./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.06.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_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/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_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.06.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/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_fea31605-81a1-4fb5-bf1b-f4e882703f83/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 d6bcae8fdfc31b6b7d4775dfad537e0ca42e395c3a990a218ee828052c4f57f7 --- 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 14:09:36,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:09:36,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:09:36,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:09:36,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:09:36,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:09:36,419 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:09:36,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:09:36,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:09:36,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:09:36,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:09:36,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:09:36,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:09:36,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:09:36,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:09:36,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:09:36,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:09:36,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:09:36,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:09:36,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:09:36,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:09:36,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:09:36,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:09:36,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:09:36,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:09:36,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:09:36,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:09:36,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:09:36,437 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:09:36,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:09:36,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:09:36,438 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:09:36,438 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:09:36,439 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:09:36,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:09:36,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:09:36,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:09:36,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:09:36,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:09:36,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:09:36,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:09:36,442 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:09:36,455 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:09:36,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:09:36,456 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:09:36,456 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:09:36,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:09:36,456 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:09:36,456 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:09:36,457 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:09:36,457 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:09:36,457 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:09:36,457 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:09:36,457 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:09:36,457 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:09:36,457 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:09:36,457 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:09:36,457 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:09:36,457 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:09:36,458 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:09:36,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:09:36,458 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:09:36,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:09:36,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:09:36,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:09:36,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:09:36,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:09:36,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:09:36,459 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:09:36,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:09:36,459 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:09:36,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:09:36,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:09:36,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:09:36,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:09:36,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:09:36,460 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:09:36,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:09:36,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:09:36,460 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:09:36,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:09:36,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:09:36,460 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:09:36,460 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_fea31605-81a1-4fb5-bf1b-f4e882703f83/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6bcae8fdfc31b6b7d4775dfad537e0ca42e395c3a990a218ee828052c4f57f7 [2022-12-14 14:09:36,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:09:36,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:09:36,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:09:36,645 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:09:36,646 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:09:36,647 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.06.cil-2.c [2022-12-14 14:09:39,246 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:09:39,650 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:09:39,651 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/sv-benchmarks/c/combinations/Problem05_label43+token_ring.06.cil-2.c [2022-12-14 14:09:39,685 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/data/0712cf377/84efd8b016dd476f808ccdb9916da331/FLAG653277f21 [2022-12-14 14:09:39,696 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/data/0712cf377/84efd8b016dd476f808ccdb9916da331 [2022-12-14 14:09:39,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:09:39,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:09:39,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:09:39,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:09:39,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:09:39,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:09:39" (1/1) ... [2022-12-14 14:09:39,704 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12f7b12c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:09:39, skipping insertion in model container [2022-12-14 14:09:39,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:09:39" (1/1) ... [2022-12-14 14:09:39,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:09:39,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:09:41,153 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_fea31605-81a1-4fb5-bf1b-f4e882703f83/sv-benchmarks/c/combinations/Problem05_label43+token_ring.06.cil-2.c[381679,381692] [2022-12-14 14:09:41,173 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_fea31605-81a1-4fb5-bf1b-f4e882703f83/sv-benchmarks/c/combinations/Problem05_label43+token_ring.06.cil-2.c[383339,383352] [2022-12-14 14:09:41,355 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:09:41,362 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:09:42,109 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_fea31605-81a1-4fb5-bf1b-f4e882703f83/sv-benchmarks/c/combinations/Problem05_label43+token_ring.06.cil-2.c[381679,381692] [2022-12-14 14:09:42,111 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_fea31605-81a1-4fb5-bf1b-f4e882703f83/sv-benchmarks/c/combinations/Problem05_label43+token_ring.06.cil-2.c[383339,383352] [2022-12-14 14:09:42,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:09:42,169 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:09:42,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:09:42 WrapperNode [2022-12-14 14:09:42,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:09:42,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:09:42,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:09:42,170 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:09:42,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:09:42" (1/1) ... [2022-12-14 14:09:42,227 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:09:42" (1/1) ... [2022-12-14 14:09:42,469 INFO L138 Inliner]: procedures = 56, calls = 59, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 12851 [2022-12-14 14:09:42,469 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:09:42,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:09:42,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:09:42,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:09:42,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:09:42" (1/1) ... [2022-12-14 14:09:42,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:09:42" (1/1) ... [2022-12-14 14:09:42,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:09:42" (1/1) ... [2022-12-14 14:09:42,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:09:42" (1/1) ... [2022-12-14 14:09:42,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:09:42" (1/1) ... [2022-12-14 14:09:42,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:09:42" (1/1) ... [2022-12-14 14:09:42,666 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:09:42" (1/1) ... [2022-12-14 14:09:42,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:09:42" (1/1) ... [2022-12-14 14:09:42,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:09:42,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:09:42,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:09:42,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:09:42,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:09:42" (1/1) ... [2022-12-14 14:09:42,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:09:42,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:09:42,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:09:42,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:09:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:09:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 14:09:42,783 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 14:09:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 14:09:42,784 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 14:09:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 14:09:42,784 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 14:09:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 14:09:42,784 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 14:09:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 14:09:42,784 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 14:09:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 14:09:42,785 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 14:09:42,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:09:42,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:09:42,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:09:42,888 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:09:42,890 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:09:48,523 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:09:49,898 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:09:49,898 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-14 14:09:49,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:09:49 BoogieIcfgContainer [2022-12-14 14:09:49,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:09:49,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:09:49,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:09:49,907 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:09:49,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:09:39" (1/3) ... [2022-12-14 14:09:49,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@164dafa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:09:49, skipping insertion in model container [2022-12-14 14:09:49,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:09:42" (2/3) ... [2022-12-14 14:09:49,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@164dafa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:09:49, skipping insertion in model container [2022-12-14 14:09:49,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:09:49" (3/3) ... [2022-12-14 14:09:49,910 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.06.cil-2.c [2022-12-14 14:09:49,927 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:09:49,928 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 14:09:50,004 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:09:50,009 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;@66c1a1fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:09:50,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 14:09:50,019 INFO L276 IsEmpty]: Start isEmpty. Operand has 1765 states, 1736 states have (on average 1.9683179723502304) internal successors, (3417), 1739 states have internal predecessors, (3417), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-12-14 14:09:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 14:09:50,027 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:09:50,028 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] [2022-12-14 14:09:50,028 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:09:50,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:09:50,032 INFO L85 PathProgramCache]: Analyzing trace with hash -85434461, now seen corresponding path program 1 times [2022-12-14 14:09:50,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:09:50,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744013040] [2022-12-14 14:09:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:50,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:09:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:50,373 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 14:09:50,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:09:50,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744013040] [2022-12-14 14:09:50,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744013040] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:09:50,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:09:50,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:09:50,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018504223] [2022-12-14 14:09:50,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:09:50,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:09:50,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:09:50,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:09:50,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:09:50,410 INFO L87 Difference]: Start difference. First operand has 1765 states, 1736 states have (on average 1.9683179723502304) internal successors, (3417), 1739 states have internal predecessors, (3417), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 14:09:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:09:51,082 INFO L93 Difference]: Finished difference Result 3635 states and 7091 transitions. [2022-12-14 14:09:51,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:09:51,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 49 [2022-12-14 14:09:51,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:09:51,103 INFO L225 Difference]: With dead ends: 3635 [2022-12-14 14:09:51,103 INFO L226 Difference]: Without dead ends: 1869 [2022-12-14 14:09:51,111 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 14:09:51,114 INFO L413 NwaCegarLoop]: 3331 mSDtfsCounter, 3581 mSDsluCounter, 3257 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3581 SdHoareTripleChecker+Valid, 6588 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:09:51,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3581 Valid, 6588 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:09:51,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2022-12-14 14:09:51,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1868. [2022-12-14 14:09:51,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1818 states have (on average 1.9405940594059405) internal successors, (3528), 1821 states have internal predecessors, (3528), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2022-12-14 14:09:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 3600 transitions. [2022-12-14 14:09:51,227 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 3600 transitions. Word has length 49 [2022-12-14 14:09:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:09:51,227 INFO L495 AbstractCegarLoop]: Abstraction has 1868 states and 3600 transitions. [2022-12-14 