./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI --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 284334fdd31c4c26d16d0bf558a458f462d11a8d54419841fe6fc9cdbb9a1cfc --- 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-5e519f3 [2022-11-03 02:44:18,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:44:18,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:44:18,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:44:18,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:44:18,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:44:18,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:44:18,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:44:18,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:44:18,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:44:18,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:44:18,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:44:18,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:44:18,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:44:18,376 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:44:18,378 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:44:18,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:44:18,381 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:44:18,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:44:18,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:44:18,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:44:18,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:44:18,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:44:18,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:44:18,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:44:18,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:44:18,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:44:18,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:44:18,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:44:18,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:44:18,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:44:18,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:44:18,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:44:18,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:44:18,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:44:18,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:44:18,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:44:18,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:44:18,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:44:18,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:44:18,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:44:18,424 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:44:18,470 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:44:18,470 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:44:18,471 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:44:18,471 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:44:18,472 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:44:18,472 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:44:18,473 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:44:18,473 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:44:18,473 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:44:18,473 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:44:18,475 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:44:18,475 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:44:18,475 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:44:18,475 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:44:18,475 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:44:18,476 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:44:18,476 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:44:18,476 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:44:18,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:44:18,477 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:44:18,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:44:18,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:44:18,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:44:18,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:44:18,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:44:18,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:44:18,479 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:44:18,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:44:18,480 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:44:18,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:44:18,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:44:18,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:44:18,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:44:18,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:44:18,481 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:44:18,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:44:18,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:44:18,482 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:44:18,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:44:18,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:44:18,483 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:44:18,483 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_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 284334fdd31c4c26d16d0bf558a458f462d11a8d54419841fe6fc9cdbb9a1cfc [2022-11-03 02:44:18,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:44:18,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:44:18,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:44:18,865 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:44:18,866 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:44:18,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2022-11-03 02:44:18,945 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/data/515e5f73d/3ed174ef37b8404a917d9a8bf10385f3/FLAG97fe7f845 [2022-11-03 02:44:19,586 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:44:19,587 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2022-11-03 02:44:19,598 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/data/515e5f73d/3ed174ef37b8404a917d9a8bf10385f3/FLAG97fe7f845 [2022-11-03 02:44:19,906 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/data/515e5f73d/3ed174ef37b8404a917d9a8bf10385f3 [2022-11-03 02:44:19,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:44:19,910 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:44:19,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:44:19,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:44:19,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:44:19,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:44:19" (1/1) ... [2022-11-03 02:44:19,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bbea6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:19, skipping insertion in model container [2022-11-03 02:44:19,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:44:19" (1/1) ... [2022-11-03 02:44:19,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:44:19,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:44:20,173 WARN L230 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_408df629-df89-4b5f-ba26-409e9b4d049c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[914,927] [2022-11-03 02:44:20,273 WARN L230 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_408df629-df89-4b5f-ba26-409e9b4d049c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[7115,7128] [2022-11-03 02:44:20,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:44:20,384 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:44:20,400 WARN L230 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_408df629-df89-4b5f-ba26-409e9b4d049c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[914,927] [2022-11-03 02:44:20,435 WARN L230 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_408df629-df89-4b5f-ba26-409e9b4d049c/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-1.c[7115,7128] [2022-11-03 02:44:20,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:44:20,481 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:44:20,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:20 WrapperNode [2022-11-03 02:44:20,482 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:44:20,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:44:20,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:44:20,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:44:20,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:20" (1/1) ... [2022-11-03 02:44:20,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:20" (1/1) ... [2022-11-03 02:44:20,579 INFO L138 Inliner]: procedures = 61, calls = 69, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 576 [2022-11-03 02:44:20,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:44:20,585 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:44:20,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:44:20,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:44:20,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:20" (1/1) ... [2022-11-03 02:44:20,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:20" (1/1) ... [2022-11-03 02:44:20,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:20" (1/1) ... [2022-11-03 02:44:20,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:20" (1/1) ... [2022-11-03 02:44:20,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:20" (1/1) ... [2022-11-03 02:44:20,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:20" (1/1) ... [2022-11-03 02:44:20,664 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:20" (1/1) ... [2022-11-03 02:44:20,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:20" (1/1) ... [2022-11-03 02:44:20,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:44:20,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:44:20,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:44:20,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:44:20,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:20" (1/1) ... [2022-11-03 02:44:20,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:44:20,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:20,716 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:44:20,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:44:20,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:44:20,768 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 02:44:20,768 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 02:44:20,768 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-03 02:44:20,769 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-03 02:44:20,769 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-03 02:44:20,769 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-03 02:44:20,769 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-03 02:44:20,770 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-03 02:44:20,770 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-03 02:44:20,770 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-03 02:44:20,770 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-03 02:44:20,771 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-03 02:44:20,771 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-03 02:44:20,771 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-03 02:44:20,771 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-03 02:44:20,772 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-03 02:44:20,772 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-03 02:44:20,772 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-03 02:44:20,772 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-03 02:44:20,773 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-03 02:44:20,773 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-03 02:44:20,773 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-03 02:44:20,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:44:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-03 02:44:20,774 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-03 02:44:20,774 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-03 02:44:20,774 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-03 02:44:20,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:44:20,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:44:20,775 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-03 02:44:20,776 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-03 02:44:20,901 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:44:20,904 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:44:21,735 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:44:22,098 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:44:22,098 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-03 02:44:22,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:44:22 BoogieIcfgContainer [2022-11-03 02:44:22,101 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:44:22,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:44:22,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:44:22,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:44:22,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:44:19" (1/3) ... [2022-11-03 02:44:22,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aee329e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:44:22, skipping insertion in model container [2022-11-03 02:44:22,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:44:20" (2/3) ... [2022-11-03 02:44:22,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aee329e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:44:22, skipping insertion in model container [2022-11-03 02:44:22,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:44:22" (3/3) ... [2022-11-03 02:44:22,112 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.04.cil-1.c [2022-11-03 02:44:22,131 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:44:22,132 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 02:44:22,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:44:22,212 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;@4c39a00e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:44:22,213 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 02:44:22,219 INFO L276 IsEmpty]: Start isEmpty. Operand has 172 states, 123 states have (on average 1.5040650406504066) internal successors, (185), 129 states have internal predecessors, (185), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-03 02:44:22,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:44:22,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:22,236 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] [2022-11-03 02:44:22,237 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:22,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:22,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2144976466, now seen corresponding path program 1 times [2022-11-03 02:44:22,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:22,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033436045] [2022-11-03 02:44:22,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:22,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:22,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:22,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033436045] [2022-11-03 