./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.12.cil-2.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_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/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_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/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_db76af78-5751-4e5c-b488-75455209ccda/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 02a5384e72a6893ea777db3cb5d438cb5a46ff3cad82e91f14686b217f61c414 --- 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 06:37:33,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:37:33,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:37:33,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:37:33,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:37:33,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:37:33,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:37:33,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:37:33,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:37:33,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:37:33,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:37:33,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:37:33,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:37:33,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:37:33,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:37:33,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:37:33,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:37:33,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:37:33,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:37:33,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:37:33,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:37:33,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:37:33,325 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:37:33,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:37:33,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:37:33,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:37:33,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:37:33,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:37:33,331 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:37:33,332 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:37:33,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:37:33,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:37:33,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:37:33,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:37:33,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:37:33,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:37:33,336 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:37:33,337 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:37:33,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:37:33,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:37:33,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:37:33,339 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:37:33,356 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:37:33,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:37:33,357 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:37:33,357 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:37:33,357 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:37:33,357 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:37:33,357 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:37:33,357 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:37:33,358 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:37:33,358 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:37:33,362 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:37:33,362 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:37:33,363 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:37:33,363 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:37:33,363 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:37:33,363 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:37:33,363 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:37:33,364 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:37:33,364 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:37:33,365 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:37:33,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:37:33,365 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:37:33,365 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:37:33,365 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:37:33,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:37:33,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:37:33,366 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:37:33,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:37:33,366 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:37:33,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:37:33,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:37:33,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:37:33,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:37:33,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:37:33,368 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:37:33,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:37:33,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:37:33,368 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:37:33,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:37:33,368 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:37:33,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:37:33,369 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_db76af78-5751-4e5c-b488-75455209ccda/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02a5384e72a6893ea777db3cb5d438cb5a46ff3cad82e91f14686b217f61c414 [2022-12-14 06:37:33,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:37:33,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:37:33,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:37:33,587 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:37:33,588 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:37:33,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.12.cil-2.c [2022-12-14 06:37:36,254 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:37:36,749 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:37:36,750 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/sv-benchmarks/c/combinations/Problem05_label49+token_ring.12.cil-2.c [2022-12-14 06:37:36,777 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/data/57ed2e42b/22b981e85b374d10b0d8cdea4b004113/FLAGf515a7fa3 [2022-12-14 06:37:36,787 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/data/57ed2e42b/22b981e85b374d10b0d8cdea4b004113 [2022-12-14 06:37:36,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:37:36,790 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:37:36,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:37:36,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:37:36,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:37:36,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:37:36" (1/1) ... [2022-12-14 06:37:36,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a3dbaf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:37:36, skipping insertion in model container [2022-12-14 06:37:36,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:37:36" (1/1) ... [2022-12-14 06:37:36,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:37:36,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:37:38,431 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_db76af78-5751-4e5c-b488-75455209ccda/sv-benchmarks/c/combinations/Problem05_label49+token_ring.12.cil-2.c[380593,380606] [2022-12-14 06:37:38,450 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_db76af78-5751-4e5c-b488-75455209ccda/sv-benchmarks/c/combinations/Problem05_label49+token_ring.12.cil-2.c[383339,383352] [2022-12-14 06:37:38,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:37:38,701 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:37:39,497 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_db76af78-5751-4e5c-b488-75455209ccda/sv-benchmarks/c/combinations/Problem05_label49+token_ring.12.cil-2.c[380593,380606] [2022-12-14 06:37:39,500 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_db76af78-5751-4e5c-b488-75455209ccda/sv-benchmarks/c/combinations/Problem05_label49+token_ring.12.cil-2.c[383339,383352] [2022-12-14 06:37:39,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:37:39,552 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:37:39,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:37:39 WrapperNode [2022-12-14 06:37:39,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:37:39,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:37:39,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:37:39,553 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:37:39,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:37:39" (1/1) ... [2022-12-14 06:37:39,615 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:37:39" (1/1) ... [2022-12-14 06:37:39,908 INFO L138 Inliner]: procedures = 68, calls = 77, calls flagged for inlining = 46, calls inlined = 46, statements flattened = 13199 [2022-12-14 06:37:39,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:37:39,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:37:39,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:37:39,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:37:39,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:37:39" (1/1) ... [2022-12-14 