2022-12-14 15:59:07,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c887daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:59:07, skipping insertion in model container [2022-12-14 15:59:07,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:59:07" (3/3) ... [2022-12-14 15:59:07,776 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label44+token_ring.08.cil-1.c [2022-12-14 15:59:07,790 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:59:07,791 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 15:59:07,850 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:59:07,855 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2bb23dd1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:59:07,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 15:59:07,864 INFO L276 IsEmpty]: Start isEmpty. Operand has 1787 states, 1756 states have (on average 1.964123006833713) internal successors, (3449), 1759 states have internal predecessors, (3449), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 15:59:07,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-14 15:59:07,871 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:07,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:07,872 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:07,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:07,876 INFO L85 PathProgramCache]: Analyzing trace with hash 360989134, now seen corresponding path program 1 times [2022-12-14 15:59:07,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:07,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367865364] [2022-12-14 15:59:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:07,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:59:08,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:08,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367865364] [2022-12-14 15:59:08,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367865364] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:08,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:59:08,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 15:59:08,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563892835] [2022-12-14 15:59:08,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:08,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:59:08,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:08,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:59:08,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:59:08,185 INFO L87 Difference]: Start difference. First operand has 1787 states, 1756 states have (on average 1.964123006833713) internal successors, (3449), 1759 states have internal predecessors, (3449), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 15:59:08,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:08,937 INFO L93 Difference]: Finished difference Result 3701 states and 7203 transitions. [2022-12-14 15:59:08,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 15:59:08,939 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2022-12-14 15:59:08,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:08,957 INFO L225 Difference]: With dead ends: 3701 [2022-12-14 15:59:08,958 INFO L226 Difference]: Without dead ends: 1913 [2022-12-14 15:59:08,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 15:59:08,968 INFO L413 NwaCegarLoop]: 3391 mSDtfsCounter, 3647 mSDsluCounter, 3309 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3647 SdHoareTripleChecker+Valid, 6700 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:08,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3647 Valid, 6700 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 15:59:08,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2022-12-14 15:59:09,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1912. [2022-12-14 15:59:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1912 states, 1858 states have (on average 1.9332615715823467) internal successors, (3592), 1861 states have internal predecessors, (3592), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-12-14 15:59:09,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1912 states to 1912 states and 3672 transitions. [2022-12-14 15:59:09,069 INFO L78 Accepts]: Start accepts. Automaton has 1912 states and 3672 transitions. Word has length 55 [2022-12-14 15:59:09,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:09,069 INFO L495 AbstractCegarLoop]: Abstraction has 1912 states and 3672 transitions. [2022-12-14 15:59:09,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 15:59:09,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1912 states and 3672 transitions. [2022-12-14 15:59:09,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 15:59:09,073 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:09,073 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:09,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:59:09,073 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:09,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:09,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1627579508, now seen corresponding path program 1 times [2022-12-14 15:59:09,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:09,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881107090] [2022-12-14 15:59:09,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:09,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:59:09,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:09,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881107090] [2022-12-14 15:59:09,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881107090] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:59:09,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077168163] [2022-12-14 15:59:09,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:09,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:09,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:09,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:59:09,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:59:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:09,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:59:09,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:09,471 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 15:59:09,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:59:09,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077168163] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:09,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:59:09,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:59:09,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412464494] [2022-12-14 15:59:09,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:09,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:59:09,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:09,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:59:09,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:59:09,476 INFO L87 Difference]: Start difference. First operand 1912 states and 3672 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:59:09,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:09,827 INFO L93 Difference]: Finished difference Result 2437 states and 4475 transitions. [2022-12-14 15:59:09,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:59:09,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-12-14 15:59:09,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:09,836 INFO L225 Difference]: With dead ends: 2437 [2022-12-14 15:59:09,837 INFO L226 Difference]: Without dead ends: 2171 [2022-12-14 15:59:09,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:59:09,839 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 3447 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3440 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:09,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3440 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:59:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2022-12-14 15:59:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2167. [2022-12-14 15:59:09,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2167 states, 2067 states have (on average 1.8872762457668117) internal successors, (3901), 2071 states have internal predecessors, (3901), 74 states have call successors, (74), 24 states have call predecessors, (74), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2022-12-14 15:59:09,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2167 states to 2167 states and 4049 transitions. [2022-12-14 15:59:09,887 INFO L78 Accepts]: Start accepts. Automaton has 2167 states and 4049 transitions. Word has length 108 [2022-12-14 15:59:09,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:09,888 INFO L495 AbstractCegarLoop]: Abstraction has 2167 states and 4049 transitions. [2022-12-14 15:59:09,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:59:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2167 states and 4049 transitions. [2022-12-14 15:59:09,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 15:59:09,891 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:09,892 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:09,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:59:10,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:10,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:10,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:10,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1807819052, now seen corresponding path program 1 times [2022-12-14 15:59:10,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:10,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707384602] [2022-12-14 15:59:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:10,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:59:10,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:10,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707384602] [2022-12-14 15:59:10,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707384602] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:59:10,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629860987] [2022-12-14 15:59:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:10,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:10,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:10,220 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:59:10,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:59:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:10,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:59:10,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 15:59:10,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:59:10,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629860987] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:10,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:59:10,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:59:10,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591573090] [2022-12-14 15:59:10,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:10,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:59:10,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:10,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:59:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:59:10,396 INFO L87 Difference]: Start difference. First operand 2167 states and 4049 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:59:10,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:10,768 INFO L93 Difference]: Finished difference Result 3196 states and 5616 transitions. [2022-12-14 15:59:10,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:59:10,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-12-14 15:59:10,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:10,776 INFO L225 Difference]: With dead ends: 3196 [2022-12-14 15:59:10,776 INFO L226 Difference]: Without dead ends: 2675 [2022-12-14 15:59:10,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:59:10,779 INFO L413 NwaCegarLoop]: 3274 mSDtfsCounter, 3453 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3439 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:10,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3453 Valid, 3439 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:59:10,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2675 states. [2022-12-14 15:59:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2675 to 2669. [2022-12-14 15:59:10,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2669 states, 2479 states have (on average 1.81807180314643) internal successors, (4507), 2485 states have internal predecessors, (4507), 140 states have call successors, (140), 48 states have call