02:44:22,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033436045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:22,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:22,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:44:22,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863475014] [2022-11-03 02:44:22,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:22,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:44:22,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:22,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:44:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:44:22,797 INFO L87 Difference]: Start difference. First operand has 172 states, 123 states have (on average 1.5040650406504066) internal successors, (185), 129 states have internal predecessors, (185), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-11-03 02:44:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:23,231 INFO L93 Difference]: Finished difference Result 395 states and 569 transitions. [2022-11-03 02:44:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:44:23,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 45 [2022-11-03 02:44:23,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:23,256 INFO L225 Difference]: With dead ends: 395 [2022-11-03 02:44:23,257 INFO L226 Difference]: Without dead ends: 227 [2022-11-03 02:44:23,266 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 [2022-11-03 02:44:23,271 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 297 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:23,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 424 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:44:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-03 02:44:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 220. [2022-11-03 02:44:23,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 158 states have (on average 1.379746835443038) internal successors, (218), 162 states have internal predecessors, (218), 40 states have call successors, (40), 21 states have call predecessors, (40), 20 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-11-03 02:44:23,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 296 transitions. [2022-11-03 02:44:23,340 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 296 transitions. Word has length 45 [2022-11-03 02:44:23,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:23,341 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 296 transitions. [2022-11-03 02:44:23,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-11-03 02:44:23,342 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 296 transitions. [2022-11-03 02:44:23,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-03 02:44:23,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:23,344 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] [2022-11-03 02:44:23,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:44:23,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:23,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:23,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1231016207, now seen corresponding path program 1 times [2022-11-03 02:44:23,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:23,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567392825] [2022-11-03 02:44:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:23,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:23,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:23,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567392825] [2022-11-03 02:44:23,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567392825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:23,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:23,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:44:23,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911070151] [2022-11-03 02:44:23,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:23,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:44:23,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:23,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:44:23,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:44:23,670 INFO L87 Difference]: Start difference. First operand 220 states and 296 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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) [2022-11-03 02:44:24,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:24,429 INFO L93 Difference]: Finished difference Result 401 states and 517 transitions. [2022-11-03 02:44:24,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:44:24,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 45 [2022-11-03 02:44:24,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:24,433 INFO L225 Difference]: With dead ends: 401 [2022-11-03 02:44:24,434 INFO L226 Difference]: Without dead ends: 285 [2022-11-03 02:44:24,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:44:24,436 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 354 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:24,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 741 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:44:24,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-03 02:44:24,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 272. [2022-11-03 02:44:24,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 195 states have (on average 1.358974358974359) internal successors, (265), 199 states have internal predecessors, (265), 48 states have call successors, (48), 28 states have call predecessors, (48), 27 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-03 02:44:24,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 359 transitions. [2022-11-03 02:44:24,527 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 359 transitions. Word has length 45 [2022-11-03 02:44:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:24,528 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 359 transitions. [2022-11-03 02:44:24,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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) [2022-11-03 02:44:24,530 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 359 transitions. [2022-11-03 02:44:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 02:44:24,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:24,541 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] [2022-11-03 02:44:24,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:44:24,542 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:24,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:24,543 INFO L85 PathProgramCache]: Analyzing trace with hash 2125755935, now seen corresponding path program 1 times [2022-11-03 02:44:24,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:24,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971256784] [2022-11-03 02:44:24,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:24,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:24,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:24,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971256784] [2022-11-03 02:44:24,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971256784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:24,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:24,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:44:24,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162134204] [2022-11-03 02:44:24,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:24,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:44:24,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:24,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:44:24,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:24,723 INFO L87 Difference]: Start difference. First operand 272 states and 359 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2022-11-03 02:44:25,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:25,499 INFO L93 Difference]: Finished difference Result 710 states and 1042 transitions. [2022-11-03 02:44:25,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:44:25,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 43 [2022-11-03 02:44:25,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:25,509 INFO L225 Difference]: With dead ends: 710 [2022-11-03 02:44:25,509 INFO L226 Difference]: Without dead ends: 617 [2022-11-03 02:44:25,515 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 [2022-11-03 02:44:25,518 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 703 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:25,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 727 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:44:25,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-03 02:44:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 606. [2022-11-03 02:44:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 452 states have (on average 1.404867256637168) internal successors, (635), 459 states have internal predecessors, (635), 101 states have call successors, (101), 52 states have call predecessors, (101), 51 states have return successors, (129), 96 states have call predecessors, (129), 99 states have call successors, (129) [2022-11-03 02:44:25,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 865 transitions. [2022-11-03 02:44:25,615 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 865 transitions. Word has length 43 [2022-11-03 02:44:25,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:25,616 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 865 transitions. [2022-11-03 02:44:25,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2022-11-03 02:44:25,616 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 865 transitions. [2022-11-03 02:44:25,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-03 02:44:25,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:25,620 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] [2022-11-03 02:44:25,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:44:25,621 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:25,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:25,623 INFO L85 PathProgramCache]: Analyzing trace with hash 570857465, now seen corresponding path program 1 times [2022-11-03 02:44:25,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:25,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17743962] [2022-11-03 02:44:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:25,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:25,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:25,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17743962] [2022-11-03 02:44:25,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17743962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:25,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:25,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:25,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979637308] [2022-11-03 02:44:25,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:25,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:44:25,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:25,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:44:25,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:44:25,702 INFO L87 Difference]: Start difference. First operand 606 states and 865 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-11-03 02:44:25,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:25,852 INFO L93 Difference]: Finished difference Result 934 states and 1271 transitions. [2022-11-03 02:44:25,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:44:25,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 46 [2022-11-03 02:44:25,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:25,858 INFO L225 Difference]: With dead ends: 934 [2022-11-03 02:44:25,859 INFO L226 Difference]: Without dead ends: 765 [2022-11-03 02:44:25,860 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 [2022-11-03 02:44:25,861 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 208 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:25,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 263 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:44:25,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-11-03 02:44:25,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 746. [2022-11-03 02:44:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 547 states have (on average 1.3619744058500913) internal successors, (745), 554 states have internal predecessors, (745), 125 states have call successors, (125), 73 states have call predecessors, (125), 72 states have return successors, (153), 120 states have call predecessors, (153), 123 states have call successors, (153) [2022-11-03 02:44:25,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1023 transitions. [2022-11-03 02:44:25,951 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1023 transitions. Word has length 46 [2022-11-03 02:44:25,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:25,952 INFO L495 AbstractCegarLoop]: Abstraction has 746 states and 1023 transitions. [2022-11-03 02:44:25,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-11-03 02:44:25,952 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1023 transitions. [2022-11-03 02:44:25,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:44:25,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:25,954 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] [2022-11-03 02:44:25,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:44:25,954 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:25,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:25,955 INFO L85 PathProgramCache]: Analyzing trace with hash 431018710, now seen corresponding path program 1 times [2022-11-03 02:44:25,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:25,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017077753] [2022-11-03 02:44:25,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:25,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:26,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:26,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017077753] [2022-11-03 02:44:26,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017077753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:26,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:26,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:44:26,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235087606] [2022-11-03 02:44:26,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:26,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:44:26,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:44:26,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:44:26,010 INFO L87 Difference]: Start difference. First operand 746 states and 1023 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) [2022-11-03 02:44:26,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:26,193 INFO L93 Difference]: Finished difference Result 1116 states and 1468 transitions. [2022-11-03 02:44:26,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:44:26,194 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 [2022-11-03 