06:37:39,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:37:39" (1/1) ... [2022-12-14 06:37:39,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:37:39" (1/1) ... [2022-12-14 06:37:39,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:37:39" (1/1) ... [2022-12-14 06:37:40,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:37:39" (1/1) ... [2022-12-14 06:37:40,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:37:39" (1/1) ... [2022-12-14 06:37:40,154 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:37:39" (1/1) ... [2022-12-14 06:37:40,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:37:39" (1/1) ... [2022-12-14 06:37:40,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:37:40,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:37:40,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:37:40,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:37:40,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:37:39" (1/1) ... [2022-12-14 06:37:40,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:37:40,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:37:40,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:37:40,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:37:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:37:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 06:37:40,287 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 06:37:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 06:37:40,287 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 06:37:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 06:37:40,288 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 06:37:40,288 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 06:37:40,288 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 06:37:40,288 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 06:37:40,288 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 06:37:40,288 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 06:37:40,288 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 06:37:40,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:37:40,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:37:40,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:37:40,404 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:37:40,406 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:37:46,055 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:37:47,815 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:37:47,815 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-12-14 06:37:47,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:37:47 BoogieIcfgContainer [2022-12-14 06:37:47,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:37:47,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:37:47,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:37:47,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:37:47,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:37:36" (1/3) ... [2022-12-14 06:37:47,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c613c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:37:47, skipping insertion in model container [2022-12-14 06:37:47,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:37:39" (2/3) ... [2022-12-14 06:37:47,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c613c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:37:47, skipping insertion in model container [2022-12-14 06:37:47,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:37:47" (3/3) ... [2022-12-14 06:37:47,825 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.12.cil-2.c [2022-12-14 06:37:47,842 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:37:47,842 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 06:37:47,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:37:47,907 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;@2f4f8015, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:37:47,907 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 06:37:47,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 1831 states, 1796 states have (on average 1.9560133630289531) internal successors, (3513), 1799 states have internal predecessors, (3513), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-12-14 06:37:47,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 06:37:47,924 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:47,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:37:47,924 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:47,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:47,928 INFO L85 PathProgramCache]: Analyzing trace with hash -2010926690, now seen corresponding path program 1 times [2022-12-14 06:37:47,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:47,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269752608] [2022-12-14 06:37:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:47,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:48,229 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 06:37:48,229 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:48,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269752608] [2022-12-14 06:37:48,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269752608] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:48,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:37:48,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:37:48,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184260039] [2022-12-14 06:37:48,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:48,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:37:48,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:48,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:37:48,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:37:48,273 INFO L87 Difference]: Start difference. First operand has 1831 states, 1796 states have (on average 1.9560133630289531) internal successors, (3513), 1799 states have internal predecessors, (3513), 26 states have call successors, (26), 6 states have call predecessors, (26), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 06:37:49,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:49,078 INFO L93 Difference]: Finished difference Result 3833 states and 7427 transitions. [2022-12-14 06:37:49,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:37:49,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 67 [2022-12-14 06:37:49,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:49,102 INFO L225 Difference]: With dead ends: 3833 [2022-12-14 06:37:49,102 INFO L226 Difference]: Without dead ends: 2001 [2022-12-14 06:37:49,110 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 06:37:49,113 INFO L413 NwaCegarLoop]: 3511 mSDtfsCounter, 3779 mSDsluCounter, 3413 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3779 SdHoareTripleChecker+Valid, 6924 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:49,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3779 Valid, 6924 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:37:49,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2022-12-14 06:37:49,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 2000. [2022-12-14 06:37:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1938 states have (on average 1.9195046439628483) internal successors, (3720), 1941 states have internal predecessors, (3720), 48 states have call successors, (48), 12 states have call predecessors, (48), 12 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2022-12-14 06:37:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 3816 transitions. [2022-12-14 06:37:49,236 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 3816 transitions. Word has length 67 [2022-12-14 06:37:49,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:49,237 INFO L495 AbstractCegarLoop]: Abstraction has 2000 states and 3816 transitions. [2022-12-14 06:37:49,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 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 06:37:49,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 3816 transitions. [2022-12-14 06:37:49,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 06:37:49,244 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:49,244 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, 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] [2022-12-14 06:37:49,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:37:49,244 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:49,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:49,245 INFO L85 PathProgramCache]: Analyzing trace with hash 825702329, now seen corresponding path program 1 times [2022-12-14 06:37:49,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:49,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459694544] [2022-12-14 06:37:49,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:49,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:37:49,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:49,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459694544] [2022-12-14 06:37:49,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459694544] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:37:49,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264047617] [2022-12-14 06:37:49,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:49,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:49,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:37:49,514 