predecessors, (140), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2022-12-14 15:59:10,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2669 states to 2669 states and 4787 transitions. [2022-12-14 15:59:10,841 INFO L78 Accepts]: Start accepts. Automaton has 2669 states and 4787 transitions. Word has length 108 [2022-12-14 15:59:10,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:10,841 INFO L495 AbstractCegarLoop]: Abstraction has 2669 states and 4787 transitions. [2022-12-14 15:59:10,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:59:10,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2669 states and 4787 transitions. [2022-12-14 15:59:10,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 15:59:10,844 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:10,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:10,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:59:11,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:11,045 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:11,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:11,045 INFO L85 PathProgramCache]: Analyzing trace with hash 613576396, now seen corresponding path program 1 times [2022-12-14 15:59:11,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:11,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107541734] [2022-12-14 15:59:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:11,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:59:11,139 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:11,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107541734] [2022-12-14 15:59:11,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107541734] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:59:11,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480344706] [2022-12-14 15:59:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:11,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:11,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:11,140 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:59:11,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:59:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:11,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:59:11,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 15:59:11,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:59:11,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480344706] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:11,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:59:11,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:59:11,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885496163] [2022-12-14 15:59:11,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:11,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:59:11,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:11,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:59:11,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:59:11,299 INFO L87 Difference]: Start difference. First operand 2669 states and 4787 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:59:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:11,678 INFO L93 Difference]: Finished difference Result 4690 states and 7848 transitions. [2022-12-14 15:59:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:59:11,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-12-14 15:59:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:11,691 INFO L225 Difference]: With dead ends: 4690 [2022-12-14 15:59:11,692 INFO L226 Difference]: Without dead ends: 3667 [2022-12-14 15:59:11,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:59:11,696 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 3456 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3456 SdHoareTripleChecker+Valid, 3411 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:11,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3456 Valid, 3411 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:59:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3667 states. [2022-12-14 15:59:11,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3667 to 3657. [2022-12-14 15:59:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3657 states, 3291 states have (on average 1.7304770586447888) internal successors, (5695), 3301 states have internal predecessors, (5695), 268 states have call successors, (268), 96 states have call predecessors, (268), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2022-12-14 15:59:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3657 states to 3657 states and 6231 transitions. [2022-12-14 15:59:11,813 INFO L78 Accepts]: Start accepts. Automaton has 3657 states and 6231 transitions. Word has length 108 [2022-12-14 15:59:11,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:11,814 INFO L495 AbstractCegarLoop]: Abstraction has 3657 states and 6231 transitions. [2022-12-14 15:59:11,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:59:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3657 states and 6231 transitions. [2022-12-14 15:59:11,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 15:59:11,817 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:11,818 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:11,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 15:59:12,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:12,018 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:12,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:12,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1855275732, now seen corresponding path program 1 times [2022-12-14 15:59:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:12,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933108205] [2022-12-14 15:59:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:12,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:12,106 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:59:12,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:12,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933108205] [2022-12-14 15:59:12,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933108205] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:59:12,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852122727] [2022-12-14 15:59:12,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:12,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:12,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:12,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:59:12,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:59:12,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:12,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:59:12,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 15:59:12,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:59:12,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852122727] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:12,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:59:12,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 15:59:12,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282469684] [2022-12-14 15:59:12,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:12,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:59:12,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:12,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:59:12,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:59:12,293 INFO L87 Difference]: Start difference. First operand 3657 states and 6231 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:59:12,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:12,764 INFO L93 Difference]: Finished difference Result 7630 states and 12212 transitions. [2022-12-14 15:59:12,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:59:12,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 108 [2022-12-14 15:59:12,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:12,785 INFO L225 Difference]: With dead ends: 7630 [2022-12-14 15:59:12,785 INFO L226 Difference]: Without dead ends: 5619 [2022-12-14 15:59:12,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:59:12,791 INFO L413 NwaCegarLoop]: 3246 mSDtfsCounter, 3441 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3441 SdHoareTripleChecker+Valid, 3411 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:12,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3441 Valid, 3411 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:59:12,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2022-12-14 15:59:12,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 5601. [2022-12-14 15:59:12,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5601 states, 4891 states have (on average 1.6403598446125536) internal successors, (8023), 4909 states have internal predecessors, (8023), 516 states have call successors, (516), 192 states have call predecessors, (516), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2022-12-14 15:59:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5601 states to 5601 states and 9055 transitions. [2022-12-14 15:59:12,925 INFO L78 Accepts]: Start accepts. Automaton has 5601 states and 9055 transitions. Word has length 108 [2022-12-14 15:59:12,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:12,926 INFO L495 AbstractCegarLoop]: Abstraction has 5601 states and 9055 transitions. [2022-12-14 15:59:12,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 15:59:12,926 INFO L276 IsEmpty]: Start isEmpty. Operand 5601 states and 9055 transitions. [2022-12-14 15:59:12,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 15:59:12,931 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:12,931 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:12,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:59:13,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:13,132 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:13,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:13,132 INFO L85 PathProgramCache]: Analyzing trace with hash 747338444, now seen corresponding path program 1 times [2022-12-14 15:59:13,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:13,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37989488] [2022-12-14 15:59:13,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:13,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 15:59:13,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:13,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37989488] [2022-12-14 15:59:13,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37989488] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:13,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:59:13,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:59:13,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314776304] [2022-12-14 15:59:13,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:13,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:59:13,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:13,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:59:13,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:59:13,203 INFO L87 Difference]: Start difference. First operand 5601 states and 9055 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 15:59:13,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:13,705 INFO L93 Difference]: Finished difference Result 8675 states and 13712 transitions. [2022-12-14 15:59:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:59:13,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 108 [2022-12-14 15:59:13,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:13,726 INFO L225 Difference]: With dead ends: 8675 [2022-12-14 15:59:13,727 INFO L226 Difference]: Without dead ends: 6657 [2022-12-14 15:59:13,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:59:13,733 INFO L413 NwaCegarLoop]: 3324 mSDtfsCounter, 91 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 6562 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:13,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 6562 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:59:13,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6657 states. [2022-12-14 15:59:13,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6657 to 6321. [2022-12-14 15:59:13,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6321 states, 5579 states have (on average 1.6502957519268686) internal successors, (9207), 5597 states have internal predecessors, (9207), 532 states have call successors, (532), 208 states have call predecessors, (532), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2022-12-14 15:59:13,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6321 states to 6321 states and 