02:44:26,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:26,201 INFO L225 Difference]: With dead ends: 1116 [2022-11-03 02:44:26,201 INFO L226 Difference]: Without dead ends: 853 [2022-11-03 02:44:26,203 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 [2022-11-03 02:44:26,204 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 67 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:26,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 379 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:44:26,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-11-03 02:44:26,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 847. [2022-11-03 02:44:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 618 states have (on average 1.3478964401294498) internal successors, (833), 625 states have internal predecessors, (833), 141 states have call successors, (141), 87 states have call predecessors, (141), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2022-11-03 02:44:26,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1143 transitions. [2022-11-03 02:44:26,324 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1143 transitions. Word has length 47 [2022-11-03 02:44:26,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:26,325 INFO L495 AbstractCegarLoop]: Abstraction has 847 states and 1143 transitions. [2022-11-03 02:44:26,325 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) [2022-11-03 02:44:26,325 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1143 transitions. [2022-11-03 02:44:26,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-03 02:44:26,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:26,328 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:26,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:44:26,329 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:26,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:26,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1272476420, now seen corresponding path program 1 times [2022-11-03 02:44:26,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:26,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469502922] [2022-11-03 02:44:26,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:26,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:26,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:26,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469502922] [2022-11-03 02:44:26,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469502922] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:26,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:44:26,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:44:26,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224518823] [2022-11-03 02:44:26,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:26,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:44:26,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:26,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:44:26,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:44:26,446 INFO L87 Difference]: Start difference. First operand 847 states and 1143 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 02:44:26,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:44:26,786 INFO L93 Difference]: Finished difference Result 954 states and 1269 transitions. [2022-11-03 02:44:26,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:44:26,786 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-03 02:44:26,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:44:26,791 INFO L225 Difference]: With dead ends: 954 [2022-11-03 02:44:26,792 INFO L226 Difference]: Without dead ends: 951 [2022-11-03 02:44:26,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:44:26,793 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 376 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:44:26,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 246 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:44:26,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-11-03 02:44:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 846. [2022-11-03 02:44:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 618 states have (on average 1.343042071197411) internal successors, (830), 624 states have internal predecessors, (830), 140 states have call successors, (140), 87 states have call predecessors, (140), 86 states have return successors, (169), 136 states have call predecessors, (169), 139 states have call successors, (169) [2022-11-03 02:44:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1139 transitions. [2022-11-03 02:44:26,915 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1139 transitions. Word has length 54 [2022-11-03 02:44:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:44:26,918 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1139 transitions. [2022-11-03 02:44:26,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 02:44:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1139 transitions. [2022-11-03 02:44:26,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-03 02:44:26,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:44:26,921 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:44:26,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:44:26,922 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:44:26,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:44:26,922 INFO L85 PathProgramCache]: Analyzing trace with hash -792910145, now seen corresponding path program 1 times [2022-11-03 02:44:26,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:44:26,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837703011] [2022-11-03 02:44:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:26,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:44:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:27,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:44:27,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837703011] [2022-11-03 02:44:27,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837703011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:44:27,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939539381] [2022-11-03 02:44:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:44:27,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:44:27,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:44:27,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:44:27,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:44:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:44:27,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:44:27,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:44:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:27,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:44:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:44:27,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939539381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:44:27,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [218588894] [2022-11-03 02:44:28,003 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-03 02:44:28,003 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:44:28,007 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:44:28,013 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:44:28,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:44:31,790 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 125 for LOIs [2022-11-03 02:44:31,818 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 121 for LOIs [2022-11-03 02:44:31,842 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 129 for LOIs [2022-11-03 02:44:32,359 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 125 for LOIs [2022-11-03 02:44:32,422 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 125 for LOIs [2022-11-03 02:44:32,481 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 125 for LOIs [2022-11-03 02:44:32,507 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 132 for LOIs [2022-11-03 02:44:32,532 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:44:48,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [218588894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:44:48,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:44:48,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2022-11-03 02:44:48,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109353411] [2022-11-03 02:44:48,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:44:48,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-03 02:44:48,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:44:48,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-03 02:44:48,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1682, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 02:44:48,530 INFO L87 Difference]: Start difference. First operand 846 states and 1139 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 02:45:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:13,105 INFO L93 Difference]: Finished difference Result 1303 states and 1672 transitions. [2022-11-03 02:45:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 02:45:13,108 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-03 02:45:13,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:13,113 INFO L225 Difference]: With dead ends: 1303 [2022-11-03 02:45:13,113 INFO L226 Difference]: Without dead ends: 895 [2022-11-03 02:45:13,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=620, Invalid=4492, Unknown=0, NotChecked=0, Total=5112 [2022-11-03 02:45:13,117 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 172 mSDsluCounter, 1859 mSDsCounter, 0 mSdLazyCounter, 3888 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1953 SdHoareTripleChecker+Invalid, 4077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 3888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:13,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1953 Invalid, 4077 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [189 Valid, 3888 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-03 02:45:13,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-11-03 02:45:13,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 880. [2022-11-03 02:45:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 644 states have (on average 1.3322981366459627) internal successors, (858), 650 states have internal predecessors, (858), 142 states have call successors, (142), 93 states have call predecessors, (142), 92 states have return successors, (171), 138 states have call predecessors, (171), 141 states have call successors, (171) [2022-11-03 02:45:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1171 transitions. [2022-11-03 02:45:13,246 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1171 transitions. Word has length 55 [2022-11-03 02:45:13,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:13,246 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 1171 transitions. [2022-11-03 02:45:13,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 02:45:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1171 transitions. [2022-11-03 02:45:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-03 02:45:13,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:13,249 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:45:13,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:13,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:13,463 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:13,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:13,464 INFO L85 PathProgramCache]: Analyzing trace with hash -681505438, now seen corresponding path program 1 times [2022-11-03 02:45:13,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:13,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123472720] [2022-11-03 02:45:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:13,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:13,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:45:13,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:13,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123472720] [2022-11-03 02:45:13,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123472720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:13,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:13,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:45:13,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321325981] [2022-11-03 02:45:13,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:13,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:13,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:13,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:13,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:45:13,541 INFO L87 Difference]: Start difference. First operand 880 states and 1171 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:45:13,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:13,766 INFO L93 Difference]: Finished difference Result 1327 states and 1707 transitions. [2022-11-03 02:45:13,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:13,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-03 02:45:13,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:13,773 INFO L225 Difference]: With dead ends: 1327 [2022-11-03 02:45:13,773 INFO L226 Difference]: Without dead ends: 1061 [2022-11-03 02:45:13,775 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 [2022-11-03 02:45:13,775 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 43 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:13,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 422 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:13,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2022-11-03 02:45:13,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 932. [2022-11-03 02:45:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 686 states have (on average 1.3279883381924198) internal successors, (911), 692 states have internal predecessors, (911), 147 states have call successors, (147), 98 states have call predecessors, (147), 97 states have return successors, (176), 143 states have call predecessors, (176), 146 states have call successors, (176) [2022-11-03 02:45:13,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1234 transitions. [2022-11-03 02:45:13,911 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1234 transitions. Word has length 61 [2022-11-03 02:45:13,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:13,916 INFO L495 AbstractCegarLoop]: Abstraction has 932 states and 1234 transitions. [2022-11-03 02:45:13,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:45:13,916 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1234 transitions. [2022-11-03 02:45:13,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-03 02:45:13,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:13,919 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:13,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:45:13,920 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:13,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:13,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1392423349, now seen corresponding path program 1 times [2022-11-03 02:45:13,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:13,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732862129] [2022-11-03 