14:09:51,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 14:09:51,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 3600 transitions. [2022-12-14 14:09:51,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 14:09:51,232 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:09:51,232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:09:51,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:09:51,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:09:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:09:51,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1564488506, now seen corresponding path program 1 times [2022-12-14 14:09:51,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:09:51,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273062430] [2022-12-14 14:09:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:51,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:09:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:09:51,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:09:51,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273062430] [2022-12-14 14:09:51,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273062430] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:09:51,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374911474] [2022-12-14 14:09:51,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:51,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:09:51,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:09:51,427 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:09:51,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:09:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:51,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:09:51,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:09:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 14:09:51,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:09:51,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374911474] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:09:51,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:09:51,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 14:09:51,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464681141] [2022-12-14 14:09:51,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:09:51,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:09:51,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:09:51,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:09:51,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:09:51,611 INFO L87 Difference]: Start difference. First operand 1868 states and 3600 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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 14:09:51,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:09:51,957 INFO L93 Difference]: Finished difference Result 2305 states and 4255 transitions. [2022-12-14 14:09:51,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:09:51,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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 94 [2022-12-14 14:09:51,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:09:51,968 INFO L225 Difference]: With dead ends: 2305 [2022-12-14 14:09:51,968 INFO L226 Difference]: Without dead ends: 2083 [2022-12-14 14:09:51,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 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 14:09:51,971 INFO L413 NwaCegarLoop]: 3241 mSDtfsCounter, 3411 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3411 SdHoareTripleChecker+Valid, 3376 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:09:51,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3411 Valid, 3376 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:09:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2022-12-14 14:09:52,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 2079. [2022-12-14 14:09:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 1987 states have (on average 1.898842476094615) internal successors, (3773), 1991 states have internal predecessors, (3773), 66 states have call successors, (66), 24 states have call predecessors, (66), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2022-12-14 14:09:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 3905 transitions. [2022-12-14 14:09:52,038 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 3905 transitions. Word has length 94 [2022-12-14 14:09:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:09:52,039 INFO L495 AbstractCegarLoop]: Abstraction has 2079 states and 3905 transitions. [2022-12-14 14:09:52,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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 14:09:52,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 3905 transitions. [2022-12-14 14:09:52,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 14:09:52,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:09:52,043 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:09:52,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:09:52,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:09:52,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:09:52,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:09:52,244 INFO L85 PathProgramCache]: Analyzing trace with hash -698350170, now seen corresponding path program 1 times [2022-12-14 14:09:52,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:09:52,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895245193] [2022-12-14 14:09:52,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:52,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:09:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:09:52,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:09:52,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895245193] [2022-12-14 14:09:52,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895245193] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:09:52,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593521596] [2022-12-14 14:09:52,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:52,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:09:52,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:09:52,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:09:52,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:09:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:52,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:09:52,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:09:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 14:09:52,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:09:52,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593521596] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:09:52,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:09:52,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 14:09:52,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371161137] [2022-12-14 14:09:52,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:09:52,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:09:52,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:09:52,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:09:52,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:09:52,517 INFO L87 Difference]: Start difference. First operand 2079 states and 3905 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 14:09:52,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:09:52,908 INFO L93 Difference]: Finished difference Result 2932 states and 5176 transitions. [2022-12-14 14:09:52,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:09:52,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 94 [2022-12-14 14:09:52,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:09:52,918 INFO L225 Difference]: With dead ends: 2932 [2022-12-14 14:09:52,918 INFO L226 Difference]: Without dead ends: 2499 [2022-12-14 14:09:52,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 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 14:09:52,921 INFO L413 NwaCegarLoop]: 3229 mSDtfsCounter, 3420 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3420 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:09:52,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3420 Valid, 3364 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:09:52,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2022-12-14 14:09:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 2493. [2022-12-14 14:09:53,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2319 states have (on average 1.833117723156533) internal successors, (4251), 2325 states have internal predecessors, (4251), 124 states have call successors, (124), 48 states have call predecessors, (124), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2022-12-14 14:09:53,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 4499 transitions. [2022-12-14 14:09:53,024 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 4499 transitions. Word has length 94 [2022-12-14 14:09:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:09:53,025 INFO L495 AbstractCegarLoop]: Abstraction has 2493 states and 4499 transitions. [2022-12-14 14:09:53,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 14:09:53,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 4499 transitions. [2022-12-14 14:09:53,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 14:09:53,028 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:09:53,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:09:53,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:09:53,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 14:09:53,229 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:09:53,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:09:53,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2017343290, now seen corresponding path program 1 times [2022-12-14 14:09:53,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:09:53,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757750550] [2022-12-14 14:09:53,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:53,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:09:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:09:53,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:09:53,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757750550] [2022-12-14 14:09:53,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757750550] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:09:53,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960456600] [2022-12-14 14:09:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:53,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:09:53,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:09:53,345 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:09:53,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:09:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:53,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:09:53,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:09:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 14:09:53,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:09:53,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960456600] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:09:53,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:09:53,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 14:09:53,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939791875] [2022-12-14 14:09:53,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:09:53,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:09:53,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:09:53,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:09:53,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:09:53,500 INFO L87 Difference]: Start difference. First operand 2493 states and 4499 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 14:09:53,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:09:53,901 INFO L93 Difference]: Finished difference Result 4162 states and 6968 transitions. [2022-12-14 14:09:53,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:09:53,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 94 [2022-12-14 14:09:53,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:09:53,917 INFO L225 Difference]: With dead ends: 4162 [2022-12-14 14:09:53,917 INFO L226 Difference]: Without dead ends: 3315 [2022-12-14 14:09:53,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 94 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 14:09:53,922 INFO L413 NwaCegarLoop]: 3239 mSDtfsCounter, 3417 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3374 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:09:53,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3417 Valid, 3374 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:09:53,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2022-12-14 14:09:54,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 3305. [2022-12-14 14:09:54,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 2971 states have (on average 1.7445304611242005) internal successors, (5183), 2981 states have internal predecessors, (5183), 236 states have call successors, (236), 96 states have call predecessors, (236), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2022-12-14 14:09:54,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 5655 transitions. [2022-12-14 14:09:54,046 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 5655 transitions. Word has length 94 [2022-12-14 14:09:54,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:09:54,046 INFO L495 AbstractCegarLoop]: Abstraction has 3305 states and 5655 transitions. [2022-12-14 14:09:54,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 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 14:09:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 5655 transitions. [2022-12-14 14:09:54,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 14:09:54,051 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:09:54,052 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:09:54,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 14:09:54,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:09:54,252 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:09:54,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:09:54,253 INFO L85 PathProgramCache]: Analyzing trace with hash 701225382, now seen corresponding path program 1 times [2022-12-14 14:09:54,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:09:54,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112912557] [2022-12-14 14:09:54,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:54,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:09:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 14:09:54,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:09:54,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112912557] [2022-12-14 14:09:54,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112912557] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:09:54,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:09:54,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:09:54,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425774058] [2022-12-14 14:09:54,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:09:54,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:09:54,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:09:54,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:09:54,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:09:54,316 INFO L87 Difference]: Start difference. First operand 3305 states and 5655 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 14:09:54,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:09:54,847 INFO L93 Difference]: Finished difference Result 4595 states and 7568 transitions. [2022-12-14 14:09:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:09:54,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 94 [2022-12-14 14:09:54,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:09:54,873 INFO L225 Difference]: With dead ends: 4595 [2022-12-14 14:09:54,873 INFO L226 Difference]: Without dead ends: 3745 [2022-12-14 14:09:54,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:09:54,876 INFO L413 NwaCegarLoop]: 3276 mSDtfsCounter, 73 mSDsluCounter, 3206 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 6482 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:09:54,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 6482 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:09:54,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2022-12-14 14:09:54,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3589. [2022-12-14 14:09:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3589 states, 3239 states have (on average 1.7409694350108058) internal successors, (5639), 3249 states have internal predecessors, (5639), 244 states have call successors, (244), 104 states have call predecessors, (244), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2022-12-14 14:09:54,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3589 states to 3589 states and 6127 transitions. [2022-12-14 14:09:54,962 INFO L78 Accepts]: Start accepts. Automaton has 3589 states and 6127 transitions. Word has length 94 [2022-12-14 14:09:54,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:09:54,962 INFO L495 AbstractCegarLoop]: Abstraction has 