10271 transitions. [2022-12-14 15:59:13,892 INFO L78 Accepts]: Start accepts. Automaton has 6321 states and 10271 transitions. Word has length 108 [2022-12-14 15:59:13,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:13,892 INFO L495 AbstractCegarLoop]: Abstraction has 6321 states and 10271 transitions. [2022-12-14 15:59:13,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 15:59:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 6321 states and 10271 transitions. [2022-12-14 15:59:13,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 15:59:13,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:13,901 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:13,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 15:59:13,901 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:13,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:13,901 INFO L85 PathProgramCache]: Analyzing trace with hash 379601281, now seen corresponding path program 1 times [2022-12-14 15:59:13,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:13,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149795320] [2022-12-14 15:59:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:13,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 15:59:13,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:13,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149795320] [2022-12-14 15:59:13,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149795320] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:13,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:59:13,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:59:13,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080625452] [2022-12-14 15:59:13,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:13,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:59:13,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:13,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:59:13,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:59:13,966 INFO L87 Difference]: Start difference. First operand 6321 states and 10271 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:59:14,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:14,517 INFO L93 Difference]: Finished difference Result 15526 states and 24292 transitions. [2022-12-14 15:59:14,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:59:14,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 15:59:14,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:14,542 INFO L225 Difference]: With dead ends: 15526 [2022-12-14 15:59:14,542 INFO L226 Difference]: Without dead ends: 10851 [2022-12-14 15:59:14,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:59:14,553 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3443 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:14,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:59:14,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10851 states. [2022-12-14 15:59:14,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10851 to 10801. [2022-12-14 15:59:14,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10801 states, 9355 states have (on average 1.5845002672367718) internal successors, (14823), 9389 states have internal predecessors, (14823), 1028 states have call successors, (1028), 416 states have call predecessors, (1028), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2022-12-14 15:59:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10801 states to 10801 states and 16879 transitions. [2022-12-14 15:59:14,934 INFO L78 Accepts]: Start accepts. Automaton has 10801 states and 16879 transitions. Word has length 146 [2022-12-14 15:59:14,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:14,935 INFO L495 AbstractCegarLoop]: Abstraction has 10801 states and 16879 transitions. [2022-12-14 15:59:14,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:59:14,935 INFO L276 IsEmpty]: Start isEmpty. Operand 10801 states and 16879 transitions. [2022-12-14 15:59:14,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 15:59:14,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:14,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:14,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 15:59:14,957 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:14,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:14,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1938159869, now seen corresponding path program 1 times [2022-12-14 15:59:14,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:14,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163783081] [2022-12-14 15:59:14,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:14,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 15:59:15,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:15,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163783081] [2022-12-14 15:59:15,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163783081] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:15,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:59:15,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:59:15,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140230670] [2022-12-14 15:59:15,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:15,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:59:15,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:15,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:59:15,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:59:15,039 INFO L87 Difference]: Start difference. First operand 10801 states and 16879 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:59:15,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:15,785 INFO L93 Difference]: Finished difference Result 28822 states and 44116 transitions. [2022-12-14 15:59:15,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:59:15,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 15:59:15,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:15,826 INFO L225 Difference]: With dead ends: 28822 [2022-12-14 15:59:15,826 INFO L226 Difference]: Without dead ends: 19667 [2022-12-14 15:59:15,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:59:15,840 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3445 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:15,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:59:15,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19667 states. [2022-12-14 15:59:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19667 to 19569. [2022-12-14 15:59:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19569 states, 16747 states have (on average 1.536693139069684) internal successors, (25735), 16813 states have internal predecessors, (25735), 1988 states have call successors, (1988), 832 states have call predecessors, (1988), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2022-12-14 15:59:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19569 states to 19569 states and 29711 transitions. [2022-12-14 15:59:16,336 INFO L78 Accepts]: Start accepts. Automaton has 19569 states and 29711 transitions. Word has length 146 [2022-12-14 15:59:16,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:16,336 INFO L495 AbstractCegarLoop]: Abstraction has 19569 states and 29711 transitions. [2022-12-14 15:59:16,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:59:16,337 INFO L276 IsEmpty]: Start isEmpty. Operand 19569 states and 29711 transitions. [2022-12-14 15:59:16,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 15:59:16,362 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:16,362 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:16,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 15:59:16,363 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:16,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:16,363 INFO L85 PathProgramCache]: Analyzing trace with hash -197887228, now seen corresponding path program 1 times [2022-12-14 15:59:16,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:16,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721340382] [2022-12-14 15:59:16,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:16,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:16,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 15:59:16,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:16,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721340382] [2022-12-14 15:59:16,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721340382] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:16,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:59:16,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:59:16,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452787445] [2022-12-14 15:59:16,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:16,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:59:16,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:16,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:59:16,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:59:16,425 INFO L87 Difference]: Start difference. First operand 19569 states and 29711 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:59:17,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:17,564 INFO L93 Difference]: Finished difference Result 54838 states and 82580 transitions. [2022-12-14 15:59:17,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:59:17,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 15:59:17,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:17,644 INFO L225 Difference]: With dead ends: 54838 [2022-12-14 15:59:17,644 INFO L226 Difference]: Without dead ends: 36915 [2022-12-14 15:59:17,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:59:17,677 INFO L413 NwaCegarLoop]: 3248 mSDtfsCounter, 3447 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3413 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:17,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3413 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:59:17,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36915 states. [2022-12-14 15:59:18,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36915 to 36721. [2022-12-14 15:59:18,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36721 states, 31211 states have (on average 1.5032840985549967) internal successors, (46919), 31341 states have internal predecessors, (46919), 3844 states have call successors, (3844), 1664 states have call predecessors, (3844), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2022-12-14 15:59:18,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36721 states to 36721 states and 54607 transitions. [2022-12-14 15:59:18,825 INFO L78 Accepts]: Start accepts. Automaton has 36721 states and 54607 transitions. Word has length 146 [2022-12-14 15:59:18,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:18,826 INFO L495 AbstractCegarLoop]: Abstraction has 36721 states and 54607 transitions. [2022-12-14 15:59:18,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:59:18,826 INFO L276 IsEmpty]: Start isEmpty. Operand 36721 states and 54607 transitions. [2022-12-14 15:59:18,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 15:59:18,873 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:18,873 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:18,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 15:59:18,873 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:18,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:18,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1460919752, now seen corresponding path program 1 times [2022-12-14 15:59:18,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:18,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470209456] [2022-12-14 15:59:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:18,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 15:59:18,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:18,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470209456] [2022-12-14 15:59:18,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470209456] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:18,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:59:18,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 15:59:18,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360528925] [2022-12-14 15:59:18,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:18,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:59:18,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:18,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:59:18,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:59:18,932 INFO L87 Difference]: Start difference. First operand 36721 