02:45:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:13,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:45:14,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:14,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732862129] [2022-11-03 02:45:14,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732862129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:14,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:14,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 02:45:14,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687982314] [2022-11-03 02:45:14,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:14,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:45:14,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:14,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:45:14,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:45:14,109 INFO L87 Difference]: Start difference. First operand 932 states and 1234 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:45:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:14,853 INFO L93 Difference]: Finished difference Result 1606 states and 2021 transitions. [2022-11-03 02:45:14,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:45:14,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-11-03 02:45:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:14,860 INFO L225 Difference]: With dead ends: 1606 [2022-11-03 02:45:14,860 INFO L226 Difference]: Without dead ends: 1193 [2022-11-03 02:45:14,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:45:14,868 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 336 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:14,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 614 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:45:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-11-03 02:45:15,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1158. [2022-11-03 02:45:15,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 837 states have (on average 1.2951015531660692) internal successors, (1084), 843 states have internal predecessors, (1084), 187 states have call successors, (187), 133 states have call predecessors, (187), 132 states have return successors, (216), 183 states have call predecessors, (216), 186 states have call successors, (216) [2022-11-03 02:45:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1487 transitions. [2022-11-03 02:45:15,050 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1487 transitions. Word has length 63 [2022-11-03 02:45:15,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:15,051 INFO L495 AbstractCegarLoop]: Abstraction has 1158 states and 1487 transitions. [2022-11-03 02:45:15,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-03 02:45:15,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1487 transitions. [2022-11-03 02:45:15,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-03 02:45:15,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:15,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:15,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:45:15,053 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:15,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:15,054 INFO L85 PathProgramCache]: Analyzing trace with hash -897605414, now seen corresponding path program 1 times [2022-11-03 02:45:15,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:15,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656648205] [2022-11-03 02:45:15,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:15,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:15,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:45:15,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:15,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656648205] [2022-11-03 02:45:15,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656648205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:15,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582957048] [2022-11-03 02:45:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:15,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:15,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:15,203 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:15,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:45:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:15,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:45:15,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:45:15,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:45:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:45:15,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582957048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:45:15,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1327445314] [2022-11-03 02:45:15,811 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-03 02:45:15,811 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:45:15,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:45:15,813 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:45:15,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:45:22,210 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 125 for LOIs [2022-11-03 02:45:22,238 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 163 for LOIs [2022-11-03 02:45:22,286 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 164 for LOIs [2022-11-03 02:45:22,331 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 129 for LOIs [2022-11-03 02:45:22,668 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 125 for LOIs [2022-11-03 02:45:22,699 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 125 for LOIs [2022-11-03 02:45:22,736 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 125 for LOIs [2022-11-03 02:45:22,754 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 132 for LOIs [2022-11-03 02:45:22,769 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:45:43,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23435#(and (= ~q_req_up~0 1) (= ~T4_E~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~E_3~0 2) (<= ~t1_pc~0 0) (<= 2 ~M_E~0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (= ~E_2~0 2) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (<= ~c_num_read~0 1) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (= ~c_dr_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:45:43,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:45:43,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:45:43,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-03 02:45:43,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514577150] [2022-11-03 02:45:43,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:45:43,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:45:43,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:43,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:45:43,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:45:43,455 INFO L87 Difference]: Start difference. First operand 1158 states and 1487 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-03 02:45:44,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:44,321 INFO L93 Difference]: Finished difference Result 2664 states and 3250 transitions. [2022-11-03 02:45:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:45:44,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-11-03 02:45:44,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:44,335 INFO L225 Difference]: With dead ends: 2664 [2022-11-03 02:45:44,336 INFO L226 Difference]: Without dead ends: 2661 [2022-11-03 02:45:44,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 02:45:44,339 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 496 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:44,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 796 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:45:44,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2661 states. [2022-11-03 02:45:44,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2661 to 1881. [2022-11-03 02:45:44,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1338 states have (on average 1.2675635276532138) internal successors, (1696), 1344 states have internal predecessors, (1696), 305 states have call successors, (305), 237 states have call predecessors, (305), 236 states have return successors, (334), 301 states have call predecessors, (334), 304 states have call successors, (334) [2022-11-03 02:45:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 2335 transitions. [2022-11-03 02:45:44,657 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 2335 transitions. Word has length 64 [2022-11-03 02:45:44,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:44,658 INFO L495 AbstractCegarLoop]: Abstraction has 1881 states and 2335 transitions. [2022-11-03 02:45:44,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-03 02:45:44,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 2335 transitions. [2022-11-03 02:45:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-03 02:45:44,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:44,661 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:44,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:44,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 02:45:44,887 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:44,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:44,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1073841149, now seen corresponding path program 2 times [2022-11-03 02:45:44,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:44,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978811329] [2022-11-03 02:45:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:44,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:45:44,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:44,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978811329] [2022-11-03 02:45:44,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978811329] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:44,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:44,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:45:44,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722352375] [2022-11-03 02:45:44,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:44,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:44,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:44,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:44,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:45:44,943 INFO L87 Difference]: Start difference. First operand 1881 states and 2335 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:45:45,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:45,257 INFO L93 Difference]: Finished difference Result 2637 states and 3221 transitions. [2022-11-03 02:45:45,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:45,258 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-11-03 02:45:45,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:45,267 INFO L225 Difference]: With dead ends: 2637 [2022-11-03 02:45:45,267 INFO L226 Difference]: Without dead ends: 1471 [2022-11-03 02:45:45,271 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 [2022-11-03 02:45:45,272 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 206 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:45,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 304 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:45,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2022-11-03 02:45:45,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1464. [2022-11-03 02:45:45,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1464 states, 1049 states have (on average 1.2659675881792183) internal successors, (1328), 1055 states have internal predecessors, (1328), 237 states have call successors, (237), 177 states have call predecessors, (237), 176 states have return successors, (266), 233 states have call predecessors, (266), 236 states have call successors, (266) [2022-11-03 02:45:45,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 1831 transitions. [2022-11-03 02:45:45,520 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 1831 transitions. Word has length 67 [2022-11-03 02:45:45,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:45,520 INFO L495 AbstractCegarLoop]: Abstraction has 1464 states and 1831 transitions. [2022-11-03 02:45:45,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:45:45,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 1831 transitions. [2022-11-03 02:45:45,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-03 02:45:45,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:45,529 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-03 02:45:45,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:45:45,530 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:45,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:45,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1196546793, now seen corresponding path program 1 times [2022-11-03 02:45:45,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:45,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658250185] [2022-11-03 02:45:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:45,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:45:45,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:45,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658250185] [2022-11-03 02:45:45,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658250185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:45,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:45,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:45:45,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274091988] [2022-11-03 02:45:45,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:45,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:45,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:45,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:45,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:45:45,590 INFO L87 Difference]: Start difference. First operand 1464 states and 1831 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:45:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:45,931 INFO L93 Difference]: Finished difference Result 2436 states and 2959 transitions. [2022-11-03 02:45:45,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:45,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-03 02:45:45,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:45,940 INFO L225 Difference]: With dead ends: 2436 [2022-11-03 02:45:45,940 INFO L226 Difference]: Without dead ends: 1640 [2022-11-03 02:45:45,942 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 [2022-11-03 02:45:45,944 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 38 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:45,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 413 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2022-11-03 02:45:46,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1511. [2022-11-03 02:45:46,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1511 states, 1088 states have (on average 1.2665441176470589) internal successors, (1378), 1094 states have internal