3589 states and 6127 transitions. [2022-12-14 14:09:54,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 14:09:54,962 INFO L276 IsEmpty]: Start isEmpty. Operand 3589 states and 6127 transitions. [2022-12-14 14:09:54,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 14:09:54,966 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:09:54,967 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:09:54,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 14:09:54,967 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:09:54,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:09:54,967 INFO L85 PathProgramCache]: Analyzing trace with hash -482462359, now seen corresponding path program 1 times [2022-12-14 14:09:54,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:09:54,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422916917] [2022-12-14 14:09:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:54,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:09:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:55,018 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 14:09:55,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:09:55,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422916917] [2022-12-14 14:09:55,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422916917] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:09:55,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:09:55,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:09:55,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182398667] [2022-12-14 14:09:55,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:09:55,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:09:55,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:09:55,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:09:55,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:09:55,021 INFO L87 Difference]: Start difference. First operand 3589 states and 6127 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:09:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:09:55,545 INFO L93 Difference]: Finished difference Result 7402 states and 11820 transitions. [2022-12-14 14:09:55,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:09:55,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-12-14 14:09:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:09:55,564 INFO L225 Difference]: With dead ends: 7402 [2022-12-14 14:09:55,564 INFO L226 Difference]: Without dead ends: 5459 [2022-12-14 14:09:55,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:09:55,570 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 3409 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3409 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:09:55,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3409 Valid, 3351 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:09:55,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5459 states. [2022-12-14 14:09:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5459 to 5433. [2022-12-14 14:09:55,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5433 states, 4755 states have (on average 1.6502628811777076) internal successors, (7847), 4773 states have internal predecessors, (7847), 468 states have call successors, (468), 208 states have call predecessors, (468), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2022-12-14 14:09:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5433 states to 5433 states and 8783 transitions. [2022-12-14 14:09:55,766 INFO L78 Accepts]: Start accepts. Automaton has 5433 states and 8783 transitions. Word has length 126 [2022-12-14 14:09:55,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:09:55,766 INFO L495 AbstractCegarLoop]: Abstraction has 5433 states and 8783 transitions. [2022-12-14 14:09:55,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:09:55,767 INFO L276 IsEmpty]: Start isEmpty. Operand 5433 states and 8783 transitions. [2022-12-14 14:09:55,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 14:09:55,776 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:09:55,776 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:09:55,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 14:09:55,776 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:09:55,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:09:55,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1748656734, now seen corresponding path program 1 times [2022-12-14 14:09:55,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:09:55,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171261529] [2022-12-14 14:09:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:55,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:09:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 14:09:55,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:09:55,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171261529] [2022-12-14 14:09:55,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171261529] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:09:55,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:09:55,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:09:55,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478672765] [2022-12-14 14:09:55,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:09:55,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:09:55,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:09:55,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:09:55,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:09:55,835 INFO L87 Difference]: Start difference. First operand 5433 states and 8783 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:09:56,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:09:56,361 INFO L93 Difference]: Finished difference Result 12862 states and 19764 transitions. [2022-12-14 14:09:56,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:09:56,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-12-14 14:09:56,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:09:56,388 INFO L225 Difference]: With dead ends: 12862 [2022-12-14 14:09:56,388 INFO L226 Difference]: Without dead ends: 9075 [2022-12-14 14:09:56,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:09:56,398 INFO L413 NwaCegarLoop]: 3216 mSDtfsCounter, 3411 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3411 SdHoareTripleChecker+Valid, 3351 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:09:56,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3411 Valid, 3351 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:09:56,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9075 states. [2022-12-14 14:09:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9075 to 9025. [2022-12-14 14:09:56,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9025 states, 7707 states have (on average 1.5703905540417802) internal successors, (12103), 7741 states have internal predecessors, (12103), 900 states have call successors, (900), 416 states have call predecessors, (900), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2022-12-14 14:09:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 13903 transitions. [2022-12-14 14:09:56,650 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 13903 transitions. Word has length 126 [2022-12-14 14:09:56,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:09:56,650 INFO L495 AbstractCegarLoop]: Abstraction has 9025 states and 13903 transitions. [2022-12-14 14:09:56,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:09:56,651 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 13903 transitions. [2022-12-14 14:09:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-12-14 14:09:56,663 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:09:56,663 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:09:56,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 14:09:56,663 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:09:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:09:56,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1385389259, now seen corresponding path program 1 times [2022-12-14 14:09:56,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:09:56,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434698718] [2022-12-14 14:09:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:56,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:09:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:56,712 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 14:09:56,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:09:56,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434698718] [2022-12-14 14:09:56,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434698718] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:09:56,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:09:56,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:09:56,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555241037] [2022-12-14 14:09:56,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:09:56,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:09:56,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:09:56,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:09:56,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:09:56,715 INFO L87 Difference]: Start difference. First operand 9025 states and 13903 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:09:57,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:09:57,369 INFO L93 Difference]: Finished difference Result 23494 states and 35060 transitions. [2022-12-14 14:09:57,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:09:57,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-12-14 14:09:57,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:09:57,404 INFO L225 Difference]: With dead ends: 23494 [2022-12-14 14:09:57,404 INFO L226 Difference]: Without dead ends: 16115 [2022-12-14 14:09:57,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:09:57,418 INFO L413 NwaCegarLoop]: 3230 mSDtfsCounter, 3414 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3414 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:09:57,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3414 Valid, 3365 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:09:57,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16115 states. [2022-12-14 14:09:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16115 to 16017. [2022-12-14 14:09:57,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16017 states, 13451 states have (on average 1.5088097539216414) internal successors, (20295), 13517 states have internal predecessors, (20295), 1732 states have call successors, (1732), 832 states have call predecessors, (1732), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2022-12-14 14:09:57,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16017 states to 16017 states and 23759 transitions. [2022-12-14 14:09:57,825 INFO L78 Accepts]: Start accepts. Automaton has 16017 states and 23759 transitions. Word has length 126 [2022-12-14 14:09:57,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:09:57,825 INFO L495 AbstractCegarLoop]: Abstraction has 16017 states and 23759 transitions. [2022-12-14 14:09:57,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:09:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 16017 states and 23759 transitions. [2022-12-14 14:09:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 14:09:57,857 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:09:57,858 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:09:57,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 14:09:57,858 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:09:57,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:09:57,858 INFO L85 PathProgramCache]: Analyzing trace with hash 499230127, now seen corresponding path program 1 times [2022-12-14 14:09:57,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:09:57,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223597361] [2022-12-14 14:09:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:57,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:09:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:57,942 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 14:09:57,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:09:57,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223597361] [2022-12-14 14:09:57,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223597361] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:09:57,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143207856] [2022-12-14 14:09:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:57,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:09:57,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:09:57,944 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:09:57,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:09:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:09:58,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:09:58,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:09:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 14:09:58,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:09:58,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143207856] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:09:58,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:09:58,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 14:09:58,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782605343] [2022-12-14 14:09:58,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:09:58,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:09:58,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:09:58,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:09:58,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:09:58,113 INFO L87 Difference]: Start difference. First operand 16017 states and 23759 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:09:58,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:09:58,834 INFO L93 Difference]: Finished difference Result 29013 states and 42769 transitions. [2022-12-14 14:09:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:09:58,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 145 [2022-12-14 14:09:58,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:09:58,887 INFO L225 Difference]: With dead ends: 29013 [2022-12-14 14:09:58,887 INFO L226 Difference]: Without dead ends: 21635 [2022-12-14 14:09:58,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:09:58,906 INFO L413 NwaCegarLoop]: 3305 mSDtfsCounter, 110 mSDsluCounter, 3208 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 6513 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:09:58,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 6513 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:09:58,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21635 states. [2022-12-14 14:09:59,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21635 to 18913. [2022-12-14 14:09:59,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18913 states, 16155 states have (on average 1.5355617455896007) internal successors, (24807), 16221 states have internal predecessors, (24807), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2022-12-14 14:09:59,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18913 states to 18913 states and 28463 transitions. [2022-12-14 14:09:59,599 INFO L78 Accepts]: Start accepts. Automaton has 18913 states and 28463 transitions. Word has length 145 [2022-12-14 14:09:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:09:59,600 INFO L495 AbstractCegarLoop]: Abstraction has 18913 states and 28463 transitions. [2022-12-14 14:09:59,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:09:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 18913 states and 28463 transitions. [2022-12-14 14:09:59,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 14:09:59,629 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:09:59,629 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:09:59,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:09:59,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:09:59,830 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:09:59,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:09:59,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1261871463, now seen corresponding path program 2 times [2022-12-14 14:09:59,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:09:59,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932000417] [2022-12-14 14:09:59,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:09:59,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:09:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 14:10:00,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:10:00,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932000417] [2022-12-14 14:10:00,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932000417] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:10:00,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421110721] [2022-12-14 14:10:00,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:10:00,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:10:00,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:10:00,020 