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:37:49,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:37:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:49,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:37:49,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:37:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:37:49,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:37:49,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264047617] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:49,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:37:49,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:37:49,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553376049] [2022-12-14 06:37:49,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:49,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:37:49,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:49,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:37:49,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:37:49,796 INFO L87 Difference]: Start difference. First operand 2000 states and 3816 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 06:37:50,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:50,209 INFO L93 Difference]: Finished difference Result 2701 states and 4915 transitions. [2022-12-14 06:37:50,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:37:50,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 136 [2022-12-14 06:37:50,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:50,218 INFO L225 Difference]: With dead ends: 2701 [2022-12-14 06:37:50,219 INFO L226 Difference]: Without dead ends: 2347 [2022-12-14 06:37:50,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 06:37:50,222 INFO L413 NwaCegarLoop]: 3343 mSDtfsCounter, 3507 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3507 SdHoareTripleChecker+Valid, 3568 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:50,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3507 Valid, 3568 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:37:50,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2022-12-14 06:37:50,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2343. [2022-12-14 06:37:50,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2227 states have (on average 1.8666367310282892) internal successors, (4157), 2231 states have internal predecessors, (4157), 90 states have call successors, (90), 24 states have call predecessors, (90), 24 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-12-14 06:37:50,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 4337 transitions. [2022-12-14 06:37:50,280 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 4337 transitions. Word has length 136 [2022-12-14 06:37:50,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:50,280 INFO L495 AbstractCegarLoop]: Abstraction has 2343 states and 4337 transitions. [2022-12-14 06:37:50,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 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 06:37:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 4337 transitions. [2022-12-14 06:37:50,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 06:37:50,285 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:50,285 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, 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] [2022-12-14 06:37:50,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:37:50,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:50,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:50,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:50,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1528670503, now seen corresponding path program 1 times [2022-12-14 06:37:50,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:50,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238203184] [2022-12-14 06:37:50,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:50,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:50,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:37:50,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:50,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238203184] [2022-12-14 06:37:50,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238203184] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:37:50,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526483811] [2022-12-14 06:37:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:50,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:50,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:37:50,661 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:37:50,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:37:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:50,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 1044 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:37:50,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:37:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 06:37:50,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:37:50,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526483811] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:50,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:37:50,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:37:50,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554092504] [2022-12-14 06:37:50,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:50,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:37:50,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:50,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:37:50,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:37:50,897 INFO L87 Difference]: Start difference. First operand 2343 states and 4337 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 06:37:51,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:51,353 INFO L93 Difference]: Finished difference Result 3724 states and 6496 transitions. [2022-12-14 06:37:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:37:51,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 136 [2022-12-14 06:37:51,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:51,363 INFO L225 Difference]: With dead ends: 3724 [2022-12-14 06:37:51,363 INFO L226 Difference]: Without dead ends: 3027 [2022-12-14 06:37:51,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 06:37:51,367 INFO L413 NwaCegarLoop]: 3342 mSDtfsCounter, 3519 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 3567 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:51,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3519 Valid, 3567 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:37:51,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3027 states. [2022-12-14 06:37:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3027 to 3021. [2022-12-14 06:37:51,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3021 states, 2799 states have (on average 1.7931404072883173) internal successors, (5019), 2805 states have internal predecessors, (5019), 172 states have call successors, (172), 48 states have call predecessors, (172), 48 states have return successors, (172), 168 states have call predecessors, (172), 172 states have call successors, (172) [2022-12-14 06:37:51,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 5363 transitions. [2022-12-14 06:37:51,443 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 5363 transitions. Word has length 136 [2022-12-14 06:37:51,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:51,444 INFO L495 AbstractCegarLoop]: Abstraction has 3021 states and 5363 transitions. [2022-12-14 06:37:51,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 06:37:51,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 5363 transitions. [2022-12-14 06:37:51,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 06:37:51,447 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:51,447 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, 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] [2022-12-14 06:37:51,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:37:51,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 06:37:51,648 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:51,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:51,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1640512007, now seen corresponding path program 1 times [2022-12-14 06:37:51,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:51,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313759621] [2022-12-14 06:37:51,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:51,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:37:51,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:51,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313759621] [2022-12-14 06:37:51,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313759621] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:37:51,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792532317] [2022-12-14 06:37:51,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:51,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:51,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:37:51,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:37:51,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:37:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:51,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:37:51,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:37:51,993 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 06:37:51,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:37:51,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792532317] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:51,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:37:51,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:37:51,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781885550] [2022-12-14 