predecessors, (1378), 241 states have call successors, (241), 181 states have call predecessors, (241), 180 states have return successors, (270), 237 states have call predecessors, (270), 240 states have call successors, (270) [2022-11-03 02:45:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 1889 transitions. [2022-11-03 02:45:46,156 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 1889 transitions. Word has length 71 [2022-11-03 02:45:46,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:46,157 INFO L495 AbstractCegarLoop]: Abstraction has 1511 states and 1889 transitions. [2022-11-03 02:45:46,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 02:45:46,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 1889 transitions. [2022-11-03 02:45:46,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 02:45:46,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:46,160 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:46,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:45:46,161 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:46,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:46,161 INFO L85 PathProgramCache]: Analyzing trace with hash -501639998, now seen corresponding path program 1 times [2022-11-03 02:45:46,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:46,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984429818] [2022-11-03 02:45:46,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:46,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:45:46,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:46,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984429818] [2022-11-03 02:45:46,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984429818] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:46,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072769923] [2022-11-03 02:45:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:46,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:46,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:46,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:46,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:45:46,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:46,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:46,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 02:45:46,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:46,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072769923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:46,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:46,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:45:46,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581909914] [2022-11-03 02:45:46,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:46,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:46,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:46,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:46,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:46,470 INFO L87 Difference]: Start difference. First operand 1511 states and 1889 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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) [2022-11-03 02:45:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:46,822 INFO L93 Difference]: Finished difference Result 2349 states and 3197 transitions. [2022-11-03 02:45:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:46,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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 80 [2022-11-03 02:45:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:46,832 INFO L225 Difference]: With dead ends: 2349 [2022-11-03 02:45:46,832 INFO L226 Difference]: Without dead ends: 1922 [2022-11-03 02:45:46,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:46,836 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 202 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:46,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 308 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:46,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2022-11-03 02:45:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1915. [2022-11-03 02:45:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1400 states have (on average 1.3007142857142857) internal successors, (1821), 1409 states have internal predecessors, (1821), 303 states have call successors, (303), 211 states have call predecessors, (303), 210 states have return successors, (358), 296 states have call predecessors, (358), 302 states have call successors, (358) [2022-11-03 02:45:47,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 2482 transitions. [2022-11-03 02:45:47,105 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 2482 transitions. Word has length 80 [2022-11-03 02:45:47,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:47,105 INFO L495 AbstractCegarLoop]: Abstraction has 1915 states and 2482 transitions. [2022-11-03 02:45:47,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 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) [2022-11-03 02:45:47,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 2482 transitions. [2022-11-03 02:45:47,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 02:45:47,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:47,109 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:47,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:47,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 02:45:47,335 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:47,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:47,335 INFO L85 PathProgramCache]: Analyzing trace with hash 214325474, now seen corresponding path program 1 times [2022-11-03 02:45:47,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:47,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716012088] [2022-11-03 02:45:47,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:47,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:45:47,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:47,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716012088] [2022-11-03 02:45:47,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716012088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:47,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317144170] [2022-11-03 02:45:47,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:47,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:47,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:47,448 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:47,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:45:47,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:47,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:45:47,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:45:47,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:47,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317144170] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:47,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:47,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 02:45:47,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438606638] [2022-11-03 02:45:47,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:47,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:47,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:47,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:47,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:47,663 INFO L87 Difference]: Start difference. First operand 1915 states and 2482 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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) [2022-11-03 02:45:48,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:48,108 INFO L93 Difference]: Finished difference Result 3546 states and 4996 transitions. [2022-11-03 02:45:48,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:48,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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 80 [2022-11-03 02:45:48,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:48,122 INFO L225 Difference]: With dead ends: 3546 [2022-11-03 02:45:48,123 INFO L226 Difference]: Without dead ends: 2715 [2022-11-03 02:45:48,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:45:48,128 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 199 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:48,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 308 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:48,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2715 states. [2022-11-03 02:45:48,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2715 to 2703. [2022-11-03 02:45:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2009 states have (on average 1.3325037332005973) internal successors, (2677), 2024 states have internal predecessors, (2677), 422 states have call successors, (422), 271 states have call predecessors, (422), 270 states have return successors, (525), 409 states have call predecessors, (525), 421 states have call successors, (525) [2022-11-03 02:45:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 3624 transitions. [2022-11-03 02:45:48,482 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 3624 transitions. Word has length 80 [2022-11-03 02:45:48,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:48,483 INFO L495 AbstractCegarLoop]: Abstraction has 2703 states and 3624 transitions. [2022-11-03 02:45:48,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 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) [2022-11-03 02:45:48,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 3624 transitions. [2022-11-03 02:45:48,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-03 02:45:48,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:48,487 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:48,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:48,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:45:48,715 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:48,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:48,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1135802174, now seen corresponding path program 1 times [2022-11-03 02:45:48,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:48,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045843665] [2022-11-03 02:45:48,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:48,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:45:48,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:48,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045843665] [2022-11-03 02:45:48,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045843665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:48,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:48,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:45:48,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703919054] [2022-11-03 02:45:48,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:48,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:48,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:48,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:48,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:45:48,807 INFO L87 Difference]: Start difference. First operand 2703 states and 3624 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-03 02:45:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:49,293 INFO L93 Difference]: Finished difference Result 4377 states and 6189 transitions. [2022-11-03 02:45:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:49,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 80 [2022-11-03 02:45:49,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:49,311 INFO L225 Difference]: With dead ends: 4377 [2022-11-03 02:45:49,311 INFO L226 Difference]: Without dead ends: 3079 [2022-11-03 02:45:49,319 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 [2022-11-03 02:45:49,320 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 56 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:49,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 443 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3079 states. [2022-11-03 02:45:49,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3079 to 2907. [2022-11-03 02:45:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 2197 states have (on average 1.3623122439690487) internal successors, (2993), 2212 states have internal predecessors, (2993), 430 states have call successors, (430), 279 states have call predecessors, (430), 278 states have return successors, (533), 417 states have call predecessors, (533), 429 states have call successors, (533) [2022-11-03 02:45:49,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 3956 transitions. [2022-11-03 02:45:49,757 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 3956 transitions. Word has length 80 [2022-11-03 02:45:49,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:49,757 INFO L495 AbstractCegarLoop]: Abstraction has 2907 states and 3956 transitions. [2022-11-03 02:45:49,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2022-11-03 02:45:49,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 3956 transitions. [2022-11-03 02:45:49,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:45:49,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:49,763 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:45:49,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 02:45:49,763 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:49,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:49,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1459911542, now seen corresponding path program 1 times [2022-11-03 02:45:49,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:49,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662221952] [2022-11-03 02:45:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:49,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:45:50,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:50,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662221952] [2022-11-03 02:45:50,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662221952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:50,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926243038] [2022-11-03 02:45:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:50,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:50,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:50,198 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:50,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:45:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:50,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:45:50,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:45:50,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:50,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926243038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:50,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:50,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2022-11-03 02:45:50,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592453754] [2022-11-03 02:45:50,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:50,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:50,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:50,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:50,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:45:50,404 