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:10:00,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:10:00,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 14:10:00,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:10:00,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:10:00,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:10:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 14:10:00,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:10:00,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421110721] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:10:00,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:10:00,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:10:00,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891684353] [2022-12-14 14:10:00,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:10:00,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:10:00,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:10:00,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:10:00,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:10:00,192 INFO L87 Difference]: Start difference. First operand 18913 states and 28463 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:10:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:10:01,037 INFO L93 Difference]: Finished difference Result 29253 states and 44337 transitions. [2022-12-14 14:10:01,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:10:01,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 145 [2022-12-14 14:10:01,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:10:01,079 INFO L225 Difference]: With dead ends: 29253 [2022-12-14 14:10:01,079 INFO L226 Difference]: Without dead ends: 18979 [2022-12-14 14:10:01,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:10:01,099 INFO L413 NwaCegarLoop]: 3325 mSDtfsCounter, 141 mSDsluCounter, 3193 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 6518 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:10:01,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 6518 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:10:01,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18979 states. [2022-12-14 14:10:01,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18979 to 18849. [2022-12-14 14:10:01,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18849 states, 16091 states have (on average 1.5217823628115095) internal successors, (24487), 16157 states have internal predecessors, (24487), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2022-12-14 14:10:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18849 states to 18849 states and 28143 transitions. [2022-12-14 14:10:01,637 INFO L78 Accepts]: Start accepts. Automaton has 18849 states and 28143 transitions. Word has length 145 [2022-12-14 14:10:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:10:01,637 INFO L495 AbstractCegarLoop]: Abstraction has 18849 states and 28143 transitions. [2022-12-14 14:10:01,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:10:01,638 INFO L276 IsEmpty]: Start isEmpty. Operand 18849 states and 28143 transitions. [2022-12-14 14:10:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 14:10:01,660 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:10:01,660 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:10:01,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 14:10:01,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 14:10:01,861 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:10:01,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:10:01,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1742185065, now seen corresponding path program 1 times [2022-12-14 14:10:01,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:10:01,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376684843] [2022-12-14 14:10:01,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:01,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:10:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 14:10:02,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:10:02,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376684843] [2022-12-14 14:10:02,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376684843] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:10:02,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912405297] [2022-12-14 14:10:02,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:02,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:10:02,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:10:02,043 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:10:02,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:10:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:02,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:10:02,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:10:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 14:10:02,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:10:02,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912405297] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:10:02,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:10:02,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:10:02,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712004604] [2022-12-14 14:10:02,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:10:02,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:10:02,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:10:02,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:10:02,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:10:02,211 INFO L87 Difference]: Start difference. First operand 18849 states and 28143 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:10:03,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:10:03,043 INFO L93 Difference]: Finished difference Result 27757 states and 41601 transitions. [2022-12-14 14:10:03,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:10:03,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 145 [2022-12-14 14:10:03,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:10:03,078 INFO L225 Difference]: With dead ends: 27757 [2022-12-14 14:10:03,078 INFO L226 Difference]: Without dead ends: 18915 [2022-12-14 14:10:03,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:10:03,096 INFO L413 NwaCegarLoop]: 3313 mSDtfsCounter, 138 mSDsluCounter, 3192 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 6505 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:10:03,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 6505 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:10:03,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18915 states. [2022-12-14 14:10:03,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18915 to 18689. [2022-12-14 14:10:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18689 states, 15931 states have (on average 1.5049274998430733) internal successors, (23975), 15997 states have internal predecessors, (23975), 1828 states have call successors, (1828), 928 states have call predecessors, (1828), 928 states have return successors, (1828), 1764 states have call predecessors, (1828), 1828 states have call successors, (1828) [2022-12-14 14:10:03,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18689 states to 18689 states and 27631 transitions. [2022-12-14 14:10:03,753 INFO L78 Accepts]: Start accepts. Automaton has 18689 states and 27631 transitions. Word has length 145 [2022-12-14 14:10:03,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:10:03,753 INFO L495 AbstractCegarLoop]: Abstraction has 18689 states and 27631 transitions. [2022-12-14 14:10:03,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:10:03,753 INFO L276 IsEmpty]: Start isEmpty. Operand 18689 states and 27631 transitions. [2022-12-14 14:10:03,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 14:10:03,776 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:10:03,776 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:10:03,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 14:10:03,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:10:03,978 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:10:03,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:10:03,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1441252057, now seen corresponding path program 1 times [2022-12-14 14:10:03,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:10:03,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712511388] [2022-12-14 14:10:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:03,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:10:04,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 14:10:04,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:10:04,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712511388] [2022-12-14 14:10:04,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712511388] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:10:04,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574859085] [2022-12-14 14:10:04,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:04,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:10:04,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:10:04,177 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:10:04,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:10:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:04,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:10:04,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:10:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 14:10:04,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:10:04,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574859085] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:10:04,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:10:04,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:10:04,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149793436] [2022-12-14 14:10:04,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:10:04,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:10:04,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:10:04,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:10:04,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:10:04,345 INFO L87 Difference]: Start difference. First operand 18689 states and 27631 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:10:05,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:10:05,143 INFO L93 Difference]: Finished difference Result 31061 states and 44714 transitions. [2022-12-14 14:10:05,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:10:05,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 145 [2022-12-14 14:10:05,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:10:05,183 INFO L225 Difference]: With dead ends: 31061 [2022-12-14 14:10:05,184 INFO L226 Difference]: Without dead ends: 22459 [2022-12-14 14:10:05,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:10:05,202 INFO L413 NwaCegarLoop]: 3220 mSDtfsCounter, 3417 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3259 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:10:05,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3417 Valid, 3259 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:10:05,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22459 states. [2022-12-14 14:10:05,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22459 to 22459. [2022-12-14 14:10:05,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22459 states, 19321 states have (on average 1.4494591377257906) internal successors, (28005), 19387 states have internal predecessors, (28005), 1954 states have call successors, (1954), 1182 states have call predecessors, (1954), 1182 states have return successors, (1954), 1890 states have call predecessors, (1954), 1954 states have call successors, (1954) [2022-12-14 14:10:05,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22459 states to 22459 states and 31913 transitions. [2022-12-14 14:10:05,922 INFO L78 Accepts]: Start accepts. Automaton has 22459 states and 31913 transitions. Word has length 145 [2022-12-14 14:10:05,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:10:05,922 INFO L495 AbstractCegarLoop]: Abstraction has 22459 states and 31913 transitions. [2022-12-14 14:10:05,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:10:05,922 INFO L276 IsEmpty]: Start isEmpty. Operand 22459 states and 31913 transitions. [2022-12-14 14:10:05,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 14:10:05,947 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:10:05,947 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:10:05,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 14:10:06,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 14:10:06,149 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:10:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:10:06,150 INFO L85 PathProgramCache]: Analyzing trace with hash -133452218, now seen corresponding path program 1 times [2022-12-14 14:10:06,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:10:06,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337181470] [2022-12-14 14:10:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:06,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:10:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 14:10:06,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:10:06,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337181470] [2022-12-14 14:10:06,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337181470] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:10:06,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533542625] [2022-12-14 14:10:06,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:06,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:10:06,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:10:06,314 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:10:06,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 14:10:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:06,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 14:10:06,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:10:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 14:10:06,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:10:06,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533542625] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:10:06,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:10:06,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 14:10:06,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395015515] [2022-12-14 14:10:06,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:10:06,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:10:06,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:10:06,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:10:06,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:10:06,524 INFO L87 Difference]: Start difference. First operand 22459 states and 31913 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 14:10:08,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:10:08,402 INFO L93 Difference]: Finished difference Result 64557 states and 89721 transitions. [2022-12-14 14:10:08,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:10:08,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 146 [2022-12-14 14:10:08,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:10:08,502 INFO L225 Difference]: With dead ends: 64557 [2022-12-14 14:10:08,502 INFO L226 Difference]: Without dead ends: 43745 [2022-12-14 14:10:08,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:10:08,531 INFO L413 NwaCegarLoop]: 3357 mSDtfsCounter, 3435 mSDsluCounter, 3468 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3435 SdHoareTripleChecker+Valid, 6825 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:10:08,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3435 Valid, 6825 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:10:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43745 states. [2022-12-14 14:10:09,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43745 to 43679. [2022-12-14 14:10:09,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43679 states, 37413 states have (on average 1.4130115200598723) internal successors, (52865), 37607 states have internal predecessors, (52865), 3838 states have call successors, (3838), 2362 states have call predecessors, (3838), 2426 states have return successors, (4030), 3710 states have call predecessors, (4030), 3838 states have call successors, (4030) [2022-12-14 14:10:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43679 states to 43679 states and 60733 transitions. [2022-12-14 14:10:09,917 INFO L78 Accepts]: Start accepts. Automaton has 43679 states and 60733 transitions. Word has length 146 [2022-12-14 14:10:09,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:10:09,918 INFO L495 AbstractCegarLoop]: Abstraction has 43679 states and 60733 transitions. [2022-12-14 14:10:09,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 14:10:09,918 INFO L276 IsEmpty]: Start isEmpty. Operand 43679 states and 60733 transitions. [2022-12-14 14:10:09,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-12-14 14:10:09,985 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:10:09,986 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:10:09,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 14:10:10,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 