06:37:51,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:51,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:37:51,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:51,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:37:51,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:37:51,995 INFO L87 Difference]: Start difference. First operand 3021 states and 5363 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 06:37:52,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:52,459 INFO L93 Difference]: Finished difference Result 5746 states and 9608 transitions. [2022-12-14 06:37:52,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:37:52,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 136 [2022-12-14 06:37:52,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:52,475 INFO L225 Difference]: With dead ends: 5746 [2022-12-14 06:37:52,475 INFO L226 Difference]: Without dead ends: 4371 [2022-12-14 06:37:52,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 06:37:52,481 INFO L413 NwaCegarLoop]: 3341 mSDtfsCounter, 3525 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3525 SdHoareTripleChecker+Valid, 3566 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:52,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3525 Valid, 3566 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:37:52,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-12-14 06:37:52,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 4361. [2022-12-14 06:37:52,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4361 states, 3931 states have (on average 1.709234291528873) internal successors, (6719), 3941 states have internal predecessors, (6719), 332 states have call successors, (332), 96 states have call predecessors, (332), 96 states have return successors, (332), 324 states have call predecessors, (332), 332 states have call successors, (332) [2022-12-14 06:37:52,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4361 states to 4361 states and 7383 transitions. [2022-12-14 06:37:52,596 INFO L78 Accepts]: Start accepts. Automaton has 4361 states and 7383 transitions. Word has length 136 [2022-12-14 06:37:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:52,596 INFO L495 AbstractCegarLoop]: Abstraction has 4361 states and 7383 transitions. [2022-12-14 06:37:52,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 06:37:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 4361 states and 7383 transitions. [2022-12-14 06:37:52,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 06:37:52,601 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:52,601 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, 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] [2022-12-14 06:37:52,609 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:37:52,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:52,802 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:52,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:52,802 INFO L85 PathProgramCache]: Analyzing trace with hash -196780775, now seen corresponding path program 1 times [2022-12-14 06:37:52,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:52,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492226441] [2022-12-14 06:37:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:52,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:37:52,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:52,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492226441] [2022-12-14 06:37:52,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492226441] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:37:52,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696560533] [2022-12-14 06:37:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:52,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:52,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:37:52,917 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:37:52,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:37:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:53,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:37:53,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:37:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 06:37:53,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:37:53,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696560533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:53,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:37:53,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:37:53,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695390535] [2022-12-14 06:37:53,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:53,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:37:53,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:53,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:37:53,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:37:53,138 INFO L87 Difference]: Start difference. First operand 4361 states and 7383 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 06:37:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:53,681 INFO L93 Difference]: Finished difference Result 9742 states and 15732 transitions. [2022-12-14 06:37:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:37:53,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 136 [2022-12-14 06:37:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:53,719 INFO L225 Difference]: With dead ends: 9742 [2022-12-14 06:37:53,719 INFO L226 Difference]: Without dead ends: 7027 [2022-12-14 06:37:53,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 06:37:53,734 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3513 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3513 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:53,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3513 Valid, 3535 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:37:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7027 states. [2022-12-14 06:37:54,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7027 to 7009. [2022-12-14 06:37:54,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7009 states, 6171 states have (on average 1.631988332523092) internal successors, (10071), 6189 states have internal predecessors, (10071), 644 states have call successors, (644), 192 states have call predecessors, (644), 192 states have return successors, (644), 628 states have call predecessors, (644), 644 states have call successors, (644) [2022-12-14 06:37:54,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7009 states to 7009 states and 11359 transitions. [2022-12-14 06:37:54,072 INFO L78 Accepts]: Start accepts. Automaton has 7009 states and 11359 transitions. Word has length 136 [2022-12-14 06:37:54,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:54,073 INFO L495 AbstractCegarLoop]: Abstraction has 7009 states and 11359 transitions. [2022-12-14 06:37:54,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 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 06:37:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 7009 states and 11359 transitions. [2022-12-14 06:37:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 06:37:54,084 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:54,084 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, 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] [2022-12-14 06:37:54,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:37:54,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:54,284 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:54,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:54,285 INFO L85 PathProgramCache]: Analyzing trace with hash 967091257, now seen corresponding path program 1 times [2022-12-14 06:37:54,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:54,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401328372] [2022-12-14 06:37:54,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:54,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:37:54,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:54,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401328372] [2022-12-14 06:37:54,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401328372] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:37:54,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449121884] [2022-12-14 06:37:54,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:54,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:54,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:37:54,399 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:37:54,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:37:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:54,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:37:54,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:37:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 06:37:54,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:37:54,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449121884] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:54,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:37:54,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:37:54,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966259790] [2022-12-14 