INFO L87 Difference]: Start difference. First operand 2907 states and 3956 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:45:50,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:50,833 INFO L93 Difference]: Finished difference Result 3732 states and 4944 transitions. [2022-11-03 02:45:50,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:50,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-03 02:45:50,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:50,851 INFO L225 Difference]: With dead ends: 3732 [2022-11-03 02:45:50,852 INFO L226 Difference]: Without dead ends: 2936 [2022-11-03 02:45:50,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:45:50,856 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 46 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:50,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 425 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:50,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2936 states. [2022-11-03 02:45:51,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2936 to 2903. [2022-11-03 02:45:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2193 states have (on average 1.3483812129502963) internal successors, (2957), 2208 states have internal predecessors, (2957), 430 states have call successors, (430), 279 states have call predecessors, (430), 278 states have return successors, (533), 417 states have call predecessors, (533), 429 states have call successors, (533) [2022-11-03 02:45:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 3920 transitions. [2022-11-03 02:45:51,307 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 3920 transitions. Word has length 102 [2022-11-03 02:45:51,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:51,308 INFO L495 AbstractCegarLoop]: Abstraction has 2903 states and 3920 transitions. [2022-11-03 02:45:51,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:45:51,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 3920 transitions. [2022-11-03 02:45:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-03 02:45:51,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:51,314 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-03 02:45:51,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:51,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:45:51,531 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:51,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:51,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1258497995, now seen corresponding path program 1 times [2022-11-03 02:45:51,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:51,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425687396] [2022-11-03 02:45:51,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:51,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:45:51,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:51,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425687396] [2022-11-03 02:45:51,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425687396] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:51,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125379375] [2022-11-03 02:45:51,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:51,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:51,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:51,990 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:52,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:45:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:52,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 02:45:52,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:45:52,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:52,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125379375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:52,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:52,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-03 02:45:52,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727662485] [2022-11-03 02:45:52,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:52,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:45:52,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:52,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:45:52,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:45:52,202 INFO L87 Difference]: Start difference. First operand 2903 states and 3920 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:45:52,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:52,792 INFO L93 Difference]: Finished difference Result 3765 states and 4924 transitions. [2022-11-03 02:45:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:45:52,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-03 02:45:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:52,813 INFO L225 Difference]: With dead ends: 3765 [2022-11-03 02:45:52,814 INFO L226 Difference]: Without dead ends: 2718 [2022-11-03 02:45:52,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:45:52,817 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 199 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:52,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 881 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:45:52,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2718 states. [2022-11-03 02:45:53,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2718 to 2533. [2022-11-03 02:45:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2533 states, 1955 states have (on average 1.373913043478261) internal successors, (2686), 1970 states have internal predecessors, (2686), 359 states have call successors, (359), 218 states have call predecessors, (359), 217 states have return successors, (462), 346 states have call predecessors, (462), 358 states have call successors, (462) [2022-11-03 02:45:53,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2533 states to 2533 states and 3507 transitions. [2022-11-03 02:45:53,153 INFO L78 Accepts]: Start accepts. Automaton has 2533 states and 3507 transitions. Word has length 102 [2022-11-03 02:45:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:53,154 INFO L495 AbstractCegarLoop]: Abstraction has 2533 states and 3507 transitions. [2022-11-03 02:45:53,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:45:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2533 states and 3507 transitions. [2022-11-03 02:45:53,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-03 02:45:53,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:53,161 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:53,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:53,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 02:45:53,387 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:53,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:53,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1967256814, now seen corresponding path program 1 times [2022-11-03 02:45:53,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:53,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624255556] [2022-11-03 02:45:53,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:53,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-03 02:45:53,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:53,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624255556] [2022-11-03 02:45:53,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624255556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:53,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138862772] [2022-11-03 02:45:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:53,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:53,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:53,589 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:53,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:45:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:53,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 02:45:53,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:45:53,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:53,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138862772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:53,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:53,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-03 02:45:53,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724617773] [2022-11-03 02:45:53,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:53,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:45:53,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:53,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:45:53,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:45:53,889 INFO L87 Difference]: Start difference. First operand 2533 states and 3507 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:45:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:54,438 INFO L93 Difference]: Finished difference Result 3082 states and 4132 transitions. [2022-11-03 02:45:54,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:45:54,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-03 02:45:54,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:54,466 INFO L225 Difference]: With dead ends: 3082 [2022-11-03 02:45:54,467 INFO L226 Difference]: Without dead ends: 2489 [2022-11-03 02:45:54,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:45:54,471 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 66 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:54,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1091 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:45:54,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2022-11-03 02:45:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 2397. [2022-11-03 02:45:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 1855 states have (on average 1.3849056603773584) internal successors, (2569), 1870 states have internal predecessors, (2569), 340 states have call successors, (340), 201 states have call predecessors, (340), 200 states have return successors, (443), 327 states have call predecessors, (443), 339 states have call successors, (443) [2022-11-03 02:45:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 3352 transitions. [2022-11-03 02:45:54,917 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 3352 transitions. Word has length 112 [2022-11-03 02:45:54,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:54,918 INFO L495 AbstractCegarLoop]: Abstraction has 2397 states and 3352 transitions. [2022-11-03 02:45:54,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-03 02:45:54,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 3352 transitions. [2022-11-03 02:45:54,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 02:45:54,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:54,928 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:45:54,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:55,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:45:55,145 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:55,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:55,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1194872042, now seen corresponding path program 1 times [2022-11-03 02:45:55,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:55,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462898059] [2022-11-03 02:45:55,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:55,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:55,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 02:45:55,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:55,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462898059] [2022-11-03 02:45:55,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462898059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:55,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:45:55,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:45:55,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931201236] [2022-11-03 02:45:55,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:55,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:45:55,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:55,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:45:55,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:45:55,263 INFO L87 Difference]: Start difference. First operand 2397 states and 3352 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-11-03 02:45:55,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:55,875 INFO L93 Difference]: Finished difference Result 5954 states and 8789 transitions. [2022-11-03 02:45:55,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:45:55,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 106 [2022-11-03 02:45:55,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:55,894 INFO L225 Difference]: With dead ends: 5954 [2022-11-03 02:45:55,894 INFO L226 Difference]: Without dead ends: 4131 [2022-11-03 02:45:55,905 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 [2022-11-03 02:45:55,905 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 197 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:55,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 311 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:45:55,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2022-11-03 02:45:56,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 4101. [2022-11-03 02:45:56,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4101 states, 3195 states have (on average 1.3974960876369327) internal successors, (4465), 3222 states have internal predecessors, (4465), 576 states have call successors, (576), 329 states have call predecessors, (576), 328 states have return successors, (767), 551 states have call predecessors, (767), 575 states have call successors, (767) [2022-11-03 02:45:56,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4101 states to 4101 states and 5808 transitions. [2022-11-03 02:45:56,432 INFO L78 Accepts]: Start accepts. Automaton has 4101 states and 5808 transitions. Word has length 106 [2022-11-03 02:45:56,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:56,433 INFO L495 AbstractCegarLoop]: Abstraction has 4101 states and 5808 transitions. [2022-11-03 02:45:56,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2022-11-03 02:45:56,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4101 states and 5808 transitions. [2022-11-03 02:45:56,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-03 02:45:56,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:56,446 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:56,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-03 02:45:56,447 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:56,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:56,447 INFO L85 PathProgramCache]: Analyzing trace with hash 476990959, now seen corresponding path program 1 times [2022-11-03 02:45:56,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:56,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499776360] [2022-11-03 02:45:56,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:56,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 