14:10:10,187 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:10:10,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:10:10,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1472198901, now seen corresponding path program 1 times [2022-12-14 14:10:10,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:10:10,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926775243] [2022-12-14 14:10:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:10,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:10:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 14:10:10,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:10:10,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926775243] [2022-12-14 14:10:10,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926775243] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:10:10,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892618730] [2022-12-14 14:10:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:10,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:10:10,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:10:10,448 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:10:10,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 14:10:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:10,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:10:10,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:10:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 14:10:10,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:10:10,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892618730] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:10:10,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:10:10,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:10:10,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018829066] [2022-12-14 14:10:10,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:10:10,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:10:10,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:10:10,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:10:10,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:10:10,597 INFO L87 Difference]: Start difference. First operand 43679 states and 60733 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:10:12,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:10:12,785 INFO L93 Difference]: Finished difference Result 101577 states and 142240 transitions. [2022-12-14 14:10:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:10:12,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2022-12-14 14:10:12,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:10:12,942 INFO L225 Difference]: With dead ends: 101577 [2022-12-14 14:10:12,943 INFO L226 Difference]: Without dead ends: 59545 [2022-12-14 14:10:13,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:10:13,009 INFO L413 NwaCegarLoop]: 3225 mSDtfsCounter, 75 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 6422 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 14:10:13,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 6422 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 14:10:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59545 states. [2022-12-14 14:10:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59545 to 49227. [2022-12-14 14:10:14,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49227 states, 42571 states have (on average 1.438890324399239) internal successors, (61255), 42767 states have internal predecessors, (61255), 4033 states have call successors, (4033), 2557 states have call predecessors, (4033), 2621 states have return successors, (4225), 3903 states have call predecessors, (4225), 4033 states have call successors, (4225) [2022-12-14 14:10:14,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49227 states to 49227 states and 69513 transitions. [2022-12-14 14:10:14,886 INFO L78 Accepts]: Start accepts. Automaton has 49227 states and 69513 transitions. Word has length 146 [2022-12-14 14:10:14,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:10:14,886 INFO L495 AbstractCegarLoop]: Abstraction has 49227 states and 69513 transitions. [2022-12-14 14:10:14,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:10:14,886 INFO L276 IsEmpty]: Start isEmpty. Operand 49227 states and 69513 transitions. [2022-12-14 14:10:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 14:10:14,946 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:10:14,946 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:10:14,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 14:10:15,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:10:15,147 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:10:15,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:10:15,149 INFO L85 PathProgramCache]: Analyzing trace with hash -221149716, now seen corresponding path program 1 times [2022-12-14 14:10:15,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:10:15,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301964881] [2022-12-14 14:10:15,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:15,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:10:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 14:10:15,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:10:15,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301964881] [2022-12-14 14:10:15,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301964881] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:10:15,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469533890] [2022-12-14 14:10:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:15,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:10:15,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:10:15,302 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:10:15,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 14:10:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:15,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:10:15,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:10:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 14:10:15,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:10:15,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469533890] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:10:15,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:10:15,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 14:10:15,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088024314] [2022-12-14 14:10:15,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:10:15,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:10:15,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:10:15,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:10:15,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:10:15,532 INFO L87 Difference]: Start difference. First operand 49227 states and 69513 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:10:18,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:10:18,884 INFO L93 Difference]: Finished difference Result 119447 states and 167171 transitions. [2022-12-14 14:10:18,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:10:18,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 147 [2022-12-14 14:10:18,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:10:19,038 INFO L225 Difference]: With dead ends: 119447 [2022-12-14 14:10:19,039 INFO L226 Difference]: Without dead ends: 71867 [2022-12-14 14:10:19,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:10:19,197 INFO L413 NwaCegarLoop]: 3200 mSDtfsCounter, 7035 mSDsluCounter, 6304 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7050 SdHoareTripleChecker+Valid, 9504 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:10:19,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7050 Valid, 9504 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:10:19,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71867 states. [2022-12-14 14:10:22,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71867 to 71865. [2022-12-14 14:10:22,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71865 states, 61957 states have (on average 1.4190648352889907) internal successors, (87921), 62249 states have internal predecessors, (87921), 5979 states have call successors, (5979), 3831 states have call predecessors, (5979), 3927 states have return successors, (6267), 5785 states have call predecessors, (6267), 5979 states have call successors, (6267) [2022-12-14 14:10:22,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71865 states to 71865 states and 100167 transitions. [2022-12-14 14:10:22,373 INFO L78 Accepts]: Start accepts. Automaton has 71865 states and 100167 transitions. Word has length 147 [2022-12-14 14:10:22,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:10:22,373 INFO L495 AbstractCegarLoop]: Abstraction has 71865 states and 100167 transitions. [2022-12-14 14:10:22,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:10:22,373 INFO L276 IsEmpty]: Start isEmpty. Operand 71865 states and 100167 transitions. [2022-12-14 14:10:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 14:10:22,466 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:10:22,466 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:10:22,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 14:10:22,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 14:10:22,667 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:10:22,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:10:22,669 INFO L85 PathProgramCache]: Analyzing trace with hash 2042685000, now seen corresponding path program 1 times [2022-12-14 14:10:22,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:10:22,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912702103] [2022-12-14 14:10:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:22,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:10:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 14:10:22,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:10:22,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912702103] [2022-12-14 14:10:22,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912702103] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:10:22,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102701950] [2022-12-14 14:10:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:22,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:10:22,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:10:22,838 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:10:22,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 14:10:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:22,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:10:22,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:10:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 14:10:23,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:10:23,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102701950] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:10:23,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:10:23,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 14:10:23,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676740621] [2022-12-14 14:10:23,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:10:23,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:10:23,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:10:23,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:10:23,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:10:23,039 INFO L87 Difference]: Start difference. First operand 71865 states and 100167 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:10:28,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:10:28,199 INFO L93 Difference]: Finished difference Result 175177 states and 242381 transitions. [2022-12-14 14:10:28,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:10:28,200 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2022-12-14 14:10:28,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:10:28,436 INFO L225 Difference]: With dead ends: 175177 [2022-12-14 14:10:28,436 INFO L226 Difference]: Without dead ends: 104959 [2022-12-14 14:10:28,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:10:28,521 INFO L413 NwaCegarLoop]: 3204 mSDtfsCounter, 3691 mSDsluCounter, 6367 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3706 SdHoareTripleChecker+Valid, 9571 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:10:28,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3706 Valid, 9571 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:10:28,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104959 states. [2022-12-14 14:10:32,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104959 to 104957. [2022-12-14 14:10:32,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104957 states, 90209 states have (on average 1.3987628728840804) internal successors, (126181), 90645 states have internal predecessors, (126181), 8863 states have call successors, (8863), 5739 states have call predecessors, (8863), 5883 states have return successors, (9295), 8573 states have call predecessors, (9295), 8863 states have call successors, (9295) [2022-12-14 14:10:33,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104957 states to 104957 states and 144339 transitions. [2022-12-14 14:10:33,053 INFO L78 Accepts]: Start accepts. Automaton has 104957 states and 144339 transitions. Word has length 149 [2022-12-14 14:10:33,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:10:33,053 INFO L495 AbstractCegarLoop]: Abstraction has 104957 states and 144339 transitions. [2022-12-14 14:10:33,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:10:33,053 INFO L276 IsEmpty]: Start isEmpty. Operand 104957 states and 144339 transitions. [2022-12-14 14:10:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 14:10:33,190 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:10:33,190 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:10:33,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 14:10:33,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 14:10:33,391 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:10:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:10:33,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1264089334, now seen corresponding path program 1 times [2022-12-14 14:10:33,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:10:33,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745340591] [2022-12-14 14:10:33,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:33,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:10:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:33,465 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 14:10:33,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:10:33,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745340591] [2022-12-14 14:10:33,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745340591] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:10:33,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906372695] [2022-12-14 14:10:33,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:33,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:10:33,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:10:33,467 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:10:33,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 14:10:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:33,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:10:33,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:10:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 14:10:33,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:10:33,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906372695] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:10:33,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:10:33,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 14:10:33,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479887623] [2022-12-14 14:10:33,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:10:33,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:10:33,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:10:33,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:10:33,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:10:33,613 INFO L87 Difference]: Start difference. First operand 104957 states and 144339 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:10:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:10:39,350 INFO L93 Difference]: Finished difference Result 201185 states and 278425 transitions. [2022-12-14 14:10:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:10:39,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 148 [2022-12-14 14:10:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:10:39,633 INFO L225 Difference]: With dead ends: 201185 [2022-12-14 14:10:39,633 INFO L226 Difference]: Without dead ends: 132275 [2022-12-14 14:10:39,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:10:39,722 INFO L413 NwaCegarLoop]: 3295 mSDtfsCounter, 101 mSDsluCounter, 3206 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 6501 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:10:39,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 6501 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:10:39,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132275 states. [2022-12-14 