./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9 --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 2b9ed7c85c1e945b329b46ea2facde1ef0195f46b3e9e9585453dabdeb816de5 --- 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-6b4ec56 [2022-11-20 20:25:31,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 20:25:31,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 20:25:31,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 20:25:31,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 20:25:31,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 20:25:31,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 20:25:31,353 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 20:25:31,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 20:25:31,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 20:25:31,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 20:25:31,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 20:25:31,360 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 20:25:31,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 20:25:31,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 20:25:31,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 20:25:31,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 20:25:31,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 20:25:31,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 20:25:31,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 20:25:31,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 20:25:31,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 20:25:31,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 20:25:31,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 20:25:31,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 20:25:31,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 20:25:31,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 20:25:31,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 20:25:31,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 20:25:31,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 20:25:31,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 20:25:31,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 20:25:31,388 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 20:25:31,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 20:25:31,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 20:25:31,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 20:25:31,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 20:25:31,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 20:25:31,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 20:25:31,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 20:25:31,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 20:25:31,396 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 20:25:31,424 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 20:25:31,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 20:25:31,425 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 20:25:31,425 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 20:25:31,426 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 20:25:31,426 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 20:25:31,427 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 20:25:31,427 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 20:25:31,427 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 20:25:31,428 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 20:25:31,428 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 20:25:31,428 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 20:25:31,428 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 20:25:31,429 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 20:25:31,429 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 20:25:31,429 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 20:25:31,430 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 20:25:31,430 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 20:25:31,431 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 20:25:31,431 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 20:25:31,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 20:25:31,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 20:25:31,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 20:25:31,432 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 20:25:31,432 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 20:25:31,433 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 20:25:31,433 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 20:25:31,433 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 20:25:31,433 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 20:25:31,434 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 20:25:31,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 20:25:31,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 20:25:31,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:25:31,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 20:25:31,435 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 20:25:31,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 20:25:31,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 20:25:31,436 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 20:25:31,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 20:25:31,436 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 20:25:31,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 20:25:31,437 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_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b9ed7c85c1e945b329b46ea2facde1ef0195f46b3e9e9585453dabdeb816de5 [2022-11-20 20:25:31,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 20:25:31,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 20:25:31,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 20:25:31,838 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 20:25:31,839 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 20:25:31,840 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c [2022-11-20 20:25:35,246 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 20:25:35,497 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 20:25:35,497 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c [2022-11-20 20:25:35,511 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/data/05285a43b/1cac571a0aaa4f4bbe26c0e93acd35a3/FLAGa92058322 [2022-11-20 20:25:35,529 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/data/05285a43b/1cac571a0aaa4f4bbe26c0e93acd35a3 [2022-11-20 20:25:35,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 20:25:35,535 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 20:25:35,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 20:25:35,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 20:25:35,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 20:25:35,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:25:35" (1/1) ... [2022-11-20 20:25:35,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15d594fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:25:35, skipping insertion in model container [2022-11-20 20:25:35,544 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:25:35" (1/1) ... [2022-11-20 20:25:35,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 20:25:35,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 20:25:35,852 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_c295ecbd-2210-4584-acce-6ebe9c6d6150/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c[911,924] [2022-11-20 20:25:35,928 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_c295ecbd-2210-4584-acce-6ebe9c6d6150/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c[8416,8429] [2022-11-20 20:25:36,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:25:36,066 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 20:25:36,080 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_c295ecbd-2210-4584-acce-6ebe9c6d6150/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c[911,924] [2022-11-20 20:25:36,117 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_c295ecbd-2210-4584-acce-6ebe9c6d6150/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.05.cil-1.c[8416,8429] [2022-11-20 20:25:36,204 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 20:25:36,233 INFO L208 MainTranslator]: Completed translation [2022-11-20 20:25:36,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:25:36 WrapperNode [2022-11-20 20:25:36,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 20:25:36,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 20:25:36,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 20:25:36,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 20:25:36,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:25:36" (1/1) ... [2022-11-20 20:25:36,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:25:36" (1/1) ... [2022-11-20 20:25:36,350 INFO L138 Inliner]: procedures = 65, calls = 76, calls flagged for inlining = 34, calls inlined = 34, statements flattened = 672 [2022-11-20 20:25:36,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 20:25:36,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 20:25:36,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 20:25:36,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 20:25:36,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:25:36" (1/1) ... [2022-11-20 20:25:36,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:25:36" (1/1) ... [2022-11-20 20:25:36,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:25:36" (1/1) ... [2022-11-20 20:25:36,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:25:36" (1/1) ... [2022-11-20 20:25:36,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:25:36" (1/1) ... [2022-11-20 20:25:36,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:25:36" (1/1) ... [2022-11-20 20:25:36,427 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:25:36" (1/1) ... [2022-11-20 20:25:36,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:25:36" (1/1) ... [2022-11-20 20:25:36,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 20:25:36,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 20:25:36,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 20:25:36,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 20:25:36,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:25:36" (1/1) ... [2022-11-20 20:25:36,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 20:25:36,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:36,493 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 20:25:36,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 20:25:36,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 20:25:36,539 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-20 20:25:36,539 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-20 20:25:36,539 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-20 20:25:36,539 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-20 