06:37:54,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:54,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:37:54,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:54,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:37:54,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:37:54,581 INFO L87 Difference]: Start difference. First operand 7009 states and 11359 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 06:37:55,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:55,102 INFO L93 Difference]: Finished difference Result 17638 states and 27780 transitions. [2022-12-14 06:37:55,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:37:55,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 136 [2022-12-14 06:37:55,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:55,137 INFO L225 Difference]: With dead ends: 17638 [2022-12-14 06:37:55,137 INFO L226 Difference]: Without dead ends: 12275 [2022-12-14 06:37:55,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 06:37:55,154 INFO L413 NwaCegarLoop]: 3339 mSDtfsCounter, 3528 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3528 SdHoareTripleChecker+Valid, 3564 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:55,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3528 Valid, 3564 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:37:55,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12275 states. [2022-12-14 06:37:55,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12275 to 12241. [2022-12-14 06:37:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12241 states, 10603 states have (on average 1.5730453645194755) internal successors, (16679), 10637 states have internal predecessors, (16679), 1252 states have call successors, (1252), 384 states have call predecessors, (1252), 384 states have return successors, (1252), 1220 states have call predecessors, (1252), 1252 states have call successors, (1252) [2022-12-14 06:37:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12241 states to 12241 states and 19183 transitions. [2022-12-14 06:37:55,492 INFO L78 Accepts]: Start accepts. Automaton has 12241 states and 19183 transitions. Word has length 136 [2022-12-14 06:37:55,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:55,492 INFO L495 AbstractCegarLoop]: Abstraction has 12241 states and 19183 transitions. [2022-12-14 06:37:55,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 06:37:55,493 INFO L276 IsEmpty]: Start isEmpty. Operand 12241 states and 19183 transitions. [2022-12-14 06:37:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 06:37:55,509 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:55,509 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, 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] [2022-12-14 06:37:55,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 06:37:55,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:55,710 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:55,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:55,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1361721625, now seen corresponding path program 1 times [2022-12-14 06:37:55,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:55,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864074238] [2022-12-14 06:37:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:55,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:37:55,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:55,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864074238] [2022-12-14 06:37:55,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864074238] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:37:55,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900865218] [2022-12-14 06:37:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:55,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:55,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:37:55,809 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:37:55,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:37:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:55,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:37:55,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:37:56,032 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:37:56,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:37:56,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900865218] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:56,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:37:56,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:37:56,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408353364] [2022-12-14 06:37:56,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:56,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:37:56,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:56,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:37:56,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:37:56,034 INFO L87 Difference]: Start difference. First operand 12241 states and 19183 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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 06:37:56,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:56,894 INFO L93 Difference]: Finished difference Result 33238 states and 51476 transitions. [2022-12-14 06:37:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:37:56,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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 136 [2022-12-14 06:37:56,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:56,983 INFO L225 Difference]: With dead ends: 33238 [2022-12-14 06:37:56,983 INFO L226 Difference]: Without dead ends: 22643 [2022-12-14 06:37:56,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 06:37:57,000 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3498 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3498 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:57,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3498 Valid, 3535 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:37:57,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22643 states. [2022-12-14 06:37:57,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22643 to 22577. [2022-12-14 06:37:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22577 states, 19371 states have (on average 1.533374632182128) internal successors, (29703), 19437 states have internal predecessors, (29703), 2436 states have call successors, (2436), 768 states have call predecessors, (2436), 768 states have return successors, (2436), 2372 states have call predecessors, (2436), 2436 states have call successors, (2436) [2022-12-14 06:37:57,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22577 states to 22577 states and 34575 transitions. [2022-12-14 06:37:57,536 INFO L78 Accepts]: Start accepts. Automaton has 22577 states and 34575 transitions. Word has length 136 [2022-12-14 06:37:57,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:37:57,536 INFO L495 AbstractCegarLoop]: Abstraction has 22577 states and 34575 transitions. [2022-12-14 06:37:57,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 2 states have internal predecessors, (112), 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 06:37:57,537 INFO L276 IsEmpty]: Start isEmpty. Operand 22577 states and 34575 transitions. [2022-12-14 06:37:57,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 06:37:57,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:37:57,558 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, 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] [2022-12-14 06:37:57,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:37:57,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:57,758 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:37:57,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:37:57,759 INFO L85 PathProgramCache]: Analyzing trace with hash 894014969, now seen corresponding path program 1 times [2022-12-14 06:37:57,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:37:57,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488208057] [2022-12-14 06:37:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:57,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:37:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:57,849 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:37:57,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:37:57,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488208057] [2022-12-14 06:37:57,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488208057] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:37:57,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554195630] [2022-12-14 06:37:57,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:37:57,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:37:57,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:37:57,850 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:37:57,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:37:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:37:58,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 1014 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:37:58,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:37:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 06:37:58,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:37:58,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554195630] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:37:58,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:37:58,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 06:37:58,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899945425] [2022-12-14 