states and 54607 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:59:20,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:20,886 INFO L93 Difference]: Finished difference Result 105718 states and 157140 transitions. [2022-12-14 15:59:20,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:59:20,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 146 [2022-12-14 15:59:20,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:21,037 INFO L225 Difference]: With dead ends: 105718 [2022-12-14 15:59:21,037 INFO L226 Difference]: Without dead ends: 70643 [2022-12-14 15:59:21,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 15:59:21,100 INFO L413 NwaCegarLoop]: 3262 mSDtfsCounter, 3450 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3450 SdHoareTripleChecker+Valid, 3427 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:21,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3450 Valid, 3427 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:59:21,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70643 states. [2022-12-14 15:59:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70643 to 70257. [2022-12-14 15:59:23,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70257 states, 59499 states have (on average 1.4791341030941696) internal successors, (88007), 59757 states have internal predecessors, (88007), 7428 states have call successors, (7428), 3328 states have call predecessors, (7428), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2022-12-14 15:59:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70257 states to 70257 states and 102863 transitions. [2022-12-14 15:59:23,407 INFO L78 Accepts]: Start accepts. Automaton has 70257 states and 102863 transitions. Word has length 146 [2022-12-14 15:59:23,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:23,408 INFO L495 AbstractCegarLoop]: Abstraction has 70257 states and 102863 transitions. [2022-12-14 15:59:23,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 15:59:23,408 INFO L276 IsEmpty]: Start isEmpty. Operand 70257 states and 102863 transitions. [2022-12-14 15:59:23,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 15:59:23,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:23,518 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:23,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 15:59:23,518 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:23,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:23,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1062080811, now seen corresponding path program 1 times [2022-12-14 15:59:23,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:23,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443569087] [2022-12-14 15:59:23,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:23,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 19 proven. 59 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 15:59:23,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:23,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443569087] [2022-12-14 15:59:23,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443569087] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:59:23,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165314063] [2022-12-14 15:59:23,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:23,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:23,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:23,959 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:59:23,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:59:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:24,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:59:24,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 15:59:24,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:59:24,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165314063] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:24,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:59:24,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:59:24,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099826964] [2022-12-14 15:59:24,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:24,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:59:24,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:24,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:59:24,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:59:24,151 INFO L87 Difference]: Start difference. First operand 70257 states and 102863 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:59:27,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:27,148 INFO L93 Difference]: Finished difference Result 133109 states and 196305 transitions. [2022-12-14 15:59:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:59:27,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 167 [2022-12-14 15:59:27,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:27,417 INFO L225 Difference]: With dead ends: 133109 [2022-12-14 15:59:27,417 INFO L226 Difference]: Without dead ends: 98035 [2022-12-14 15:59:27,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:59:27,500 INFO L413 NwaCegarLoop]: 3363 mSDtfsCounter, 140 mSDsluCounter, 3240 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 6603 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:27,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 6603 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:59:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98035 states. [2022-12-14 15:59:30,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98035 to 85105. [2022-12-14 15:59:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85105 states, 73579 states have (on average 1.5196591418747196) internal successors, (111815), 73837 states have internal predecessors, (111815), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-12-14 15:59:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85105 states to 85105 states and 127439 transitions. [2022-12-14 15:59:30,405 INFO L78 Accepts]: Start accepts. Automaton has 85105 states and 127439 transitions. Word has length 167 [2022-12-14 15:59:30,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:30,405 INFO L495 AbstractCegarLoop]: Abstraction has 85105 states and 127439 transitions. [2022-12-14 15:59:30,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:59:30,406 INFO L276 IsEmpty]: Start isEmpty. Operand 85105 states and 127439 transitions. [2022-12-14 15:59:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 15:59:30,526 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:30,526 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:30,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:59:30,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 15:59:30,728 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:30,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:30,730 INFO L85 PathProgramCache]: Analyzing trace with hash -967257311, now seen corresponding path program 2 times [2022-12-14 15:59:30,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:30,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892950812] [2022-12-14 15:59:30,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:30,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:30,956 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 15:59:30,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:30,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892950812] [2022-12-14 15:59:30,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892950812] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:59:30,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658647293] [2022-12-14 15:59:30,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 15:59:30,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:30,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:30,958 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:59:30,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:59:31,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 15:59:31,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 15:59:31,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:59:31,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 15:59:31,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:59:31,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658647293] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:31,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:59:31,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:59:31,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740130456] [2022-12-14 15:59:31,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:31,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:59:31,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:31,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:59:31,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:59:31,123 INFO L87 Difference]: Start difference. First operand 85105 states and 127439 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:59:33,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:33,911 INFO L93 Difference]: Finished difference Result 135285 states and 205777 transitions. [2022-12-14 15:59:33,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:59:33,912 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 167 [2022-12-14 15:59:33,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:34,105 INFO L225 Difference]: With dead ends: 135285 [2022-12-14 15:59:34,105 INFO L226 Difference]: Without dead ends: 85363 [2022-12-14 15:59:34,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:59:34,170 INFO L413 NwaCegarLoop]: 3385 mSDtfsCounter, 171 mSDsluCounter, 3223 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 6608 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:34,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 6608 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:59:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85363 states. [2022-12-14 15:59:37,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85363 to 84849. [2022-12-14 15:59:37,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84849 states, 73323 states have (on average 1.5075078761098155) internal successors, (110535), 73581 states have internal predecessors, (110535), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-12-14 15:59:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84849 states to 84849 states and 126159 transitions. [2022-12-14 15:59:37,329 INFO L78 Accepts]: Start accepts. Automaton has 84849 states and 126159 transitions. Word has length 167 [2022-12-14 15:59:37,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:37,329 INFO L495 AbstractCegarLoop]: Abstraction has 84849 states and 126159 transitions. [2022-12-14 15:59:37,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:59:37,330 INFO L276 IsEmpty]: Start isEmpty. Operand 84849 states and 126159 transitions. [2022-12-14 15:59:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 15:59:37,453 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:37,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:37,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 15:59:37,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 15:59:37,655 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:37,656 INFO L85 PathProgramCache]: Analyzing trace with hash -450616541, now seen corresponding path program 1 times [2022-12-14 15:59:37,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:37,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725499230] [2022-12-14 15:59:37,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:37,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 15:59:37,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:37,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725499230] [2022-12-14 15:59:37,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725499230] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:59:37,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054392719] [2022-12-14 15:59:37,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:37,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:37,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:37,847 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:59:37,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:59:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:37,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:59:38,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 15:59:38,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:59:38,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054392719] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:38,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:59:38,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:59:38,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029450867] [2022-12-14 