20:25:36,539 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-20 20:25:36,539 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-20 20:25:36,539 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-20 20:25:36,540 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-20 20:25:36,540 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-20 20:25:36,540 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-20 20:25:36,540 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-20 20:25:36,540 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-20 20:25:36,540 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-20 20:25:36,541 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-20 20:25:36,541 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-20 20:25:36,541 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-20 20:25:36,541 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-20 20:25:36,541 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-20 20:25:36,541 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-20 20:25:36,542 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-20 20:25:36,542 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-20 20:25:36,542 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-20 20:25:36,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 20:25:36,542 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-20 20:25:36,542 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-20 20:25:36,542 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-20 20:25:36,543 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-20 20:25:36,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 20:25:36,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 20:25:36,543 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-20 20:25:36,543 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-20 20:25:36,655 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 20:25:36,658 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 20:25:37,416 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-11-20 20:25:37,420 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-11-20 20:25:37,531 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 20:25:37,903 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 20:25:37,903 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-11-20 20:25:37,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:25:37 BoogieIcfgContainer [2022-11-20 20:25:37,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 20:25:37,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 20:25:37,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 20:25:37,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 20:25:37,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:25:35" (1/3) ... [2022-11-20 20:25:37,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5c9cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:25:37, skipping insertion in model container [2022-11-20 20:25:37,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:25:36" (2/3) ... [2022-11-20 20:25:37,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b5c9cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:25:37, skipping insertion in model container [2022-11-20 20:25:37,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:25:37" (3/3) ... [2022-11-20 20:25:37,915 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.05.cil-1.c [2022-11-20 20:25:37,935 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 20:25:37,935 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 20:25:38,015 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 20:25:38,024 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;@5ac09d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 20:25:38,024 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 20:25:38,033 INFO L276 IsEmpty]: Start isEmpty. Operand has 190 states, 138 states have (on average 1.5144927536231885) internal successors, (209), 144 states have internal predecessors, (209), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-20 20:25:38,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 20:25:38,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:38,049 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] [2022-11-20 20:25:38,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:38,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:38,057 INFO L85 PathProgramCache]: Analyzing trace with hash 301180781, now seen corresponding path program 1 times [2022-11-20 20:25:38,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:38,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277341217] [2022-11-20 20:25:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:38,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:25:38,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:38,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277341217] [2022-11-20 20:25:38,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277341217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:38,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:25:38,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 20:25:38,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031259965] [2022-11-20 20:25:38,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:38,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:25:38,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:38,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:25:38,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 20:25:38,536 INFO L87 Difference]: Start difference. First operand has 190 states, 138 states have (on average 1.5144927536231885) internal successors, (209), 144 states have internal predecessors, (209), 35 states have call successors, (35), 14 states have call predecessors, (35), 14 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-20 20:25:39,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:39,148 INFO L93 Difference]: Finished difference Result 503 states and 736 transitions. [2022-11-20 20:25:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 20:25:39,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-11-20 20:25:39,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:39,172 INFO L225 Difference]: With dead ends: 503 [2022-11-20 20:25:39,173 INFO L226 Difference]: Without dead ends: 314 [2022-11-20 20:25:39,181 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 [2022-11-20 20:25:39,185 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 331 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:39,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 510 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 20:25:39,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-20 20:25:39,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 303. [2022-11-20 20:25:39,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 219 states have (on average 1.4109589041095891) internal successors, (309), 223 states have internal predecessors, (309), 55 states have call successors, (55), 28 states have call predecessors, (55), 27 states have return successors, (56), 53 states have call predecessors, (56), 53 states have call successors, (56) [2022-11-20 20:25:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 420 transitions. [2022-11-20 20:25:39,299 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 420 transitions. Word has length 44 [2022-11-20 20:25:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:39,300 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 420 transitions. [2022-11-20 20:25:39,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-20 20:25:39,301 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 420 transitions. [2022-11-20 20:25:39,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 20:25:39,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:39,306 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] [2022-11-20 20:25:39,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 20:25:39,307 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:39,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:39,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1834054908, now seen corresponding path program 1 times [2022-11-20 20:25:39,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:39,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98071615] [2022-11-20 20:25:39,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:39,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:25:39,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:39,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98071615] [2022-11-20 20:25:39,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98071615] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:39,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:25:39,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 20:25:39,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246670949] [2022-11-20 20:25:39,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:39,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:25:39,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:39,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:25:39,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:39,484 INFO L87 Difference]: Start difference. First operand 303 states and 420 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-20 20:25:40,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:40,560 INFO L93 Difference]: Finished difference Result 840 states and 1143 transitions. [2022-11-20 20:25:40,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:25:40,561 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-20 20:25:40,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:40,564 INFO L225 Difference]: With dead ends: 840 [2022-11-20 20:25:40,564 INFO L226 Difference]: Without dead ends: 374 [2022-11-20 20:25:40,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:25:40,567 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 750 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:40,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [758 Valid, 919 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 20:25:40,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-20 20:25:40,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 289. [2022-11-20 20:25:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 205 states have (on average 1.3463414634146342) internal successors, (276), 209 states have internal predecessors, (276), 55 states have call successors, (55), 28 states have call predecessors, (55), 27 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-11-20 20:25:40,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 384 transitions. [2022-11-20 20:25:40,597 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 384 transitions. Word has length 45 [2022-11-20 20:25:40,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:40,598 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 384 transitions. [2022-11-20 