06:37:58,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:37:58,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:37:58,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:37:58,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:37:58,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:37:58,070 INFO L87 Difference]: Start difference. First operand 22577 states and 34575 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 06:37:59,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:37:59,385 INFO L93 Difference]: Finished difference Result 64054 states and 98068 transitions. [2022-12-14 06:37:59,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:37:59,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 136 [2022-12-14 06:37:59,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:37:59,506 INFO L225 Difference]: With dead ends: 64054 [2022-12-14 06:37:59,507 INFO L226 Difference]: Without dead ends: 43123 [2022-12-14 06:37:59,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 136 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 06:37:59,561 INFO L413 NwaCegarLoop]: 3310 mSDtfsCounter, 3501 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3501 SdHoareTripleChecker+Valid, 3535 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:37:59,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3501 Valid, 3535 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:37:59,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43123 states. [2022-12-14 06:38:00,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43123 to 42993. [2022-12-14 06:38:00,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42993 states, 36715 states have (on average 1.5080212447228654) internal successors, (55367), 36845 states have internal predecessors, (55367), 4740 states have call successors, (4740), 1536 states have call predecessors, (4740), 1536 states have return successors, (4740), 4612 states have call predecessors, (4740), 4740 states have call successors, (4740) [2022-12-14 06:38:00,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42993 states to 42993 states and 64847 transitions. [2022-12-14 06:38:00,707 INFO L78 Accepts]: Start accepts. Automaton has 42993 states and 64847 transitions. Word has length 136 [2022-12-14 06:38:00,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:38:00,707 INFO L495 AbstractCegarLoop]: Abstraction has 42993 states and 64847 transitions. [2022-12-14 06:38:00,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 06:38:00,707 INFO L276 IsEmpty]: Start isEmpty. Operand 42993 states and 64847 transitions. [2022-12-14 06:38:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 06:38:00,742 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:38:00,742 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, 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] [2022-12-14 06:38:00,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-14 06:38:00,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db76af78-5751-4e5c-b488-75455209ccda/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 06:38:00,943 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:38:00,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:38:00,943 INFO L85 PathProgramCache]: Analyzing trace with hash 318934297, now seen corresponding path program 1 times [2022-12-14 06:38:00,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:38:00,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663615051] [2022-12-14 06:38:00,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:38:00,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:38:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:38:01,337 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 06:38:01,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:38:01,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663615051] [2022-12-14 06:38:01,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663615051] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:38:01,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:38:01,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:38:01,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432492477] [2022-12-14 06:38:01,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:38:01,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:38:01,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:38:01,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:38:01,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:38:01,340 INFO L87 Difference]: Start difference. First operand 42993 states and 64847 transitions. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:38:05,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:38:05,061 INFO L93 Difference]: Finished difference Result 146421 states and 218578 transitions. [2022-12-14 06:38:05,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:38:05,062 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 136 [2022-12-14 06:38:05,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:38:05,422 INFO L225 Difference]: With dead ends: 146421 [2022-12-14 06:38:05,422 INFO L226 Difference]: Without dead ends: 105075 [2022-12-14 06:38:05,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:38:05,490 INFO L413 NwaCegarLoop]: 3312 mSDtfsCounter, 4331 mSDsluCounter, 9754 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4352 SdHoareTripleChecker+Valid, 13066 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:38:05,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4352 Valid, 13066 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 06:38:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105075 states. [2022-12-14 06:38:08,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105075 to 82801. [2022-12-14 06:38:08,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82801 states, 70507 states have (on average 1.4914689321627639) internal successors, (105159), 70765 states have internal predecessors, (105159), 9220 states have call successors, (9220), 3072 states have call predecessors, (9220), 3072 states have return successors, (9220), 8964 states have call predecessors, (9220), 9220 states have call successors, (9220) [2022-12-14 06:38:08,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82801 states to 82801 states and 123599 transitions. [2022-12-14 06:38:08,643 INFO L78 Accepts]: Start accepts. Automaton has 82801 states and 123599 transitions. Word has length 136 [2022-12-14 06:38:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:38:08,643 INFO L495 AbstractCegarLoop]: Abstraction has 82801 states and 123599 transitions. [2022-12-14 06:38:08,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:38:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 82801 states and 123599 transitions. [2022-12-14 06:38:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 06:38:08,705 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:38:08,705 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, 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 06:38:08,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 06:38:08,706 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:38:08,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:38:08,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1915697176, now seen corresponding path program 1 times [2022-12-14 06:38:08,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:38:08,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884950574] [2022-12-14 06:38:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:38:08,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:38:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:38:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 06:38:09,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:38:09,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884950574] [2022-12-14 06:38:09,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884950574] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:38:09,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:38:09,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:38:09,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114765200] [2022-12-14 06:38:09,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:38:09,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:38:09,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:38:09,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:38:09,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:38:09,351 INFO L87 Difference]: Start difference. First operand 82801 states and 123599 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:38:16,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:38:16,195 INFO L93 Difference]: Finished difference Result 222197 states and 331089 transitions. [2022-12-14 06:38:16,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:38:16,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 137 [2022-12-14 06:38:16,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:38:16,632 INFO L225 Difference]: With dead ends: 222197 [2022-12-14 06:38:16,632 INFO L226 Difference]: Without dead ends: 141043 [2022-12-14 06:38:16,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:38:16,769 INFO L413 NwaCegarLoop]: 3304 mSDtfsCounter, 4183 mSDsluCounter, 9846 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4189 SdHoareTripleChecker+Valid, 13150 SdHoareTripleChecker+Invalid, 1388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:38:16,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4189 Valid, 13150 Invalid, 1388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 