14:10:44,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132275 to 119261. [2022-12-14 14:10:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119261 states, 103361 states have (on average 1.4204680682268942) internal successors, (146821), 103797 states have internal predecessors, (146821), 9439 states have call successors, (9439), 6315 states have call predecessors, (9439), 6459 states have return successors, (9871), 9149 states have call predecessors, (9871), 9439 states have call successors, (9871) [2022-12-14 14:10:44,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119261 states to 119261 states and 166131 transitions. [2022-12-14 14:10:44,972 INFO L78 Accepts]: Start accepts. Automaton has 119261 states and 166131 transitions. Word has length 148 [2022-12-14 14:10:44,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:10:44,973 INFO L495 AbstractCegarLoop]: Abstraction has 119261 states and 166131 transitions. [2022-12-14 14:10:44,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:10:44,973 INFO L276 IsEmpty]: Start isEmpty. Operand 119261 states and 166131 transitions. [2022-12-14 14:10:45,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-12-14 14:10:45,116 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:10:45,117 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:10:45,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 14:10:45,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 14:10:45,318 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:10:45,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:10:45,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1864111784, now seen corresponding path program 1 times [2022-12-14 14:10:45,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:10:45,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876816993] [2022-12-14 14:10:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:45,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:10:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 14:10:45,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:10:45,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876816993] [2022-12-14 14:10:45,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876816993] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:10:45,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917436813] [2022-12-14 14:10:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:45,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:10:45,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:10:45,480 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:10:45,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 14:10:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:45,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 846 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:10:45,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:10:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 14:10:45,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:10:45,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917436813] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:10:45,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:10:45,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 14:10:45,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741260461] [2022-12-14 14:10:45,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:10:45,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:10:45,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:10:45,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:10:45,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:10:45,667 INFO L87 Difference]: Start difference. First operand 119261 states and 166131 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:10:50,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:10:50,976 INFO L93 Difference]: Finished difference Result 212500 states and 294130 transitions. [2022-12-14 14:10:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:10:50,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 149 [2022-12-14 14:10:50,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:10:51,166 INFO L225 Difference]: With dead ends: 212500 [2022-12-14 14:10:51,167 INFO L226 Difference]: Without dead ends: 94886 [2022-12-14 14:10:51,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:10:51,282 INFO L413 NwaCegarLoop]: 3211 mSDtfsCounter, 7066 mSDsluCounter, 6313 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7081 SdHoareTripleChecker+Valid, 9524 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:10:51,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7081 Valid, 9524 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:10:51,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94886 states. [2022-12-14 14:10:55,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94886 to 91776. [2022-12-14 14:10:55,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91776 states, 79619 states have (on average 1.4177646039261986) internal successors, (112881), 79982 states have internal predecessors, (112881), 7125 states have call successors, (7125), 4742 states have call predecessors, (7125), 5030 states have return successors, (7413), 7052 states have call predecessors, (7413), 7125 states have call successors, (7413) [2022-12-14 14:10:55,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91776 states to 91776 states and 127419 transitions. [2022-12-14 14:10:55,913 INFO L78 Accepts]: Start accepts. Automaton has 91776 states and 127419 transitions. Word has length 149 [2022-12-14 14:10:55,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:10:55,913 INFO L495 AbstractCegarLoop]: Abstraction has 91776 states and 127419 transitions. [2022-12-14 14:10:55,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:10:55,913 INFO L276 IsEmpty]: Start isEmpty. Operand 91776 states and 127419 transitions. [2022-12-14 14:10:56,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 14:10:56,020 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:10:56,020 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:10:56,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 14:10:56,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 14:10:56,221 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:10:56,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:10:56,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1511492624, now seen corresponding path program 2 times [2022-12-14 14:10:56,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:10:56,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928190178] [2022-12-14 14:10:56,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:10:56,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:10:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:10:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 14:10:56,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:10:56,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928190178] [2022-12-14 14:10:56,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928190178] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:10:56,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432172322] [2022-12-14 14:10:56,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:10:56,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:10:56,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:10:56,359 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:10:56,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 14:10:56,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 14:10:56,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:10:56,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:10:56,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:10:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 14:10:56,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:10:56,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432172322] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:10:56,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:10:56,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:10:56,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608298435] [2022-12-14 14:10:56,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:10:56,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:10:56,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:10:56,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:10:56,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:10:56,491 INFO L87 Difference]: Start difference. First operand 91776 states and 127419 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:11:00,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:11:00,742 INFO L93 Difference]: Finished difference Result 122258 states and 169936 transitions. [2022-12-14 14:11:00,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:11:00,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 150 [2022-12-14 14:11:00,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:11:00,916 INFO L225 Difference]: With dead ends: 122258 [2022-12-14 14:11:00,916 INFO L226 Difference]: Without dead ends: 88200 [2022-12-14 14:11:00,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:11:00,971 INFO L413 NwaCegarLoop]: 3219 mSDtfsCounter, 40 mSDsluCounter, 3196 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 6415 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:11:00,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 6415 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:11:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88200 states. [2022-12-14 14:11:04,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88200 to 83400. [2022-12-14 14:11:04,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83400 states, 72107 states have (on average 1.4346596030898526) internal successors, (103449), 72254 states have internal predecessors, (103449), 6837 states have call successors, (6837), 4454 states have call predecessors, (6837), 4454 states have return successors, (6837), 6692 states have call predecessors, (6837), 6837 states have call successors, (6837) [2022-12-14 14:11:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83400 states to 83400 states and 117123 transitions. [2022-12-14 14:11:05,086 INFO L78 Accepts]: Start accepts. Automaton has 83400 states and 117123 transitions. Word has length 150 [2022-12-14 14:11:05,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:11:05,086 INFO L495 AbstractCegarLoop]: Abstraction has 83400 states and 117123 transitions. [2022-12-14 14:11:05,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:11:05,087 INFO L276 IsEmpty]: Start isEmpty. Operand 83400 states and 117123 transitions. [2022-12-14 14:11:05,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-12-14 14:11:05,193 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:11:05,193 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:11:05,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 14:11:05,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:11:05,394 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:11:05,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:11:05,394 INFO L85 PathProgramCache]: Analyzing trace with hash 824812859, now seen corresponding path program 1 times [2022-12-14 14:11:05,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:11:05,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667915937] [2022-12-14 14:11:05,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:05,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:11:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:05,533 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 14:11:05,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:11:05,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667915937] [2022-12-14 14:11:05,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667915937] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:11:05,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668392131] [2022-12-14 14:11:05,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:05,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:11:05,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:11:05,534 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:11:05,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 14:11:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:05,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:11:05,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:11:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 14:11:05,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:11:05,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668392131] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:11:05,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:11:05,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 14:11:05,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441803256] [2022-12-14 14:11:05,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:11:05,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:11:05,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:11:05,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:11:05,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:11:05,701 INFO L87 Difference]: Start difference. First operand 83400 states and 117123 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:11:12,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:11:12,251 INFO L93 Difference]: Finished difference Result 202868 states and 282813 transitions. [2022-12-14 14:11:12,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:11:12,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 150 [2022-12-14 14:11:12,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:11:12,524 INFO L225 Difference]: With dead ends: 202868 [2022-12-14 14:11:12,524 INFO L226 Difference]: Without dead ends: 121166 [2022-12-14 14:11:12,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:11:12,629 INFO L413 NwaCegarLoop]: 3197 mSDtfsCounter, 7079 mSDsluCounter, 6308 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7094 SdHoareTripleChecker+Valid, 9505 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:11:12,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7094 Valid, 9505 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:11:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121166 states. [2022-12-14 14:11:18,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121166 to 121164. [2022-12-14 14:11:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121164 states, 104359 states have (on average 1.4088770494159584) internal successors, (147029), 104578 states have internal predecessors, (147029), 10133 states have call successors, (10133), 6670 states have call predecessors, (10133), 6670 states have return successors, (10133), 9916 states have call predecessors, (10133), 10133 states have call successors, (10133) [2022-12-14 14:11:19,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121164 states to 121164 states and 167295 transitions. [2022-12-14 14:11:19,196 INFO L78 Accepts]: Start accepts. Automaton has 121164 states and 167295 transitions. Word has length 150 [2022-12-14 14:11:19,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:11:19,196 INFO L495 AbstractCegarLoop]: Abstraction has 121164 states and 167295 transitions. [2022-12-14 14:11:19,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:11:19,196 INFO L276 IsEmpty]: Start isEmpty. Operand 121164 states and 167295 transitions. [2022-12-14 14:11:19,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 14:11:19,349 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:11:19,349 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:11:19,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 14:11:19,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:11:19,550 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:11:19,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:11:19,551 INFO L85 PathProgramCache]: Analyzing trace with hash 867902147, now seen corresponding path program 1 times [2022-12-14 14:11:19,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:11:19,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455984623] [2022-12-14 14:11:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:19,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:11:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 14:11:19,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:11:19,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455984623] [2022-12-14 14:11:19,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455984623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:11:19,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242638734] [2022-12-14 14:11:19,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:19,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:11:19,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:11:19,804 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:11:19,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 14:11:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:19,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:11:19,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:11:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 