02:45:56,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:56,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499776360] [2022-11-03 02:45:56,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499776360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:56,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804260181] [2022-11-03 02:45:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:56,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:56,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:56,651 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:56,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:45:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:56,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:45:56,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:45:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:45:56,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:45:56,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804260181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:45:56,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:45:56,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-03 02:45:56,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031081564] [2022-11-03 02:45:56,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:45:56,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:45:56,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:45:56,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:45:56,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:45:56,899 INFO L87 Difference]: Start difference. First operand 4101 states and 5808 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:45:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:45:57,679 INFO L93 Difference]: Finished difference Result 4850 states and 6653 transitions. [2022-11-03 02:45:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:45:57,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-03 02:45:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:45:57,697 INFO L225 Difference]: With dead ends: 4850 [2022-11-03 02:45:57,697 INFO L226 Difference]: Without dead ends: 4393 [2022-11-03 02:45:57,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:45:57,702 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 185 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:45:57,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 970 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:45:57,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2022-11-03 02:45:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 4359. [2022-11-03 02:45:58,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 3357 states have (on average 1.3836759011021746) internal successors, (4645), 3390 states have internal predecessors, (4645), 624 states have call successors, (624), 371 states have call predecessors, (624), 376 states have return successors, (827), 599 states have call predecessors, (827), 623 states have call successors, (827) [2022-11-03 02:45:58,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 6096 transitions. [2022-11-03 02:45:58,244 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 6096 transitions. Word has length 113 [2022-11-03 02:45:58,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:45:58,245 INFO L495 AbstractCegarLoop]: Abstraction has 4359 states and 6096 transitions. [2022-11-03 02:45:58,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:45:58,245 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 6096 transitions. [2022-11-03 02:45:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 02:45:58,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:45:58,258 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:45:58,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:45:58,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:58,475 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:45:58,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:45:58,475 INFO L85 PathProgramCache]: Analyzing trace with hash 39534973, now seen corresponding path program 1 times [2022-11-03 02:45:58,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:45:58,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833228491] [2022-11-03 02:45:58,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:58,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:45:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 02:45:59,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:45:59,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833228491] [2022-11-03 02:45:59,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833228491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:45:59,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341741455] [2022-11-03 02:45:59,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:45:59,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:45:59,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:45:59,624 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:45:59,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:45:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:45:59,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-03 02:45:59,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:46:01,043 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:46:01,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:46:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:46:03,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341741455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:46:03,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1346247140] [2022-11-03 02:46:03,448 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-03 02:46:03,448 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:46:03,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:46:03,449 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:46:03,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:46:30,350 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 212 for LOIs [2022-11-03 02:46:30,666 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 163 for LOIs [2022-11-03 02:46:30,702 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 154 for LOIs [2022-11-03 02:46:30,740 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 224 for LOIs [2022-11-03 02:46:32,028 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 132 for LOIs [2022-11-03 02:46:32,199 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 78 for LOIs [2022-11-03 02:46:32,331 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 216 for LOIs [2022-11-03 02:46:32,882 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2022-11-03 02:46:33,342 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:47:17,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '124766#(and (= ~q_req_up~0 1) (= ~t1_pc~0 0) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (= ~t4_i~0 0) (= ~m_i~0 0) (<= ~t2_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (= ~E_2~0 2) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (= 0 ~t2_st~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:47:17,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:47:17,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:47:17,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 16] total 51 [2022-11-03 02:47:17,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098081522] [2022-11-03 02:47:17,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:47:17,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-03 02:47:17,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:17,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-03 02:47:17,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=10763, Unknown=0, NotChecked=0, Total=11556 [2022-11-03 02:47:17,079 INFO L87 Difference]: Start difference. First operand 4359 states and 6096 transitions. Second operand has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-03 02:47:42,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:42,250 INFO L93 Difference]: Finished difference Result 6870 states and 9012 transitions. [2022-11-03 02:47:42,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2022-11-03 02:47:42,250 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) Word has length 114 [2022-11-03 02:47:42,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:42,270 INFO L225 Difference]: With dead ends: 6870 [2022-11-03 02:47:42,271 INFO L226 Difference]: Without dead ends: 6155 [2022-11-03 02:47:42,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 288 SyntacticMatches, 4 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44279 ImplicationChecksByTransitivity, 63.4s TimeCoverageRelationStatistics Valid=10080, Invalid=99812, Unknown=0, NotChecked=0, Total=109892 [2022-11-03 02:47:42,296 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 4483 mSDsluCounter, 3060 mSDsCounter, 0 mSdLazyCounter, 7401 mSolverCounterSat, 2618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4483 SdHoareTripleChecker+Valid, 2877 SdHoareTripleChecker+Invalid, 10019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2618 IncrementalHoareTripleChecker+Valid, 7401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:42,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4483 Valid, 2877 Invalid, 10019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2618 Valid, 7401 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-11-03 02:47:42,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6155 states. [2022-11-03 02:47:43,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6155 to 4635. [2022-11-03 02:47:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4635 states, 3541 states have (on average 1.3713640214628635) internal successors, (4856), 3576 states have internal predecessors, (4856), 669 states have call successors, (669), 408 states have call predecessors, (669), 423 states have return successors, (884), 652 states have call predecessors, (884), 668 states have call successors, (884) [2022-11-03 02:47:43,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4635 states to 4635 states and 6409 transitions. [2022-11-03 02:47:43,039 INFO L78 Accepts]: Start accepts. Automaton has 4635 states and 6409 transitions. Word has length 114 [2022-11-03 02:47:43,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:43,040 INFO L495 AbstractCegarLoop]: Abstraction has 4635 states and 6409 transitions. [2022-11-03 02:47:43,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 33 states have (on average 5.909090909090909) internal successors, (195), 38 states have internal predecessors, (195), 19 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 19 states have call predecessors, (46), 19 states have call successors, (46) [2022-11-03 02:47:43,041 INFO L276 IsEmpty]: Start isEmpty. Operand 4635 states and 6409 transitions. [2022-11-03 02:47:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-03 02:47:43,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:43,055 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:43,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:43,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-03 02:47:43,283 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:43,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:43,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2015303110, now seen corresponding path program 1 times [2022-11-03 02:47:43,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:43,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706084605] [2022-11-03 02:47:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:43,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-03 02:47:43,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:43,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706084605] [2022-11-03 02:47:43,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706084605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:43,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442306773] [2022-11-03 02:47:43,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:43,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:43,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:43,701 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:43,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 02:47:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:43,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:47:43,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:47:43,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:47:44,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442306773] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:44,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:47:44,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-03 02:47:44,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586828125] [2022-11-03 02:47:44,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:47:44,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:47:44,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:47:44,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:47:44,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-03 02:47:44,274 INFO L87 Difference]: Start difference. First operand 4635 states and 6409 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:47:45,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:47:45,820 INFO L93 Difference]: Finished difference Result 5959 states and 7957 transitions. [2022-11-03 02:47:45,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 02:47:45,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-03 02:47:45,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:47:45,841 INFO L225 Difference]: With dead ends: 5959 [2022-11-03 02:47:45,841 INFO L226 Difference]: Without dead ends: 4968 [2022-11-03 02:47:45,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:47:45,846 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 328 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:47:45,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 496 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:47:45,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4968 states. [2022-11-03 02:47:46,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4968 to 4715. [2022-11-03 02:47:46,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4715 states, 3586 states have (on average 1.368377021751255) internal successors, (4907), 3624 states have internal predecessors, (4907), 688 states have call successors, (688), 417 states have call predecessors, (688), 439 states have return successors, (924), 675 states have call predecessors, (924), 687 states have call successors, (924) [2022-11-03 02:47:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4715 states to 4715 states and 6519 transitions. [2022-11-03 02:47:46,566 INFO L78 Accepts]: Start accepts. Automaton has 4715 states and 6519 transitions. Word has length 115 [2022-11-03 02:47:46,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:47:46,567 INFO L495 AbstractCegarLoop]: Abstraction has 4715 states and 6519 transitions. [2022-11-03 02:47:46,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:47:46,567 INFO L276 IsEmpty]: Start isEmpty. Operand 4715 states and 6519 transitions. [2022-11-03 