20:25:40,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-20 20:25:40,598 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 384 transitions. [2022-11-20 20:25:40,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 20:25:40,600 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:40,600 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] [2022-11-20 20:25:40,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 20:25:40,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:40,601 INFO L85 PathProgramCache]: Analyzing trace with hash 174691287, now seen corresponding path program 1 times [2022-11-20 20:25:40,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:40,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868156801] [2022-11-20 20:25:40,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:40,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:25:40,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:40,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868156801] [2022-11-20 20:25:40,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868156801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:40,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:25:40,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 20:25:40,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683376466] [2022-11-20 20:25:40,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:40,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 20:25:40,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:40,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 20:25:40,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:25:40,887 INFO L87 Difference]: Start difference. First operand 289 states and 384 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-20 20:25:41,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:41,769 INFO L93 Difference]: Finished difference Result 591 states and 752 transitions. [2022-11-20 20:25:41,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 20:25:41,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-20 20:25:41,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:41,774 INFO L225 Difference]: With dead ends: 591 [2022-11-20 20:25:41,774 INFO L226 Difference]: Without dead ends: 417 [2022-11-20 20:25:41,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 20:25:41,783 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 391 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:41,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 752 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 20:25:41,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-11-20 20:25:41,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 391. [2022-11-20 20:25:41,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 273 states have (on average 1.3113553113553114) internal successors, (358), 277 states have internal predecessors, (358), 75 states have call successors, (75), 42 states have call predecessors, (75), 41 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2022-11-20 20:25:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 506 transitions. [2022-11-20 20:25:41,844 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 506 transitions. Word has length 46 [2022-11-20 20:25:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:41,845 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 506 transitions. [2022-11-20 20:25:41,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-20 20:25:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 506 transitions. [2022-11-20 20:25:41,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 20:25:41,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:41,853 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] [2022-11-20 20:25:41,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 20:25:41,853 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:41,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:41,855 INFO L85 PathProgramCache]: Analyzing trace with hash -877904287, now seen corresponding path program 1 times [2022-11-20 20:25:41,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:41,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607590718] [2022-11-20 20:25:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:41,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:25:41,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:41,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607590718] [2022-11-20 20:25:41,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607590718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:41,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:25:41,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:25:41,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073284053] [2022-11-20 20:25:41,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:41,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:25:41,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:41,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:25:41,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:25:41,912 INFO L87 Difference]: Start difference. First operand 391 states and 506 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 20:25:42,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:42,018 INFO L93 Difference]: Finished difference Result 656 states and 842 transitions. [2022-11-20 20:25:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:25:42,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-20 20:25:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:42,020 INFO L225 Difference]: With dead ends: 656 [2022-11-20 20:25:42,021 INFO L226 Difference]: Without dead ends: 110 [2022-11-20 20:25:42,022 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 [2022-11-20 20:25:42,023 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 231 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:42,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 203 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:25:42,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-20 20:25:42,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-11-20 20:25:42,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 85 states have internal predecessors, (123), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-20 20:25:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 161 transitions. [2022-11-20 20:25:42,044 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 161 transitions. Word has length 47 [2022-11-20 20:25:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:42,046 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 161 transitions. [2022-11-20 20:25:42,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 20:25:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 161 transitions. [2022-11-20 20:25:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 20:25:42,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:42,052 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] [2022-11-20 20:25:42,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 20:25:42,052 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:42,053 INFO L85 PathProgramCache]: Analyzing trace with hash 126691969, now seen corresponding path program 1 times [2022-11-20 20:25:42,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:42,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852993072] [2022-11-20 20:25:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:42,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 20:25:42,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:42,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852993072] [2022-11-20 20:25:42,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852993072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:42,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:25:42,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 20:25:42,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65790188] [2022-11-20 20:25:42,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:42,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 20:25:42,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:42,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 20:25:42,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 20:25:42,149 INFO L87 Difference]: Start difference. First operand 110 states and 161 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-11-20 20:25:42,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:42,821 INFO L93 Difference]: Finished difference Result 603 states and 941 transitions. [2022-11-20 20:25:42,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 20:25:42,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 46 [2022-11-20 20:25:42,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:42,826 INFO L225 Difference]: With dead ends: 603 [2022-11-20 20:25:42,826 INFO L226 Difference]: Without dead ends: 499 [2022-11-20 20:25:42,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:25:42,828 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 671 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:42,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 691 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 20:25:42,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-20 20:25:42,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 488. [2022-11-20 20:25:42,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 381 states have (on average 1.4619422572178478) internal successors, (557), 385 states have internal predecessors, (557), 76 states have call successors, (76), 30 states have call predecessors, (76), 30 states have return successors, (110), 73 states have call predecessors, (110), 76 states have call successors, (110) [2022-11-20 20:25:42,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 743 transitions. [2022-11-20 20:25:42,896 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 743 transitions. Word has length 46 [2022-11-20 20:25:42,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:42,897 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 743 transitions. [2022-11-20 20:25:42,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2022-11-20 20:25:42,897 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 743 transitions. [2022-11-20 20:25:42,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 20:25:42,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:42,901 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:25:42,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 20:25:42,902 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:42,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:42,902 INFO L85 PathProgramCache]: Analyzing trace with hash 518975534, now seen corresponding path program 1 times [2022-11-20 20:25:42,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:42,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956238123] [2022-11-20 20:25:42,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:42,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:43,094 