14:11:20,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:11:20,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242638734] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:11:20,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:11:20,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-12-14 14:11:20,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767958582] [2022-12-14 14:11:20,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:11:20,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:11:20,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:11:20,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:11:20,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:11:20,027 INFO L87 Difference]: Start difference. First operand 121164 states and 167295 transitions. Second operand has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:11:30,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:11:30,227 INFO L93 Difference]: Finished difference Result 287660 states and 394737 transitions. [2022-12-14 14:11:30,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:11:30,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 152 [2022-12-14 14:11:30,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:11:30,598 INFO L225 Difference]: With dead ends: 287660 [2022-12-14 14:11:30,598 INFO L226 Difference]: Without dead ends: 168194 [2022-12-14 14:11:30,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 14:11:30,730 INFO L413 NwaCegarLoop]: 3202 mSDtfsCounter, 3685 mSDsluCounter, 6360 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3700 SdHoareTripleChecker+Valid, 9562 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:11:30,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3700 Valid, 9562 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:11:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168194 states. [2022-12-14 14:11:40,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168194 to 168192. [2022-12-14 14:11:40,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168192 states, 144053 states have (on average 1.387551803849972) internal successors, (199881), 144380 states have internal predecessors, (199881), 14583 states have call successors, (14583), 9554 states have call predecessors, (14583), 9554 states have return successors, (14583), 14258 states have call predecessors, (14583), 14583 states have call successors, (14583) [2022-12-14 14:11:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168192 states to 168192 states and 229047 transitions. [2022-12-14 14:11:41,175 INFO L78 Accepts]: Start accepts. Automaton has 168192 states and 229047 transitions. Word has length 152 [2022-12-14 14:11:41,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:11:41,176 INFO L495 AbstractCegarLoop]: Abstraction has 168192 states and 229047 transitions. [2022-12-14 14:11:41,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:11:41,176 INFO L276 IsEmpty]: Start isEmpty. Operand 168192 states and 229047 transitions. [2022-12-14 14:11:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-14 14:11:41,379 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:11:41,380 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:11:41,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 14:11:41,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 14:11:41,581 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:11:41,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:11:41,582 INFO L85 PathProgramCache]: Analyzing trace with hash -617205789, now seen corresponding path program 1 times [2022-12-14 14:11:41,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:11:41,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526187217] [2022-12-14 14:11:41,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:41,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:11:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 14:11:41,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:11:41,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526187217] [2022-12-14 14:11:41,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526187217] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:11:41,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204645626] [2022-12-14 14:11:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:11:41,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:11:41,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:11:41,738 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:11:41,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 14:11:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:11:41,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:11:41,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:11:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 14:11:41,893 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:11:41,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204645626] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:11:41,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:11:41,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 14:11:41,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315046655] [2022-12-14 14:11:41,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:11:41,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:11:41,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:11:41,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:11:41,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:11:41,895 INFO L87 Difference]: Start difference. First operand 168192 states and 229047 transitions. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:11:57,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:11:57,797 INFO L93 Difference]: Finished difference Result 411707 states and 557637 transitions. [2022-12-14 14:11:57,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:11:57,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 154 [2022-12-14 14:11:57,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:11:58,401 INFO L225 Difference]: With dead ends: 411707 [2022-12-14 14:11:58,402 INFO L226 Difference]: Without dead ends: 245213 [2022-12-14 14:11:58,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:11:58,604 INFO L413 NwaCegarLoop]: 3197 mSDtfsCounter, 3721 mSDsluCounter, 6367 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3736 SdHoareTripleChecker+Valid, 9564 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 14:11:58,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3736 Valid, 9564 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 14:11:58,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245213 states. [2022-12-14 14:12:14,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245213 to 245211. [2022-12-14 14:12:14,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245211 states, 209320 states have (on average 1.3628941333842919) internal successors, (285281), 209809 states have internal predecessors, (285281), 21593 states have call successors, (21593), 14296 states have call predecessors, (21593), 14296 states have return successors, (21593), 21106 states have call predecessors, (21593), 21593 states have call successors, (21593) [2022-12-14 14:12:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245211 states to 245211 states and 328467 transitions. [2022-12-14 14:12:15,154 INFO L78 Accepts]: Start accepts. Automaton has 245211 states and 328467 transitions. Word has length 154 [2022-12-14 14:12:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:12:15,154 INFO L495 AbstractCegarLoop]: Abstraction has 245211 states and 328467 transitions. [2022-12-14 14:12:15,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:12:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 245211 states and 328467 transitions. [2022-12-14 14:12:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:12:15,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:12:15,605 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:12:15,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 14:12:15,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 14:12:15,806 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:12:15,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:12:15,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1609650959, now seen corresponding path program 1 times [2022-12-14 14:12:15,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:12:15,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115511096] [2022-12-14 14:12:15,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:12:15,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:12:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:12:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 49 proven. 17 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 14:12:15,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:12:15,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115511096] [2022-12-14 14:12:15,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115511096] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:12:15,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080838493] [2022-12-14 14:12:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:12:15,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:12:15,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:12:15,939 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:12:15,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 14:12:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:12:16,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 14:12:16,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:12:16,088 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 14:12:16,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:12:16,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080838493] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:12:16,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:12:16,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 14:12:16,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975192992] [2022-12-14 14:12:16,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:12:16,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:12:16,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:12:16,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:12:16,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:12:16,090 INFO L87 Difference]: Start difference. First operand 245211 states and 328467 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:12:35,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:12:35,999 INFO L93 Difference]: Finished difference Result 459917 states and 618184 transitions. [2022-12-14 14:12:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:12:35,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 156 [2022-12-14 14:12:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:12:36,849 INFO L225 Difference]: With dead ends: 459917 [2022-12-14 14:12:36,849 INFO L226 Difference]: Without dead ends: 287955 [2022-12-14 14:12:37,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 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 14:12:37,090 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3382 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3382 SdHoareTripleChecker+Valid, 3268 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:12:37,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3382 Valid, 3268 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:12:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287955 states. [2022-12-14 14:12:56,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287955 to 285623. [2022-12-14 14:12:56,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285623 states, 247429 states have (on average 1.338755764279854) internal successors, (331247), 247918 states have internal predecessors, (331247), 22015 states have call successors, (22015), 16177 states have call predecessors, (22015), 16177 states have return successors, (23603), 21528 states have call predecessors, (23603), 22015 states have call successors, (23603) [2022-12-14 14:12:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285623 states to 285623 states and 376865 transitions. [2022-12-14 14:12:57,477 INFO L78 Accepts]: Start accepts. Automaton has 285623 states and 376865 transitions. Word has length 156 [2022-12-14 14:12:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:12:57,477 INFO L495 AbstractCegarLoop]: Abstraction has 285623 states and 376865 transitions. [2022-12-14 14:12:57,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:12:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 285623 states and 376865 transitions. [2022-12-14 14:12:57,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 14:12:57,816 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:12:57,817 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:12:57,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 14:12:58,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:12:58,018 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:12:58,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:12:58,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1278456905, now seen corresponding path program 1 times [2022-12-14 14:12:58,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:12:58,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935062762] [2022-12-14 14:12:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:12:58,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:12:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:12:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 56 proven. 26 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 14:12:58,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:12:58,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935062762] [2022-12-14 14:12:58,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935062762] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:12:58,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656238015] [2022-12-14 14:12:58,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:12:58,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:12:58,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:12:58,201 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:12:58,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 14:12:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:12:58,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 14:12:58,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:12:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:12:58,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:12:58,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656238015] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:12:58,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:12:58,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-12-14 14:12:58,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380171027] [2022-12-14 14:12:58,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:12:58,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:12:58,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:12:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:12:58,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:12:58,349 INFO L87 Difference]: Start difference. First operand 285623 states and 376865 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 14:13:24,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:13:24,235 INFO L93 Difference]: Finished difference Result 566249 states and 749009 transitions. [2022-12-14 14:13:24,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:13:24,235 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 158 [2022-12-14 14:13:24,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:13:25,174 INFO L225 Difference]: With dead ends: 566249 [2022-12-14 14:13:25,174 INFO L226 Difference]: Without dead ends: 367329 [2022-12-14 14:13:25,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:13:25,439 INFO L413 NwaCegarLoop]: 3307 mSDtfsCounter, 290 mSDsluCounter, 9480 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 12787 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 14:13:25,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 12787 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1117 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 14:13:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367329 states. [2022-12-14 14:13:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367329 to 347661. [2022-12-14 14:13:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347661 states, 300069 states have (on average 1.3255784502897667) internal successors, (397765), 300234 states have internal predecessors, (397765), 27913 states have call successors, (27913), 20293 states have call predecessors, (27913), 19677 states have return successors, (30311), 27134 states have call predecessors, (30311), 27913 states have call successors, (30311) [2022-12-14 14:13:51,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347661 states to 347661 states and 455989 transitions. [2022-12-14 14:13:51,854 INFO L78 Accepts]: Start accepts. Automaton has 347661 states and 455989 transitions. Word has length 158 [2022-12-14 14:13:51,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:13:51,854 INFO L495 AbstractCegarLoop]: Abstraction has 347661 states and 455989 transitions. [2022-12-14 14:13:51,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 14:13:51,854 