06:38:16,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141043 states. [2022-12-14 06:38:21,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141043 to 122353. [2022-12-14 06:38:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122353 states, 104043 states have (on average 1.4831463913958651) internal successors, (154311), 104429 states have internal predecessors, (154311), 13700 states have call successors, (13700), 4608 states have call predecessors, (13700), 4608 states have return successors, (13700), 13316 states have call predecessors, (13700), 13700 states have call successors, (13700) [2022-12-14 06:38:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122353 states to 122353 states and 181711 transitions. [2022-12-14 06:38:22,086 INFO L78 Accepts]: Start accepts. Automaton has 122353 states and 181711 transitions. Word has length 137 [2022-12-14 06:38:22,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:38:22,087 INFO L495 AbstractCegarLoop]: Abstraction has 122353 states and 181711 transitions. [2022-12-14 06:38:22,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:38:22,087 INFO L276 IsEmpty]: Start isEmpty. Operand 122353 states and 181711 transitions. [2022-12-14 06:38:22,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-14 06:38:22,176 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:38:22,176 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, 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 06:38:22,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 06:38:22,176 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:38:22,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:38:22,177 INFO L85 PathProgramCache]: Analyzing trace with hash -311384199, now seen corresponding path program 1 times [2022-12-14 06:38:22,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:38:22,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045334319] [2022-12-14 06:38:22,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:38:22,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:38:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:38:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 06:38:22,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:38:22,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045334319] [2022-12-14 06:38:22,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045334319] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:38:22,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:38:22,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:38:22,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888389337] [2022-12-14 06:38:22,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:38:22,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:38:22,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:38:22,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:38:22,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:38:22,767 INFO L87 Difference]: Start difference. First operand 122353 states and 181711 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:38:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:38:35,928 INFO L93 Difference]: Finished difference Result 409077 states and 606802 transitions. [2022-12-14 06:38:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:38:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 138 [2022-12-14 06:38:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:38:37,056 INFO L225 Difference]: With dead ends: 409077 [2022-12-14 06:38:37,056 INFO L226 Difference]: Without dead ends: 288371 [2022-12-14 06:38:37,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:38:37,314 INFO L413 NwaCegarLoop]: 3294 mSDtfsCounter, 4257 mSDsluCounter, 9713 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4278 SdHoareTripleChecker+Valid, 13007 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:38:37,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4278 Valid, 13007 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 06:38:37,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288371 states. [2022-12-14 06:38:48,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288371 to 238449. [2022-12-14 06:38:48,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238449 states, 202603 states have (on average 1.473023597873674) internal successors, (298439), 203373 states have internal predecessors, (298439), 26628 states have call successors, (26628), 9216 states have call predecessors, (26628), 9216 states have return successors, (26628), 25860 states have call predecessors, (26628), 26628 states have call successors, (26628) [2022-12-14 06:38:49,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238449 states to 238449 states and 351695 transitions. [2022-12-14 06:38:49,884 INFO L78 Accepts]: Start accepts. Automaton has 238449 states and 351695 transitions. Word has length 138 [2022-12-14 06:38:49,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:38:49,884 INFO L495 AbstractCegarLoop]: Abstraction has 238449 states and 351695 transitions. [2022-12-14 06:38:49,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:38:49,885 INFO L276 IsEmpty]: Start isEmpty. Operand 238449 states and 351695 transitions. [2022-12-14 06:38:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-12-14 06:38:50,136 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:38:50,137 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, 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 06:38:50,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 06:38:50,137 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:38:50,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:38:50,137 INFO L85 PathProgramCache]: Analyzing trace with hash 218542980, now seen corresponding path program 1 times [2022-12-14 06:38:50,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:38:50,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750930052] [2022-12-14 06:38:50,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:38:50,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:38:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:38:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 06:38:50,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:38:50,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750930052] [2022-12-14 06:38:50,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750930052] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:38:50,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:38:50,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:38:50,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263073708] [2022-12-14 06:38:50,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:38:50,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:38:50,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:38:50,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:38:50,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:38:50,480 INFO L87 Difference]: Start difference. First operand 238449 states and 351695 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:39:11,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:39:11,928 INFO L93 Difference]: Finished difference Result 635125 states and 938705 transitions. [2022-12-14 06:39:11,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:39:11,929 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 139 [2022-12-14 06:39:11,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:39:13,507 INFO L225 Difference]: With dead ends: 635125 [2022-12-14 06:39:13,507 INFO L226 Difference]: Without dead ends: 398323 [2022-12-14 06:39:14,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:39:14,012 INFO L413 NwaCegarLoop]: 3304 mSDtfsCounter, 4191 mSDsluCounter, 6596 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4197 SdHoareTripleChecker+Valid, 9900 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:39:14,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4197 Valid, 9900 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:39:14,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398323 states. [2022-12-14 06:39:32,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398323 to 353777. [2022-12-14 06:39:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353777 states, 300395 states have (on average 1.4668919256312523) internal successors, (440647), 301549 states have internal predecessors, (440647), 39556 states have call successors, (39556), 13824 states have call predecessors, (39556), 13824 states have return successors, (39556), 38404 states have call predecessors, (39556), 39556 states have call successors, (39556) [2022-12-14 06:39:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353777 states to 353777 states and 519759 transitions. [2022-12-14 06:39:34,169 INFO L78 Accepts]: Start accepts. Automaton has 353777 states and 519759 transitions. Word has length 139 [2022-12-14 06:39:34,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:39:34,170 INFO L495 AbstractCegarLoop]: Abstraction has 353777 states and 519759 transitions. [2022-12-14 06:39:34,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:39:34,170 INFO L276 IsEmpty]: Start isEmpty. Operand 353777 states and 519759 transitions. [2022-12-14 06:39:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-12-14 06:39:34,488 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:39:34,488 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, 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 06:39:34,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 06:39:34,489 