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 20:25:43,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:43,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956238123] [2022-11-20 20:25:43,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956238123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:25:43,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505241557] [2022-11-20 20:25:43,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:43,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:43,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:43,099 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:43,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 20:25:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:43,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:25:43,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 20:25:43,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:25:43,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505241557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:43,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:25:43,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 20:25:43,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018213166] [2022-11-20 20:25:43,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:43,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:25:43,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:43,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:25:43,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:43,367 INFO L87 Difference]: Start difference. First operand 488 states and 743 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 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) [2022-11-20 20:25:43,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:43,541 INFO L93 Difference]: Finished difference Result 1436 states and 2248 transitions. [2022-11-20 20:25:43,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:25:43,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 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 87 [2022-11-20 20:25:43,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:43,547 INFO L225 Difference]: With dead ends: 1436 [2022-11-20 20:25:43,548 INFO L226 Difference]: Without dead ends: 954 [2022-11-20 20:25:43,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:43,551 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 130 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:43,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 265 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:25:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-11-20 20:25:43,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 947. [2022-11-20 20:25:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 743 states have (on average 1.4535666218034993) internal successors, (1080), 750 states have internal predecessors, (1080), 143 states have call successors, (143), 60 states have call predecessors, (143), 60 states have return successors, (207), 137 states have call predecessors, (207), 143 states have call successors, (207) [2022-11-20 20:25:43,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1430 transitions. [2022-11-20 20:25:43,659 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1430 transitions. Word has length 87 [2022-11-20 20:25:43,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:43,659 INFO L495 AbstractCegarLoop]: Abstraction has 947 states and 1430 transitions. [2022-11-20 20:25:43,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 2 states have internal predecessors, (60), 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) [2022-11-20 20:25:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1430 transitions. [2022-11-20 20:25:43,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 20:25:43,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:43,663 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:25:43,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 20:25:43,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 20:25:43,869 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:43,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:43,870 INFO L85 PathProgramCache]: Analyzing trace with hash 915455212, now seen corresponding path program 1 times [2022-11-20 20:25:43,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:43,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67125386] [2022-11-20 20:25:43,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:43,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 20:25:44,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:44,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67125386] [2022-11-20 20:25:44,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67125386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:25:44,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326695270] [2022-11-20 20:25:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:44,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:44,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:44,071 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:44,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 20:25:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:44,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:25:44,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 20:25:44,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:25:44,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326695270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:44,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:25:44,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 20:25:44,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406465227] [2022-11-20 20:25:44,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:44,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:25:44,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:44,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:25:44,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:44,324 INFO L87 Difference]: Start difference. First operand 947 states and 1430 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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) [2022-11-20 20:25:44,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:44,569 INFO L93 Difference]: Finished difference Result 2798 states and 4338 transitions. [2022-11-20 20:25:44,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:25:44,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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 87 [2022-11-20 20:25:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:44,583 INFO L225 Difference]: With dead ends: 2798 [2022-11-20 20:25:44,583 INFO L226 Difference]: Without dead ends: 1857 [2022-11-20 20:25:44,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:44,592 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 133 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:44,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 265 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:25:44,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1857 states. [2022-11-20 20:25:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1857 to 1845. [2022-11-20 20:25:44,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1452 states have (on average 1.443526170798898) internal successors, (2096), 1465 states have internal predecessors, (2096), 272 states have call successors, (272), 120 states have call predecessors, (272), 120 states have return successors, (392), 260 states have call predecessors, (392), 272 states have call successors, (392) [2022-11-20 20:25:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 2760 transitions. [2022-11-20 20:25:44,802 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 2760 transitions. Word has length 87 [2022-11-20 20:25:44,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:44,803 INFO L495 AbstractCegarLoop]: Abstraction has 1845 states and 2760 transitions. [2022-11-20 20:25:44,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 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) [2022-11-20 20:25:44,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 2760 transitions. [2022-11-20 20:25:44,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 20:25:44,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:44,812 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:25:44,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 20:25:45,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 20:25:45,019 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:45,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:45,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1281478510, now seen corresponding path program 1 times [2022-11-20 20:25:45,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:45,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096706361] [2022-11-20 20:25:45,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:45,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 20:25:45,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:45,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096706361] [2022-11-20 20:25:45,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096706361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:45,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:25:45,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:25:45,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838775282] [2022-11-20 20:25:45,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:45,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:25:45,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:45,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:25:45,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:25:45,116 INFO L87 Difference]: Start difference. First operand 1845 states and 2760 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2022-11-20 20:25:45,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:45,366 INFO L93 Difference]: Finished difference Result 3743 states and 5729 transitions. [2022-11-20 20:25:45,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:25:45,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 87 [2022-11-20 20:25:45,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:45,383 INFO L225 Difference]: With dead ends: 3743 [2022-11-20 20:25:45,384 INFO L226 Difference]: Without dead ends: 2269 [2022-11-20 20:25:45,389 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 [2022-11-20 20:25:45,393 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 65 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:45,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 335 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:25:45,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2022-11-20 20:25:45,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2089. [2022-11-20 