15:59:38,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:38,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:59:38,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:38,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:59:38,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:59:38,034 INFO L87 Difference]: Start difference. First operand 84849 states and 126159 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:59:40,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:40,652 INFO L93 Difference]: Finished difference Result 127669 states and 191953 transitions. [2022-12-14 15:59:40,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:59:40,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 167 [2022-12-14 15:59:40,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:40,852 INFO L225 Difference]: With dead ends: 127669 [2022-12-14 15:59:40,853 INFO L226 Difference]: Without dead ends: 85107 [2022-12-14 15:59:40,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:59:40,944 INFO L413 NwaCegarLoop]: 3373 mSDtfsCounter, 172 mSDsluCounter, 3222 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 6595 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:40,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 6595 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 15:59:41,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85107 states. [2022-12-14 15:59:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85107 to 84209. [2022-12-14 15:59:44,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84209 states, 72683 states have (on average 1.4926048732165706) internal successors, (108487), 72941 states have internal predecessors, (108487), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2022-12-14 15:59:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84209 states to 84209 states and 124111 transitions. [2022-12-14 15:59:44,255 INFO L78 Accepts]: Start accepts. Automaton has 84209 states and 124111 transitions. Word has length 167 [2022-12-14 15:59:44,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:44,255 INFO L495 AbstractCegarLoop]: Abstraction has 84209 states and 124111 transitions. [2022-12-14 15:59:44,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 15:59:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 84209 states and 124111 transitions. [2022-12-14 15:59:44,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-12-14 15:59:44,410 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:44,410 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:44,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:59:44,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:44,612 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:44,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:44,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1519798369, now seen corresponding path program 1 times [2022-12-14 15:59:44,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:44,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188937933] [2022-12-14 15:59:44,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:44,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 15:59:44,878 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:44,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188937933] [2022-12-14 15:59:44,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188937933] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:59:44,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999513822] [2022-12-14 15:59:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:44,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:44,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:44,879 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:59:44,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:59:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:45,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 15:59:45,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 15:59:45,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:59:45,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999513822] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:45,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:59:45,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 15:59:45,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967809382] [2022-12-14 15:59:45,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:45,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 15:59:45,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:45,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 15:59:45,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:59:45,084 INFO L87 Difference]: Start difference. First operand 84209 states and 124111 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:59:48,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:48,052 INFO L93 Difference]: Finished difference Result 144493 states and 209034 transitions. [2022-12-14 15:59:48,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 15:59:48,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 167 [2022-12-14 15:59:48,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:59:48,285 INFO L225 Difference]: With dead ends: 144493 [2022-12-14 15:59:48,285 INFO L226 Difference]: Without dead ends: 102891 [2022-12-14 15:59:48,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:59:48,376 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 3451 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 3305 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:59:48,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 3305 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:59:48,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102891 states. [2022-12-14 15:59:51,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102891 to 102891. [2022-12-14 15:59:51,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102891 states, 89833 states have (on average 1.4384580276735721) internal successors, (129221), 90091 states have internal predecessors, (129221), 8322 states have call successors, (8322), 4734 states have call predecessors, (8322), 4734 states have return successors, (8322), 8066 states have call predecessors, (8322), 8322 states have call successors, (8322) [2022-12-14 15:59:51,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102891 states to 102891 states and 145865 transitions. [2022-12-14 15:59:51,891 INFO L78 Accepts]: Start accepts. Automaton has 102891 states and 145865 transitions. Word has length 167 [2022-12-14 15:59:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:59:51,891 INFO L495 AbstractCegarLoop]: Abstraction has 102891 states and 145865 transitions. [2022-12-14 15:59:51,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 15:59:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 102891 states and 145865 transitions. [2022-12-14 15:59:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 15:59:52,017 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:59:52,017 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:59:52,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:59:52,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 15:59:52,219 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:59:52,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:59:52,220 INFO L85 PathProgramCache]: Analyzing trace with hash -997138390, now seen corresponding path program 1 times [2022-12-14 15:59:52,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:59:52,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674574410] [2022-12-14 15:59:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:52,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:59:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 15:59:52,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:59:52,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674574410] [2022-12-14 15:59:52,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674574410] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:59:52,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099904949] [2022-12-14 15:59:52,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:59:52,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:59:52,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:59:52,393 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:59:52,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:59:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:59:52,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 15:59:52,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:59:52,615 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 15:59:52,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:59:52,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099904949] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:59:52,616 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:59:52,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 15:59:52,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350518186] [2022-12-14 15:59:52,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:59:52,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:59:52,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:59:52,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:59:52,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:59:52,617 INFO L87 Difference]: Start difference. First operand 102891 states and 145865 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 15:59:59,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:59:59,601 INFO L93 Difference]: Finished difference Result 309085 states and 435513 transitions. [2022-12-14 15:59:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:59:59,602 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), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 168 [2022-12-14 15:59:59,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:00:00,121 INFO L225 Difference]: With dead ends: 309085 [2022-12-14 16:00:00,121 INFO L226 Difference]: Without dead ends: 207841 [2022-12-14 16:00:00,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 16:00:00,274 INFO L413 NwaCegarLoop]: 3427 mSDtfsCounter, 3477 mSDsluCounter, 3558 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 6985 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:00:00,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3477 Valid, 6985 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:00:00,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207841 states. [2022-12-14 16:00:07,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207841 to 207583. [2022-12-14 16:00:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207583 states, 181477 states have (on average 1.4215851044484975) internal successors, (257985), 182247 states have internal predecessors, (257985), 16382 states have call successors, (16382), 9466 states have call predecessors, (16382), 9722 states have return successors, (17150), 15870 states have call predecessors, (17150), 16382 states have call successors, (17150) [2022-12-14 16:00:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207583 states to 207583 states and 291517 transitions. [2022-12-14 16:00:07,588 INFO L78 Accepts]: Start accepts. Automaton has 207583 states and 291517 transitions. Word has length 168 [2022-12-14 16:00:07,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:00:07,588 INFO L495 AbstractCegarLoop]: Abstraction has 207583 states and 291517 transitions. [2022-12-14 16:00:07,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 16:00:07,588 INFO L276 IsEmpty]: Start isEmpty. Operand 207583 states and 291517 transitions. [2022-12-14 16:00:07,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-14 16:00:07,900 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:00:07,900 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:00:07,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 16:00:08,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 16:00:08,101 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:00:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:00:08,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1181070461, now seen corresponding path program 1 times [2022-12-14 16:00:08,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:00:08,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360963950] [2022-12-14 