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:39:34,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:39:34,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2035617757, now seen corresponding path program 1 times [2022-12-14 06:39:34,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:39:34,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790991407] [2022-12-14 06:39:34,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:39:34,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:39:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:39:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 06:39:34,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:39:34,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790991407] [2022-12-14 06:39:34,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790991407] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:39:34,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:39:34,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:39:34,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396533437] [2022-12-14 06:39:34,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:39:34,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:39:34,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:39:34,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:39:34,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:39:34,945 INFO L87 Difference]: Start difference. First operand 353777 states and 519759 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:40:21,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:40:21,884 INFO L93 Difference]: Finished difference Result 1159413 states and 1707474 transitions. [2022-12-14 06:40:21,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:40:21,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 140 [2022-12-14 06:40:21,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:40:25,127 INFO L225 Difference]: With dead ends: 1159413 [2022-12-14 06:40:25,127 INFO L226 Difference]: Without dead ends: 807283 [2022-12-14 06:40:25,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:40:25,929 INFO L413 NwaCegarLoop]: 3290 mSDtfsCounter, 4242 mSDsluCounter, 6527 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4263 SdHoareTripleChecker+Valid, 9817 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:40:25,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4263 Valid, 9817 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 06:40:26,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807283 states. [2022-12-14 06:41:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807283 to 692081. [2022-12-14 06:41:07,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692081 states, 587627 states have (on average 1.4588965449170987) internal successors, (857287), 589933 states have internal predecessors, (857287), 76804 states have call successors, (76804), 27648 states have call predecessors, (76804), 27648 states have return successors, (76804), 74500 states have call predecessors, (76804), 76804 states have call successors, (76804) [2022-12-14 06:41:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692081 states to 692081 states and 1010895 transitions. [2022-12-14 06:41:10,643 INFO L78 Accepts]: Start accepts. Automaton has 692081 states and 1010895 transitions. Word has length 140 [2022-12-14 06:41:10,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:41:10,644 INFO L495 AbstractCegarLoop]: Abstraction has 692081 states and 1010895 transitions. [2022-12-14 06:41:10,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:41:10,644 INFO L276 IsEmpty]: Start isEmpty. Operand 692081 states and 1010895 transitions. [2022-12-14 06:41:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 06:41:11,269 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:41:11,269 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, 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, 1] [2022-12-14 06:41:11,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 06:41:11,269 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:41:11,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:41:11,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1643407136, now seen corresponding path program 1 times [2022-12-14 06:41:11,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:41:11,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346042917] [2022-12-14 06:41:11,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:41:11,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:41:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:41:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 06:41:11,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:41:11,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346042917] [2022-12-14 06:41:11,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346042917] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:41:11,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:41:11,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:41:11,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375916286] [2022-12-14 06:41:11,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:41:11,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:41:11,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:41:11,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:41:11,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:41:11,715 INFO L87 Difference]: Start difference. First operand 692081 states and 1010895 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:42:25,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:42:25,889 INFO L93 Difference]: Finished difference Result 1817589 states and 2665553 transitions. [2022-12-14 06:42:25,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:42:25,890 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 141 [2022-12-14 06:42:25,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:42:30,829 INFO L225 Difference]: With dead ends: 1817589 [2022-12-14 06:42:30,829 INFO L226 Difference]: Without dead ends: 1127155 [2022-12-14 06:42:32,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:42:32,686 INFO L413 NwaCegarLoop]: 3304 mSDtfsCounter, 4145 mSDsluCounter, 6576 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4151 SdHoareTripleChecker+Valid, 9880 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:42:32,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4151 Valid, 9880 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 06:42:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127155 states. [2022-12-14 06:43:46,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127155 to 1028081. [2022-12-14 06:43:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028081 states, 872555 states have (on average 1.453394914933729) internal successors, (1268167), 876013 states have internal predecessors, (1268167), 114052 states have call successors, (114052), 41472 states have call predecessors, (114052), 41472 states have return successors, (114052), 110596 states have call predecessors, (114052), 114052 states have call successors, (114052) [2022-12-14 06:43:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028081 states to 1028081 states and 1496271 transitions. [2022-12-14 06:43:53,223 INFO L78 Accepts]: Start accepts. Automaton has 1028081 states and 1496271 transitions. Word has length 141 [2022-12-14 06:43:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:43:53,224 INFO L495 AbstractCegarLoop]: Abstraction has 1028081 states and 1496271 transitions. [2022-12-14 06:43:53,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:43:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1028081 states and 1496271 transitions. [2022-12-14 06:43:54,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 06:43:54,545 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:43:54,545 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, 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, 1, 1] [2022-12-14 06:43:54,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 06:43:54,545 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:43:54,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:43:54,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1094242369, now seen corresponding path program 1 times [2022-12-14 06:43:54,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:43:54,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171528902] [2022-12-14 06:43:54,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:43:54,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:43:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:43:54,831 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 06:43:54,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:43:54,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171528902] [2022-12-14 06:43:54,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171528902] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:43:54,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:43:54,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 06:43:54,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454443394] [2022-12-14 06:43:54,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:43:54,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 06:43:54,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:43:54,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 06:43:54,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:43:54,833 INFO L87 Difference]: Start difference. First operand 1028081 states and 1496271 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)