20:25:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 1680 states have (on average 1.4785714285714286) internal successors, (2484), 1693 states have internal predecessors, (2484), 280 states have call successors, (280), 128 states have call predecessors, (280), 128 states have return successors, (400), 268 states have call predecessors, (400), 280 states have call successors, (400) [2022-11-20 20:25:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 3164 transitions. [2022-11-20 20:25:45,617 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 3164 transitions. Word has length 87 [2022-11-20 20:25:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:45,618 INFO L495 AbstractCegarLoop]: Abstraction has 2089 states and 3164 transitions. [2022-11-20 20:25:45,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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) [2022-11-20 20:25:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 3164 transitions. [2022-11-20 20:25:45,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-20 20:25:45,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:45,626 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 20:25:45,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 20:25:45,626 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:45,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:45,626 INFO L85 PathProgramCache]: Analyzing trace with hash 199797023, now seen corresponding path program 1 times [2022-11-20 20:25:45,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:45,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443102080] [2022-11-20 20:25:45,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:45,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 20:25:45,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:45,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443102080] [2022-11-20 20:25:45,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443102080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:45,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:25:45,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:25:45,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25748697] [2022-11-20 20:25:45,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:45,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:25:45,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:45,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:25:45,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:25:45,706 INFO L87 Difference]: Start difference. First operand 2089 states and 3164 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-20 20:25:46,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:46,145 INFO L93 Difference]: Finished difference Result 6166 states and 9533 transitions. [2022-11-20 20:25:46,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:25:46,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 116 [2022-11-20 20:25:46,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:46,168 INFO L225 Difference]: With dead ends: 6166 [2022-11-20 20:25:46,168 INFO L226 Difference]: Without dead ends: 4083 [2022-11-20 20:25:46,176 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 [2022-11-20 20:25:46,177 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 126 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:46,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 267 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:25:46,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4083 states. [2022-11-20 20:25:46,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4083 to 4053. [2022-11-20 20:25:46,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 3260 states have (on average 1.463803680981595) internal successors, (4772), 3285 states have internal predecessors, (4772), 536 states have call successors, (536), 256 states have call predecessors, (536), 256 states have return successors, (760), 512 states have call predecessors, (760), 536 states have call successors, (760) [2022-11-20 20:25:46,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 6068 transitions. [2022-11-20 20:25:46,576 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 6068 transitions. Word has length 116 [2022-11-20 20:25:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:46,577 INFO L495 AbstractCegarLoop]: Abstraction has 4053 states and 6068 transitions. [2022-11-20 20:25:46,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-20 20:25:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 6068 transitions. [2022-11-20 20:25:46,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-20 20:25:46,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:46,591 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 20:25:46,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 20:25:46,591 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:46,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:46,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1430016577, now seen corresponding path program 1 times [2022-11-20 20:25:46,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:46,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377488795] [2022-11-20 20:25:46,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:46,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-20 20:25:46,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:46,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377488795] [2022-11-20 20:25:46,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377488795] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:46,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 20:25:46,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 20:25:46,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721246555] [2022-11-20 20:25:46,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:46,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:25:46,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:46,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:25:46,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 20:25:46,682 INFO L87 Difference]: Start difference. First operand 4053 states and 6068 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-20 20:25:47,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:47,383 INFO L93 Difference]: Finished difference Result 11970 states and 18269 transitions. [2022-11-20 20:25:47,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:25:47,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 116 [2022-11-20 20:25:47,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:47,435 INFO L225 Difference]: With dead ends: 11970 [2022-11-20 20:25:47,435 INFO L226 Difference]: Without dead ends: 7923 [2022-11-20 20:25:47,457 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 [2022-11-20 20:25:47,458 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 129 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:47,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 267 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:25:47,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7923 states. [2022-11-20 20:25:48,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7923 to 7865. [2022-11-20 20:25:48,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 6324 states have (on average 1.4478178368121442) internal successors, (9156), 6373 states have internal predecessors, (9156), 1028 states have call successors, (1028), 512 states have call predecessors, (1028), 512 states have return successors, (1444), 980 states have call predecessors, (1444), 1028 states have call successors, (1444) [2022-11-20 20:25:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 11628 transitions. [2022-11-20 20:25:48,216 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 11628 transitions. Word has length 116 [2022-11-20 20:25:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:48,218 INFO L495 AbstractCegarLoop]: Abstraction has 7865 states and 11628 transitions. [2022-11-20 20:25:48,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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) [2022-11-20 20:25:48,218 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 11628 transitions. [2022-11-20 20:25:48,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-20 20:25:48,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:48,252 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, 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] [2022-11-20 20:25:48,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 20:25:48,252 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:48,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:48,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1687523156, now seen corresponding path program 1 times [2022-11-20 20:25:48,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:48,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174190272] [2022-11-20 20:25:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:48,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-20 20:25:48,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:48,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174190272] [2022-11-20 20:25:48,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174190272] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:25:48,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396155182] [2022-11-20 20:25:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:48,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:48,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:48,481 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:48,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 20:25:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:48,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 747 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:25:48,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 20:25:48,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:25:48,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396155182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:48,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:25:48,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 20:25:48,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473851386] [2022-11-20 20:25:48,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:48,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:25:48,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:48,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:25:48,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:48,769 INFO L87 Difference]: Start difference. First operand 7865 states and 11628 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2022-11-20 20:25:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:49,622 INFO L93 Difference]: Finished difference Result 14580 states and 21537 transitions. [2022-11-20 