16:00:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:00:08,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:00:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:00:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 16:00:08,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:00:08,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360963950] [2022-12-14 16:00:08,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360963950] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:00:08,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106540377] [2022-12-14 16:00:08,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:00:08,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:00:08,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:00:08,277 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:00:08,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 16:00:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:00:08,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:00:08,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:00:08,454 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 16:00:08,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:00:08,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106540377] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:00:08,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:00:08,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 16:00:08,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460745278] [2022-12-14 16:00:08,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:00:08,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:00:08,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:00:08,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:00:08,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:00:08,455 INFO L87 Difference]: Start difference. First operand 207583 states and 291517 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 16:00:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:00:18,573 INFO L93 Difference]: Finished difference Result 491081 states and 701088 transitions. [2022-12-14 16:00:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:00:18,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 168 [2022-12-14 16:00:18,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:00:19,341 INFO L225 Difference]: With dead ends: 491081 [2022-12-14 16:00:19,341 INFO L226 Difference]: Without dead ends: 285145 [2022-12-14 16:00:19,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:00:19,607 INFO L413 NwaCegarLoop]: 3257 mSDtfsCounter, 93 mSDsluCounter, 3229 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 6486 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:00:19,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 6486 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:00:19,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285145 states. [2022-12-14 16:00:28,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285145 to 236267. [2022-12-14 16:00:28,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236267 states, 208619 states have (on average 1.4526337486039143) internal successors, (303047), 209391 states have internal predecessors, (303047), 17153 states have call successors, (17153), 10237 states have call predecessors, (17153), 10493 states have return successors, (17921), 16639 states have call predecessors, (17921), 17153 states have call successors, (17921) [2022-12-14 16:00:29,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236267 states to 236267 states and 338121 transitions. [2022-12-14 16:00:29,021 INFO L78 Accepts]: Start accepts. Automaton has 236267 states and 338121 transitions. Word has length 168 [2022-12-14 16:00:29,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:00:29,022 INFO L495 AbstractCegarLoop]: Abstraction has 236267 states and 338121 transitions. [2022-12-14 16:00:29,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 16:00:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand 236267 states and 338121 transitions. [2022-12-14 16:00:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-12-14 16:00:29,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:00:29,477 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:00:29,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 16:00:29,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 16:00:29,679 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:00:29,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:00:29,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1560264280, now seen corresponding path program 1 times [2022-12-14 16:00:29,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:00:29,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915333531] [2022-12-14 16:00:29,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:00:29,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:00:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:00:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-12-14 16:00:29,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:00:29,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915333531] [2022-12-14 16:00:29,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915333531] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:00:29,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696080932] [2022-12-14 16:00:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:00:29,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:00:29,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:00:29,848 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:00:29,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 16:00:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:00:30,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 16:00:30,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:00:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 16:00:30,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:00:30,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696080932] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:00:30,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:00:30,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 16:00:30,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363410849] [2022-12-14 16:00:30,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:00:30,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:00:30,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:00:30,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:00:30,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:00:30,101 INFO L87 Difference]: Start difference. First operand 236267 states and 338121 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:00:44,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:00:44,475 INFO L93 Difference]: Finished difference Result 583639 states and 833651 transitions. [2022-12-14 16:00:44,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:00:44,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 169 [2022-12-14 16:00:44,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:00:45,352 INFO L225 Difference]: With dead ends: 583639 [2022-12-14 16:00:45,352 INFO L226 Difference]: Without dead ends: 349019 [2022-12-14 16:00:45,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 16:00:45,639 INFO L413 NwaCegarLoop]: 3227 mSDtfsCounter, 7220 mSDsluCounter, 6352 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7237 SdHoareTripleChecker+Valid, 9579 SdHoareTripleChecker+Invalid, 980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 16:00:45,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7237 Valid, 9579 Invalid, 980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 16:00:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349019 states. [2022-12-14 16:01:00,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349019 to 349017. [2022-12-14 16:01:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349017 states, 307813 states have (on average 1.4412939024667575) internal successors, (443649), 308969 states have internal predecessors, (443649), 25467 states have call successors, (25467), 15351 states have call predecessors, (25467), 15735 states have return successors, (26619), 24697 states have call predecessors, (26619), 25467 states have call successors, (26619) [2022-12-14 16:01:01,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349017 states to 349017 states and 495735 transitions. [2022-12-14 16:01:01,113 INFO L78 Accepts]: Start accepts. Automaton has 349017 states and 495735 transitions. Word has length 169 [2022-12-14 16:01:01,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:01:01,114 INFO L495 AbstractCegarLoop]: Abstraction has 349017 states and 495735 transitions. [2022-12-14 16:01:01,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:01:01,114 INFO L276 IsEmpty]: Start isEmpty. Operand 349017 states and 495735 transitions. [2022-12-14 16:01:01,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-12-14 16:01:01,658 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:01:01,658 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:01:01,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 16:01:01,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:01:01,860 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:01:01,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:01:01,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1123676634, now seen corresponding path program 1 times [2022-12-14 16:01:01,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:01:01,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014184299] [2022-12-14 16:01:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:01:01,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:01:01,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:01:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 16:01:02,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:01:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014184299] [2022-12-14 16:01:02,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014184299] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:01:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785956761] [2022-12-14 16:01:02,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:01:02,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:01:02,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:01:02,047 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:01:02,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 16:01:02,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:01:02,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 16:01:02,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:01:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 16:01:02,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:01:02,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785956761] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:01:02,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:01:02,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 16:01:02,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301843851] [2022-12-14 16:01:02,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:01:02,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:01:02,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:01:02,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:01:02,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:01:02,306 INFO L87 Difference]: Start difference. First operand 349017 states and 495735 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:01:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:01:27,326 INFO L93 Difference]: Finished difference Result 862081 states and 1222013 transitions. [2022-12-14 16:01:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:01:27,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 171 [2022-12-14 16:01:27,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:01:28,947 INFO L225 Difference]: With dead ends: 862081 [2022-12-14 16:01:28,947 INFO L226 Difference]: Without dead ends: 514711 [2022-12-14 16:01:29,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 16:01:29,418 INFO L413 NwaCegarLoop]: 3227 mSDtfsCounter, 3836 mSDsluCounter, 6427 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3853 SdHoareTripleChecker+Valid, 9654 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:01:29,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3853 Valid, 9654 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 16:01:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514711 states. [2022-12-14 16:01:53,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514711 to 514709. [2022-12-14 16:01:54,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514709 