INFO L276 IsEmpty]: Start isEmpty. Operand 347661 states and 455989 transitions. [2022-12-14 14:13:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-14 14:13:52,169 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:13:52,169 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:13:52,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-14 14:13:52,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 14:13:52,370 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:13:52,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:13:52,371 INFO L85 PathProgramCache]: Analyzing trace with hash -999267709, now seen corresponding path program 1 times [2022-12-14 14:13:52,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:13:52,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598970038] [2022-12-14 14:13:52,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:13:52,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:13:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:13:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 14:13:52,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:13:52,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598970038] [2022-12-14 14:13:52,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598970038] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:13:52,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984211] [2022-12-14 14:13:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:13:52,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:13:52,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:13:52,446 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:13:52,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 14:13:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:13:52,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:13:52,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:13:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-12-14 14:13:52,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:13:52,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984211] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:13:52,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:13:52,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 14:13:52,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121165793] [2022-12-14 14:13:52,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:13:52,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:13:52,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:13:52,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:13:52,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:13:52,593 INFO L87 Difference]: Start difference. First operand 347661 states and 455989 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:14:23,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:14:23,296 INFO L93 Difference]: Finished difference Result 662967 states and 878109 transitions. [2022-12-14 14:14:23,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:14:23,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 154 [2022-12-14 14:14:23,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:14:24,520 INFO L225 Difference]: With dead ends: 662967 [2022-12-14 14:14:24,520 INFO L226 Difference]: Without dead ends: 430625 [2022-12-14 14:14:24,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:14:24,858 INFO L413 NwaCegarLoop]: 3290 mSDtfsCounter, 92 mSDsluCounter, 3206 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6496 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:14:24,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 6496 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:14:25,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430625 states. [2022-12-14 14:14:52,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430625 to 385461. [2022-12-14 14:14:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385461 states, 334413 states have (on average 1.338970075924082) internal successors, (447769), 334578 states have internal predecessors, (447769), 29641 states have call successors, (29641), 22021 states have call predecessors, (29641), 21405 states have return successors, (32039), 28862 states have call predecessors, (32039), 29641 states have call successors, (32039) [2022-12-14 14:14:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385461 states to 385461 states and 509449 transitions. [2022-12-14 14:14:54,145 INFO L78 Accepts]: Start accepts. Automaton has 385461 states and 509449 transitions. Word has length 154 [2022-12-14 14:14:54,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:14:54,146 INFO L495 AbstractCegarLoop]: Abstraction has 385461 states and 509449 transitions. [2022-12-14 14:14:54,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:14:54,146 INFO L276 IsEmpty]: Start isEmpty. Operand 385461 states and 509449 transitions. [2022-12-14 14:14:54,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:14:54,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:14:54,727 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 14:14:54,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 14:14:54,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:14:54,929 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:14:54,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:14:54,930 INFO L85 PathProgramCache]: Analyzing trace with hash 351486041, now seen corresponding path program 1 times [2022-12-14 14:14:54,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:14:54,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615282599] [2022-12-14 14:14:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:14:54,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:14:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:14:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 42 proven. 11 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 14:14:55,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:14:55,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615282599] [2022-12-14 14:14:55,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615282599] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:14:55,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567654778] [2022-12-14 14:14:55,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:14:55,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:14:55,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:14:55,007 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:14:55,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 14:14:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:14:55,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:14:55,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:14:55,134 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:14:55,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:14:55,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567654778] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:14:55,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:14:55,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-14 14:14:55,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926135746] [2022-12-14 14:14:55,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:14:55,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:14:55,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:14:55,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:14:55,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:14:55,136 INFO L87 Difference]: Start difference. First operand 385461 states and 509449 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:15:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:15:24,000 INFO L93 Difference]: Finished difference Result 656415 states and 881189 transitions. [2022-12-14 14:15:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:15:24,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 156 [2022-12-14 14:15:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:15:25,050 INFO L225 Difference]: With dead ends: 656415 [2022-12-14 14:15:25,050 INFO L226 Difference]: Without dead ends: 386111 [2022-12-14 14:15:25,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 157 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 14:15:25,576 INFO L413 NwaCegarLoop]: 3314 mSDtfsCounter, 132 mSDsluCounter, 3190 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 6504 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:15:25,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 6504 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:15:25,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386111 states. [2022-12-14 14:15:54,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386111 to 383301. [2022-12-14 14:15:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383301 states, 332253 states have (on average 1.3203703202077934) internal successors, (438697), 332418 states have internal predecessors, (438697), 29641 states have call successors, (29641), 22021 states have call predecessors, (29641), 21405 states have return successors, (32039), 28862 states have call predecessors, (32039), 29641 states have call successors, (32039) [2022-12-14 14:15:56,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383301 states to 383301 states and 500377 transitions. [2022-12-14 14:15:56,160 INFO L78 Accepts]: Start accepts. Automaton has 383301 states and 500377 transitions. Word has length 156 [2022-12-14 14:15:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:15:56,161 INFO L495 AbstractCegarLoop]: Abstraction has 383301 states and 500377 transitions. [2022-12-14 14:15:56,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:15:56,161 INFO L276 IsEmpty]: Start isEmpty. Operand 383301 states and 500377 transitions. [2022-12-14 14:15:56,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 14:15:56,569 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:15:56,569 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 14:15:56,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 14:15:56,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 14:15:56,770 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:15:56,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:15:56,771 INFO L85 PathProgramCache]: Analyzing trace with hash 894045787, now seen corresponding path program 1 times [2022-12-14 14:15:56,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:15:56,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399875586] [2022-12-14 14:15:56,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:15:56,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:15:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:15:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 53 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 14:15:57,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:15:57,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399875586] [2022-12-14 14:15:57,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399875586] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:15:57,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909294583] [2022-12-14 14:15:57,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:15:57,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:15:57,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:15:57,123 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:15:57,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 14:15:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:15:57,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 14:15:57,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:15:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 14:15:57,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:15:57,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909294583] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:15:57,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:15:57,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 14:15:57,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589773206] [2022-12-14 14:15:57,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:15:57,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:15:57,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:15:57,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:15:57,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:15:57,300 INFO L87 Difference]: Start difference. First operand 383301 states and 500377 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:16:29,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:16:29,698 INFO L93 Difference]: Finished difference Result 699411 states and 918734 transitions. [2022-12-14 14:16:29,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:16:29,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 156 [2022-12-14 14:16:29,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:16:30,860 INFO L225 Difference]: With dead ends: 699411 [2022-12-14 14:16:30,860 INFO L226 Difference]: Without dead ends: 432347 [2022-12-14 14:16:31,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 158 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 14:16:31,221 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3387 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3387 SdHoareTripleChecker+Valid, 3268 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:16:31,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3387 Valid, 3268 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:16:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432347 states. [2022-12-14 14:17:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432347 to 425847. [2022-12-14 14:17:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425847 states, 371985 states have (on average 1.304297216285603) internal successors, (485179), 372636 states have internal predecessors, (485179), 30145 states have call successors, (30145), 23821 states have call predecessors, (30145), 23715 states have return successors, (34423), 29390 states have call predecessors, (34423), 30145 states have call successors, (34423) [2022-12-14 14:17:05,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425847 states to 425847 states and 549747 transitions. [2022-12-14 14:17:05,360 INFO L78 Accepts]: Start accepts. Automaton has 425847 states and 549747 transitions. Word has length 156 [2022-12-14 14:17:05,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:17:05,361 INFO L495 AbstractCegarLoop]: Abstraction has 425847 states and 549747 transitions. [2022-12-14 14:17:05,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:17:05,361 INFO L276 IsEmpty]: Start isEmpty. Operand 425847 states and 549747 transitions. [2022-12-14 14:17:05,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-14 14:17:05,961 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:17:05,961 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:17:05,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-14 14:17:06,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 14:17:06,162 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:17:06,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:17:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash 293073923, now seen corresponding path program 1 times [2022-12-14 14:17:06,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:17:06,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422336681] [2022-12-14 14:17:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:17:06,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:17:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:17:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-12-14 14:17:06,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:17:06,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422336681] [2022-12-14 14:17:06,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422336681] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:17:06,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836855252] [2022-12-14 14:17:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:17:06,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:17:06,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:17:06,321 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:17:06,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea31605-81a1-4fb5-bf1b-f4e882703f83/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 14:17:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:17:06,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 14:17:06,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:17:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 80 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:17:06,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:17:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2022-12-14 14:17:08,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836855252] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:17:08,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [647004862] [2022-12-14 14:17:08,080 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2022-12-14 14:17:08,080 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:17:08,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:17:08,088 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:17:08,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:19:32,349 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 251 for LOIs