20:25:49,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:25:49,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 134 [2022-11-20 20:25:49,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:49,679 INFO L225 Difference]: With dead ends: 14580 [2022-11-20 20:25:49,680 INFO L226 Difference]: Without dead ends: 9922 [2022-11-20 20:25:49,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:49,703 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 123 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:49,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 184 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 20:25:49,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9922 states. [2022-11-20 20:25:50,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9922 to 9922. [2022-11-20 20:25:50,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9922 states, 8146 states have (on average 1.40265160815124) internal successors, (11426), 8195 states have internal predecessors, (11426), 1105 states have call successors, (1105), 669 states have call predecessors, (1105), 670 states have return successors, (1583), 1058 states have call predecessors, (1583), 1105 states have call successors, (1583) [2022-11-20 20:25:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9922 states to 9922 states and 14114 transitions. [2022-11-20 20:25:50,780 INFO L78 Accepts]: Start accepts. Automaton has 9922 states and 14114 transitions. Word has length 134 [2022-11-20 20:25:50,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:50,781 INFO L495 AbstractCegarLoop]: Abstraction has 9922 states and 14114 transitions. [2022-11-20 20:25:50,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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) [2022-11-20 20:25:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 9922 states and 14114 transitions. [2022-11-20 20:25:50,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-20 20:25:50,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:50,813 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:25:50,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 20:25:51,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:51,026 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:51,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:51,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1688469517, now seen corresponding path program 1 times [2022-11-20 20:25:51,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:51,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297545348] [2022-11-20 20:25:51,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:51,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-20 20:25:51,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:51,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297545348] [2022-11-20 20:25:51,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297545348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:25:51,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078402187] [2022-11-20 20:25:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:51,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:51,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:51,201 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:51,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 20:25:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:51,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:25:51,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 20:25:51,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:25:51,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078402187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:51,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:25:51,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 20:25:51,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752848094] [2022-11-20 20:25:51,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:51,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:25:51,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:51,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:25:51,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:51,455 INFO L87 Difference]: Start difference. First operand 9922 states and 14114 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2022-11-20 20:25:52,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:52,612 INFO L93 Difference]: Finished difference Result 18943 states and 27392 transitions. [2022-11-20 20:25:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:25:52,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 134 [2022-11-20 20:25:52,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:52,671 INFO L225 Difference]: With dead ends: 18943 [2022-11-20 20:25:52,671 INFO L226 Difference]: Without dead ends: 13845 [2022-11-20 20:25:52,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:25:52,687 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 96 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:52,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 362 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:25:52,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13845 states. [2022-11-20 20:25:53,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13845 to 11370. [2022-11-20 20:25:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11370 states, 9482 states have (on average 1.4404134148913732) internal successors, (13658), 9531 states have internal predecessors, (13658), 1161 states have call successors, (1161), 725 states have call predecessors, (1161), 726 states have return successors, (1639), 1114 states have call predecessors, (1639), 1161 states have call successors, (1639) [2022-11-20 20:25:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11370 states to 11370 states and 16458 transitions. [2022-11-20 20:25:53,788 INFO L78 Accepts]: Start accepts. Automaton has 11370 states and 16458 transitions. Word has length 134 [2022-11-20 20:25:53,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:53,788 INFO L495 AbstractCegarLoop]: Abstraction has 11370 states and 16458 transitions. [2022-11-20 20:25:53,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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) [2022-11-20 20:25:53,789 INFO L276 IsEmpty]: Start isEmpty. Operand 11370 states and 16458 transitions. [2022-11-20 20:25:53,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-20 20:25:53,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:53,829 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, 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] [2022-11-20 20:25:53,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 20:25:54,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 20:25:54,036 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:54,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:54,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1983233044, now seen corresponding path program 2 times [2022-11-20 20:25:54,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:54,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495463473] [2022-11-20 20:25:54,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:54,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:54,435 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 20:25:54,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:54,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495463473] [2022-11-20 20:25:54,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495463473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:25:54,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121744669] [2022-11-20 20:25:54,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 20:25:54,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:54,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:54,438 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:54,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 20:25:54,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-20 20:25:54,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 20:25:54,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:25:54,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 20:25:54,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:25:54,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121744669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:54,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:25:54,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 20:25:54,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841168167] [2022-11-20 20:25:54,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:54,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:25:54,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:54,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:25:54,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:25:54,706 INFO L87 Difference]: Start difference. First operand 11370 states and 16458 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, (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) [2022-11-20 20:25:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:25:56,219 INFO L93 Difference]: Finished difference Result 22941 states and 33965 transitions. [2022-11-20 20:25:56,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:25:56,220 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, (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 134 [2022-11-20 20:25:56,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:25:56,317 INFO L225 Difference]: With dead ends: 22941 [2022-11-20 20:25:56,318 INFO L226 Difference]: Without dead ends: 16204 [2022-11-20 20:25:56,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:25:56,359 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 118 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 20:25:56,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 373 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 20:25:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16204 states. [2022-11-20 20:25:57,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16204 to 15914. [2022-11-20 20:25:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15914 states, 13279 states have (on average 1.4343700579862941) internal successors, (19047), 13344 states have internal predecessors, (19047), 1615 states have call successors, (1615), 1019 states have call predecessors, (1615), 1019 states have return successors, (2520), 1551 states have call predecessors, (2520), 1615 states have call successors, (2520) [2022-11-20 20:25:57,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15914 states to 15914 states and 23182 transitions. [2022-11-20 20:25:57,994 INFO L78 Accepts]: Start accepts. Automaton has 15914 states and 23182 transitions. Word has length 134 [2022-11-20 20:25:57,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:25:57,994 INFO L495 AbstractCegarLoop]: Abstraction has 15914 states and 23182 transitions. [2022-11-20 20:25:57,995 