states, 453305 states have (on average 1.428629730534629) internal successors, (647605), 455037 states have internal predecessors, (647605), 37807 states have call successors, (37807), 23019 states have call predecessors, (37807), 23595 states have return successors, (39535), 36653 states have call predecessors, (39535), 37807 states have call successors, (39535) [2022-12-14 16:01:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514709 states to 514709 states and 724947 transitions. [2022-12-14 16:01:55,514 INFO L78 Accepts]: Start accepts. Automaton has 514709 states and 724947 transitions. Word has length 171 [2022-12-14 16:01:55,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:01:55,514 INFO L495 AbstractCegarLoop]: Abstraction has 514709 states and 724947 transitions. [2022-12-14 16:01:55,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:01:55,514 INFO L276 IsEmpty]: Start isEmpty. Operand 514709 states and 724947 transitions. [2022-12-14 16:01:56,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 16:01:56,332 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:01:56,332 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:01:56,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 16:01:56,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 16:01:56,535 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:01:56,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:01:56,536 INFO L85 PathProgramCache]: Analyzing trace with hash 443290712, now seen corresponding path program 1 times [2022-12-14 16:01:56,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:01:56,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734336180] [2022-12-14 16:01:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:01:56,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:01:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:01:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 13 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 16:01:56,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:01:56,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734336180] [2022-12-14 16:01:56,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734336180] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:01:56,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073824632] [2022-12-14 16:01:56,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:01:56,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:01:56,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:01:56,695 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:01:56,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 16:01:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:01:56,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 16:01:56,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:01:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-12-14 16:01:56,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:01:56,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073824632] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:01:56,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:01:56,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 16:01:56,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606847506] [2022-12-14 16:01:56,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:01:56,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:01:56,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:01:56,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:01:56,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:01:56,917 INFO L87 Difference]: Start difference. First operand 514709 states and 724947 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:02:20,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:02:20,168 INFO L93 Difference]: Finished difference Result 923824 states and 1295254 transitions. [2022-12-14 16:02:20,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:02:20,169 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 173 [2022-12-14 16:02:20,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:02:21,276 INFO L225 Difference]: With dead ends: 923824 [2022-12-14 16:02:21,276 INFO L226 Difference]: Without dead ends: 410762 [2022-12-14 16:02:22,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 16:02:22,012 INFO L413 NwaCegarLoop]: 3242 mSDtfsCounter, 3814 mSDsluCounter, 6461 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3831 SdHoareTripleChecker+Valid, 9703 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 16:02:22,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3831 Valid, 9703 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 16:02:22,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410762 states. [2022-12-14 16:02:42,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410762 to 394398. [2022-12-14 16:02:42,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394398 states, 347465 states have (on average 1.4243707999366844) internal successors, (494919), 348908 states have internal predecessors, (494919), 28509 states have call successors, (28509), 17270 states have call predecessors, (28509), 18422 states have return successors, (29661), 28220 states have call predecessors, (29661), 28509 states have call successors, (29661) [2022-12-14 16:02:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394398 states to 394398 states and 553089 transitions. [2022-12-14 16:02:43,851 INFO L78 Accepts]: Start accepts. Automaton has 394398 states and 553089 transitions. Word has length 173 [2022-12-14 16:02:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:02:43,852 INFO L495 AbstractCegarLoop]: Abstraction has 394398 states and 553089 transitions. [2022-12-14 16:02:43,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:02:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 394398 states and 553089 transitions. [2022-12-14 16:02:44,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 16:02:44,421 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:02:44,421 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:02:44,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 16:02:44,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:02:44,623 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:02:44,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:02:44,624 INFO L85 PathProgramCache]: Analyzing trace with hash 2007835932, now seen corresponding path program 2 times [2022-12-14 16:02:44,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:02:44,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112398633] [2022-12-14 16:02:44,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:02:44,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:02:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:02:44,920 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 14 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 16:02:44,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:02:44,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112398633] [2022-12-14 16:02:44,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112398633] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:02:44,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912625413] [2022-12-14 16:02:44,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 16:02:44,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:02:44,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:02:44,921 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:02:44,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 16:02:45,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 16:02:45,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 16:02:45,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 16:02:45,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:02:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 16:02:45,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:02:45,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912625413] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:02:45,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:02:45,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 16:02:45,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996401343] [2022-12-14 16:02:45,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:02:45,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:02:45,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:02:45,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:02:45,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:02:45,097 INFO L87 Difference]: Start difference. First operand 394398 states and 553089 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 16:03:04,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:04,914 INFO L93 Difference]: Finished difference Result 528260 states and 742294 transitions. [2022-12-14 16:03:04,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:03:04,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 174 [2022-12-14 16:03:04,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:05,906 INFO L225 Difference]: With dead ends: 528260 [2022-12-14 16:03:05,906 INFO L226 Difference]: Without dead ends: 376062 [2022-12-14 16:03:06,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:03:06,139 INFO L413 NwaCegarLoop]: 3253 mSDtfsCounter, 52 mSDsluCounter, 3226 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 6479 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:06,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 6479 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 16:03:06,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376062 states. [2022-12-14 16:03:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376062 to 352830. [2022-12-14 16:03:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352830 states, 309353 states have (on average 1.4443790750372552) internal successors, (446823), 309932 states have internal predecessors, (446823), 27357 states have call successors, (27357), 16118 states have call predecessors, (27357), 16118 states have return successors, (27357), 26780 states have call predecessors, (27357), 27357 states have call successors, (27357) [2022-12-14 16:03:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352830 states to 352830 states and 501537 transitions. [2022-12-14 16:03:25,767 INFO L78 Accepts]: Start accepts. Automaton has 352830 states and 501537 transitions. Word has length 174 [2022-12-14 16:03:25,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:03:25,767 INFO L495 AbstractCegarLoop]: Abstraction has 352830 states and 501537 transitions. [2022-12-14 16:03:25,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 16:03:25,768 INFO L276 IsEmpty]: Start isEmpty. Operand 352830 states and 501537 transitions. [2022-12-14 16:03:26,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 16:03:26,541 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:03:26,541 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:03:26,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 16:03:26,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:26,743 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:03:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:03:26,744 INFO L85 PathProgramCache]: Analyzing trace with hash 457285911, now seen corresponding path program 1 times [2022-12-14 16:03:26,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:03:26,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134413560] [2022-12-14 16:03:26,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:26,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:03:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 16:03:26,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:03:26,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134413560] [2022-12-14 16:03:26,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134413560] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:03:26,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31239757] [2022-12-14 16:03:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:03:26,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:03:26,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:03:26,943 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:03:26,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 16:03:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:03:27,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 16:03:27,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:03:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 