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, (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) [2022-11-20 20:25:57,995 INFO L276 IsEmpty]: Start isEmpty. Operand 15914 states and 23182 transitions. [2022-11-20 20:25:58,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-20 20:25:58,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:25:58,037 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, 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] [2022-11-20 20:25:58,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 20:25:58,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 20:25:58,245 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:25:58,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:25:58,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1780675220, now seen corresponding path program 1 times [2022-11-20 20:25:58,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:25:58,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714394133] [2022-11-20 20:25:58,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:58,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:25:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 20:25:58,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:25:58,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714394133] [2022-11-20 20:25:58,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714394133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:25:58,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270354832] [2022-11-20 20:25:58,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:25:58,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:25:58,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:25:58,606 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:25:58,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 20:25:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:25:58,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:25:58,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:25:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 20:25:58,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:25:58,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270354832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:25:58,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:25:58,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 20:25:58,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649960576] [2022-11-20 20:25:58,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:25:58,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:25:58,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:25:58,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:25:58,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:25:58,868 INFO L87 Difference]: Start difference. First operand 15914 states and 23182 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) [2022-11-20 20:26:00,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:26:00,198 INFO L93 Difference]: Finished difference Result 25134 states and 37832 transitions. [2022-11-20 20:26:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:26:00,199 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 135 [2022-11-20 20:26:00,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:26:00,265 INFO L225 Difference]: With dead ends: 25134 [2022-11-20 20:26:00,265 INFO L226 Difference]: Without dead ends: 15972 [2022-11-20 20:26:00,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:26:00,290 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 118 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:26:00,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 361 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:26:00,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15972 states. [2022-11-20 20:26:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15972 to 15866. [2022-11-20 20:26:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15866 states, 13231 states have (on average 1.4153881036958658) internal successors, (18727), 13296 states have internal predecessors, (18727), 1615 states have call successors, (1615), 1019 states have call predecessors, (1615), 1019 states have return successors, (2520), 1551 states have call predecessors, (2520), 1615 states have call successors, (2520) [2022-11-20 20:26:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15866 states to 15866 states and 22862 transitions. [2022-11-20 20:26:01,776 INFO L78 Accepts]: Start accepts. Automaton has 15866 states and 22862 transitions. Word has length 135 [2022-11-20 20:26:01,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:26:01,777 INFO L495 AbstractCegarLoop]: Abstraction has 15866 states and 22862 transitions. [2022-11-20 20:26:01,777 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) [2022-11-20 20:26:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 15866 states and 22862 transitions. [2022-11-20 20:26:01,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-20 20:26:01,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:26:01,810 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-11-20 20:26:01,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-20 20:26:02,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:26:02,016 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:26:02,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:26:02,017 INFO L85 PathProgramCache]: Analyzing trace with hash -2067497228, now seen corresponding path program 1 times [2022-11-20 20:26:02,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:26:02,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423423196] [2022-11-20 20:26:02,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:02,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:26:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:02,412 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-20 20:26:02,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:26:02,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423423196] [2022-11-20 20:26:02,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423423196] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:26:02,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665891579] [2022-11-20 20:26:02,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:02,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:26:02,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:26:02,415 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:26:02,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 20:26:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:02,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 20:26:02,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:26:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 20:26:02,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:26:02,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665891579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:26:02,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:26:02,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-20 20:26:02,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526018699] [2022-11-20 20:26:02,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:26:02,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:26:02,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:26:02,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:26:02,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:26:02,666 INFO L87 Difference]: Start difference. First operand 15866 states and 22862 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2022-11-20 20:26:04,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:26:04,896 INFO L93 Difference]: Finished difference Result 38096 states and 55920 transitions. [2022-11-20 20:26:04,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 20:26:04,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 135 [2022-11-20 20:26:04,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:26:05,021 INFO L225 Difference]: With dead ends: 38096 [2022-11-20 20:26:05,022 INFO L226 Difference]: Without dead ends: 22237 [2022-11-20 20:26:05,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 20:26:05,067 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 65 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:26:05,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 281 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:26:05,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22237 states. [2022-11-20 20:26:06,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22237 to 18330. [2022-11-20 20:26:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18330 states, 15499 states have (on average 1.448028905090651) internal successors, (22443), 15565 states have internal predecessors, (22443), 1713 states have call successors, (1713), 1117 states have call predecessors, (1713), 1117 states have return successors, (2618), 1648 states have call predecessors, (2618), 1713 states have call successors, (2618) [2022-11-20 20:26:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18330 states to 18330 states and 26774 transitions. [2022-11-20 20:26:06,881 INFO L78 Accepts]: Start accepts. Automaton has 18330 states and 26774 transitions. Word has length 135 [2022-11-20 20:26:06,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:26:06,882 INFO L495 AbstractCegarLoop]: Abstraction has 18330 states and 26774 transitions. [2022-11-20 20:26:06,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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) [2022-11-20 20:26:06,882 INFO L276 IsEmpty]: Start isEmpty. Operand 18330 states and 26774 transitions. [2022-11-20 20:26:06,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-20 20:26:06,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:26:06,910 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, 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] [2022-11-20 20:26:06,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 20:26:07,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 20:26:07,117 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:26:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:26:07,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1345769890, now seen corresponding path program 1 times [2022-11-20 20:26:07,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:26:07,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495179274] [2022-11-20 20:26:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:07,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:26:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 20:26:07,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:26:07,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495179274] [2022-11-20 20:26:07,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495179274] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:26:07,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859960999] [2022-11-20 20:26:07,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:07,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:26:07,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:26:07,495 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:26:07,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 20:26:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:07,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 20:26:07,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:26:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 20:26:07,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:26:07,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859960999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:26:07,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:26:07,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-20 20:26:07,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211135400] [2022-11-20 20:26:07,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:26:07,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 20:26:07,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:26:07,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 20:26:07,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 20:26:07,840 INFO L87 Difference]: Start difference. First operand 18330 states and 26774 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2022-11-20 20:26:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:26:11,645 INFO L93 Difference]: Finished difference Result 54570 states and 79637 transitions. [2022-11-20 20:26:11,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 20:26:11,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 136 [2022-11-20 20:26:11,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:26:11,845 INFO L225 Difference]: With dead ends: 54570 [2022-11-20 20:26:11,845 INFO L226 Difference]: Without dead ends: 36247 [2022-11-20 20:26:11,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-20 20:26:11,908 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 148 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 20:26:11,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 639 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 20:26:11,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36247 states. [2022-11-20 20:26:15,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36247 to 36209. [2022-11-20 20:26:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36209 states, 30558 states have (on average 1.4251587145755613) internal successors, (43550), 30721 states have internal predecessors, (43550), 3387 states have call successors, (3387), 2231 states have call predecessors, (3387), 2263 states have return successors, (5564), 3257 states have call predecessors, (5564), 3387 states have call successors, (5564) [2022-11-20 20:26:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36209 states to 36209 states and 52501 transitions. [2022-11-20 20:26:15,469 INFO L78 Accepts]: Start accepts. Automaton has 36209 states and 52501 transitions. Word has length 136 [2022-11-20 20:26:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:26:15,470 INFO L495 AbstractCegarLoop]: Abstraction has 36209 states and 52501 transitions. [2022-11-20 20:26:15,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2022-11-20 20:26:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 36209 states and 52501 transitions. [2022-11-20 20:26:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-20 20:26:15,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:26:15,532 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, 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] [2022-11-20 20:26:15,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 20:26:15,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 20:26:15,740 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:26:15,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:26:15,740 INFO L85 PathProgramCache]: Analyzing trace with hash -503796263, now seen corresponding path program 1 times [2022-11-20 20:26:15,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:26:15,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953964033] [2022-11-20 20:26:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:15,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:26:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-20 20:26:16,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:26:16,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953964033] [2022-11-20 20:26:16,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953964033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:26:16,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547593674] [2022-11-20 20:26:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:16,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:26:16,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:26:16,099 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:26:16,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 20:26:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:16,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 20:26:16,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:26:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 20:26:16,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:26:16,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547593674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:26:16,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:26:16,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-20 20:26:16,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009919566] [2022-11-20 20:26:16,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:26:16,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 20:26:16,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:26:16,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 20:26:16,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-20 20:26:16,504 INFO L87 Difference]: Start difference. First operand 36209 states and 52501 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2022-11-20 20:26:22,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 20:26:22,235 INFO L93 Difference]: Finished difference Result 89321 states and 129317 transitions. [2022-11-20 20:26:22,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 20:26:22,235 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 136 [2022-11-20 20:26:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 20:26:22,508 INFO L225 Difference]: With dead ends: 89321 [2022-11-20 20:26:22,508 INFO L226 Difference]: Without dead ends: 53119 [2022-11-20 20:26:22,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-20 20:26:22,614 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 514 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 20:26:22,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 301 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 20:26:22,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53119 states. [2022-11-20 20:26:28,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53119 to 53117. [2022-11-20 20:26:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53117 states, 44714 states have (on average 1.4073891845954287) internal successors, (62930), 44957 states have internal predecessors, (62930), 5015 states have call successors, (5015), 3339 states have call predecessors, (5015), 3387 states have return successors, (8209), 4821 states have call predecessors, (8209), 5015 states have call successors, (8209) [2022-11-20 20:26:28,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53117 states to 53117 states and 76154 transitions. [2022-11-20 20:26:28,700 INFO L78 Accepts]: Start accepts. Automaton has 53117 states and 76154 transitions. Word has length 136 [2022-11-20 20:26:28,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 20:26:28,701 INFO L495 AbstractCegarLoop]: Abstraction has 53117 states and 76154 transitions. [2022-11-20 20:26:28,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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) [2022-11-20 20:26:28,701 INFO L276 IsEmpty]: Start isEmpty. Operand 53117 states and 76154 transitions. [2022-11-20 20:26:28,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-20 20:26:28,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 20:26:28,796 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 20:26:28,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 20:26:29,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 20:26:29,004 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 20:26:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 20:26:29,004 INFO L85 PathProgramCache]: Analyzing trace with hash -126412394, now seen corresponding path program 1 times [2022-11-20 20:26:29,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 20:26:29,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827114651] [2022-11-20 20:26:29,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:29,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 20:26:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-20 20:26:29,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 20:26:29,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827114651] [2022-11-20 20:26:29,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827114651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 20:26:29,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740358447] [2022-11-20 20:26:29,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 20:26:29,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 20:26:29,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 20:26:29,135 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 20:26:29,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c295ecbd-2210-4584-acce-6ebe9c6d6150/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 20:26:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 20:26:29,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 20:26:29,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 20:26:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 20:26:29,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 20:26:29,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740358447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 20:26:29,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 20:26:29,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-20 20:26:29,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333169649] [2022-11-20 20:26:29,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 20:26:29,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 20:26:29,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 20:26:29,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 20:26:29,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 20:26:29,389 INFO L87 Difference]: Start difference. First operand 53117 states and 76154 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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)