16:03:27,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:03:27,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31239757] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:03:27,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:03:27,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 16:03:27,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939231399] [2022-12-14 16:03:27,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:03:27,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:03:27,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:03:27,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:03:27,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:03:27,145 INFO L87 Difference]: Start difference. First operand 352830 states and 501537 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:03:56,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:03:56,973 INFO L93 Difference]: Finished difference Result 870278 states and 1234119 transitions. [2022-12-14 16:03:56,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:03:56,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 174 [2022-12-14 16:03:56,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:03:58,506 INFO L225 Difference]: With dead ends: 870278 [2022-12-14 16:03:58,506 INFO L226 Difference]: Without dead ends: 519152 [2022-12-14 16:03:58,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 16:03:58,950 INFO L413 NwaCegarLoop]: 3234 mSDtfsCounter, 7201 mSDsluCounter, 6337 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7218 SdHoareTripleChecker+Valid, 9571 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 16:03:58,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7218 Valid, 9571 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 16:03:59,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519152 states. [2022-12-14 16:04:28,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519152 to 519150. [2022-12-14 16:04:28,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519150 states, 454393 states have (on average 1.4295092574049335) internal successors, (649559), 455260 states have internal predecessors, (649559), 40589 states have call successors, (40589), 24166 states have call predecessors, (40589), 24166 states have return successors, (40589), 39724 states have call predecessors, (40589), 40589 states have call successors, (40589) [2022-12-14 16:04:30,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519150 states to 519150 states and 730737 transitions. [2022-12-14 16:04:30,370 INFO L78 Accepts]: Start accepts. Automaton has 519150 states and 730737 transitions. Word has length 174 [2022-12-14 16:04:30,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:04:30,370 INFO L495 AbstractCegarLoop]: Abstraction has 519150 states and 730737 transitions. [2022-12-14 16:04:30,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:04:30,371 INFO L276 IsEmpty]: Start isEmpty. Operand 519150 states and 730737 transitions. [2022-12-14 16:04:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-12-14 16:04:31,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:04:31,205 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:04:31,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 16:04:31,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 16:04:31,406 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:04:31,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:04:31,408 INFO L85 PathProgramCache]: Analyzing trace with hash 860598092, now seen corresponding path program 1 times [2022-12-14 16:04:31,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:04:31,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103898188] [2022-12-14 16:04:31,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:04:31,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:04:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:04:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 14 proven. 57 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 16:04:31,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:04:31,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103898188] [2022-12-14 16:04:31,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103898188] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:04:31,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977627488] [2022-12-14 16:04:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:04:31,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:04:31,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:04:31,809 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:04:31,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 16:04:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:04:31,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 16:04:31,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:04:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 16:04:31,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:04:31,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977627488] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:04:31,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:04:31,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 16:04:31,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502334364] [2022-12-14 16:04:31,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:04:31,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 16:04:31,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:04:31,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 16:04:31,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:04:31,942 INFO L87 Difference]: Start difference. First operand 519150 states and 730737 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 16:05:09,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:05:09,706 INFO L93 Difference]: Finished difference Result 1006530 states and 1427043 transitions. [2022-12-14 16:05:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 16:05:09,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 172 [2022-12-14 16:05:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:05:11,522 INFO L225 Difference]: With dead ends: 1006530 [2022-12-14 16:05:11,523 INFO L226 Difference]: Without dead ends: 661744 [2022-12-14 16:05:12,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 16:05:12,224 INFO L413 NwaCegarLoop]: 3358 mSDtfsCounter, 130 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 6596 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 16:05:12,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 6596 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 16:05:12,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661744 states. [2022-12-14 16:05:47,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661744 to 603390. [2022-12-14 16:05:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603390 states, 533449 states have (on average 1.4533179366724842) internal successors, (775271), 534316 states have internal predecessors, (775271), 43181 states have call successors, (43181), 26758 states have call predecessors, (43181), 26758 states have return successors, (43181), 42316 states have call predecessors, (43181), 43181 states have call successors, (43181) [2022-12-14 16:05:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603390 states to 603390 states and 861633 transitions. [2022-12-14 16:05:49,408 INFO L78 Accepts]: Start accepts. Automaton has 603390 states and 861633 transitions. Word has length 172 [2022-12-14 16:05:49,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:05:49,409 INFO L495 AbstractCegarLoop]: Abstraction has 603390 states and 861633 transitions. [2022-12-14 16:05:49,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 16:05:49,409 INFO L276 IsEmpty]: Start isEmpty. Operand 603390 states and 861633 transitions. [2022-12-14 16:05:50,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-14 16:05:50,458 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 16:05:50,458 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 16:05:50,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 16:05:50,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 16:05:50,661 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 16:05:50,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 16:05:50,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1468446375, now seen corresponding path program 1 times [2022-12-14 16:05:50,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 16:05:50,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656467676] [2022-12-14 16:05:50,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:05:50,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 16:05:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:05:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 16:05:50,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 16:05:50,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656467676] [2022-12-14 16:05:50,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656467676] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 16:05:50,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480138964] [2022-12-14 16:05:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 16:05:50,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 16:05:50,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 16:05:50,842 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 16:05:50,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b7e069f-3ca3-4412-aadd-025555e160f7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 16:05:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 16:05:50,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 16:05:50,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 16:05:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 16:05:51,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 16:05:51,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480138964] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 16:05:51,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 16:05:51,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 16:05:51,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136279899] [2022-12-14 16:05:51,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 16:05:51,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 16:05:51,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 16:05:51,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 16:05:51,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 16:05:51,030 INFO L87 Difference]: Start difference. First operand 603390 states and 861633 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:06:45,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 16:06:45,157 INFO L93 Difference]: Finished difference Result 1440566 states and 2049303 transitions. [2022-12-14 16:06:45,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 16:06:45,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 174 [2022-12-14 16:06:45,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 16:06:47,754 INFO L225 Difference]: With dead ends: 1440566 [2022-12-14 16:06:47,754 INFO L226 Difference]: Without dead ends: 838880 [2022-12-14 16:06:48,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 16:06:48,676 INFO L413 NwaCegarLoop]: 3232 mSDtfsCounter, 7197 mSDsluCounter, 6332 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7214 SdHoareTripleChecker+Valid, 9564 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 16:06:48,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7214 Valid, 9564 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 16:06:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838880 states. [2022-12-14 16:07:43,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838880 to 838878. [2022-12-14 16:07:44,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838878 states, 738113 states have (on average 1.4352152041760544) internal successors, (1059351), 739412 states have internal predecessors, (1059351), 62373 states have call successors, (62373), 38390 states have call predecessors, (62373), 38390 states have return successors, (62373), 61076 states have call predecessors, (62373), 62373 states have call successors, (62373) [2022-12-14 16:07:47,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838878 states to 838878 states and 1184097 transitions. [2022-12-14 16:07:47,147 INFO L78 Accepts]: Start accepts. Automaton has 838878 states and 1184097 transitions. Word has length 174 [2022-12-14 16:07:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 16:07:47,147 INFO L495 AbstractCegarLoop]: Abstraction has 838878 states and 1184097 transitions. [2022-12-14 16:07:47,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 16:07:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 838878 states and 1184097 transitions.