02:47:46,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 02:47:46,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:47:46,585 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:47:46,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:47:46,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-03 02:47:46,811 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:47:46,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:47:46,811 INFO L85 PathProgramCache]: Analyzing trace with hash 762089149, now seen corresponding path program 1 times [2022-11-03 02:47:46,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:47:46,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623783307] [2022-11-03 02:47:46,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:46,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:47:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:47:48,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:47:48,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623783307] [2022-11-03 02:47:48,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623783307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:47:48,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646151532] [2022-11-03 02:47:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:47:48,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:47:48,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:47:48,027 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:47:48,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 02:47:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:47:48,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-03 02:47:48,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:47:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:47:49,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:47:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:47:51,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646151532] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:47:51,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [664973511] [2022-11-03 02:47:51,315 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-03 02:47:51,316 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:47:51,316 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:47:51,316 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:47:51,316 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:47:59,809 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 212 for LOIs [2022-11-03 02:48:00,171 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 161 for LOIs [2022-11-03 02:48:00,203 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 80 for LOIs [2022-11-03 02:48:00,210 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 224 for LOIs [2022-11-03 02:48:01,533 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 132 for LOIs [2022-11-03 02:48:01,692 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 80 for LOIs [2022-11-03 02:48:01,817 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 216 for LOIs [2022-11-03 02:48:02,179 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2022-11-03 02:48:02,482 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:48:43,595 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '158896#(and (= ~q_req_up~0 1) (= ~E_4~0 2) (= ~t1_pc~0 0) (= ~T4_E~0 2) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t4_i~0 0) (= ~c_dr_pc~0 1) (= ~c_num_read~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= 0 ~t2_st~0) (<= ~t4_pc~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (<= 0 ~t4_pc~0) (= ~M_E~0 2) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (= ~c_dr_st~0 1) (<= 0 ~t1_st~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-03 02:48:43,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:48:43,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:48:43,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 18] total 55 [2022-11-03 02:48:43,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678115734] [2022-11-03 02:48:43,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:48:43,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-03 02:48:43,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:48:43,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-03 02:48:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=959, Invalid=11697, Unknown=0, NotChecked=0, Total=12656 [2022-11-03 02:48:43,601 INFO L87 Difference]: Start difference. First operand 4715 states and 6519 transitions. Second operand has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-03 02:49:02,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:02,737 INFO L93 Difference]: Finished difference Result 6999 states and 9221 transitions. [2022-11-03 02:49:02,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-11-03 02:49:02,739 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) Word has length 124 [2022-11-03 02:49:02,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:02,759 INFO L225 Difference]: With dead ends: 6999 [2022-11-03 02:49:02,759 INFO L226 Difference]: Without dead ends: 5928 [2022-11-03 02:49:02,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26863 ImplicationChecksByTransitivity, 53.4s TimeCoverageRelationStatistics Valid=6757, Invalid=62675, Unknown=0, NotChecked=0, Total=69432 [2022-11-03 02:49:02,772 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 5418 mSDsluCounter, 2552 mSDsCounter, 0 mSdLazyCounter, 7511 mSolverCounterSat, 3910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5418 SdHoareTripleChecker+Valid, 2435 SdHoareTripleChecker+Invalid, 11421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3910 IncrementalHoareTripleChecker+Valid, 7511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:02,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5418 Valid, 2435 Invalid, 11421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3910 Valid, 7511 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-11-03 02:49:02,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5928 states. [2022-11-03 02:49:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5928 to 4531. [2022-11-03 02:49:03,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4531 states, 3474 states have (on average 1.3756476683937824) internal successors, (4779), 3511 states have internal predecessors, (4779), 648 states have call successors, (648), 385 states have call predecessors, (648), 407 states have return successors, (874), 636 states have call predecessors, (874), 647 states have call successors, (874) [2022-11-03 02:49:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4531 states to 4531 states and 6301 transitions. [2022-11-03 02:49:03,566 INFO L78 Accepts]: Start accepts. Automaton has 4531 states and 6301 transitions. Word has length 124 [2022-11-03 02:49:03,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:03,567 INFO L495 AbstractCegarLoop]: Abstraction has 4531 states and 6301 transitions. [2022-11-03 02:49:03,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 36 states have (on average 5.944444444444445) internal successors, (214), 40 states have internal predecessors, (214), 25 states have call successors, (49), 17 states have call predecessors, (49), 22 states have return successors, (51), 24 states have call predecessors, (51), 25 states have call successors, (51) [2022-11-03 02:49:03,567 INFO L276 IsEmpty]: Start isEmpty. Operand 4531 states and 6301 transitions. [2022-11-03 02:49:03,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:49:03,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:03,583 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:03,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:03,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:03,799 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:03,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:03,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1096477350, now seen corresponding path program 1 times [2022-11-03 02:49:03,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:03,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771613784] [2022-11-03 02:49:03,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:03,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:49:04,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:04,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771613784] [2022-11-03 02:49:04,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771613784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:04,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357334022] [2022-11-03 02:49:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:04,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:04,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:04,019 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:04,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 02:49:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:04,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 02:49:04,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 02:49:04,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:49:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-03 02:49:04,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357334022] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:04,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:49:04,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-03 02:49:04,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930671546] [2022-11-03 02:49:04,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:04,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 02:49:04,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:04,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 02:49:04,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:49:04,558 INFO L87 Difference]: Start difference. First operand 4531 states and 6301 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:49:05,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:05,883 INFO L93 Difference]: Finished difference Result 5186 states and 7042 transitions. [2022-11-03 02:49:05,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:49:05,884 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-03 02:49:05,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:05,901 INFO L225 Difference]: With dead ends: 5186 [2022-11-03 02:49:05,901 INFO L226 Difference]: Without dead ends: 4299 [2022-11-03 02:49:05,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-03 02:49:05,907 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 479 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:05,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 551 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:49:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4299 states. [2022-11-03 02:49:06,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4299 to 4262. [2022-11-03 02:49:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4262 states, 3275 states have (on average 1.3844274809160306) internal successors, (4534), 3312 states have internal predecessors, (4534), 612 states have call successors, (612), 355 states have call predecessors, (612), 373 states have return successors, (833), 596 states have call predecessors, (833), 611 states have call successors, (833) [2022-11-03 02:49:06,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4262 states to 4262 states and 5979 transitions. [2022-11-03 02:49:06,805 INFO L78 Accepts]: Start accepts. Automaton has 4262 states and 5979 transitions. Word has length 125 [2022-11-03 02:49:06,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:06,806 INFO L495 AbstractCegarLoop]: Abstraction has 4262 states and 5979 transitions. [2022-11-03 02:49:06,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-03 02:49:06,806 INFO L276 IsEmpty]: Start isEmpty. Operand 4262 states and 5979 transitions. [2022-11-03 02:49:06,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 02:49:06,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:06,820 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:06,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:07,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-03 02:49:07,047 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:07,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:07,047 INFO L85 PathProgramCache]: Analyzing trace with hash 727031283, now seen corresponding path program 1 times [2022-11-03 02:49:07,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:07,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367705748] [2022-11-03 02:49:07,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:07,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 02:49:07,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:07,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367705748] [2022-11-03 02:49:07,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367705748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:07,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156660459] [2022-11-03 02:49:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:07,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:07,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:07,158 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:07,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 02:49:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:07,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:49:07,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 02:49:07,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:07,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156660459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:07,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:07,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:49:07,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212213363] [2022-11-03 02:49:07,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:07,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:49:07,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:07,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:49:07,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:07,413 INFO L87 Difference]: Start difference. First operand 4262 states and 5979 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2022-11-03 02:49:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:08,353 INFO L93 Difference]: Finished difference Result 7241 states and 10348 transitions. [2022-11-03 02:49:08,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:49:08,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 123 [2022-11-03 02:49:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:08,370 INFO L225 Difference]: With dead ends: 7241 [2022-11-03 02:49:08,370 INFO L226 Difference]: Without dead ends: 5147 [2022-11-03 02:49:08,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:08,380 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 192 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:08,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 234 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:08,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2022-11-03 02:49:09,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 5147. [2022-11-03 02:49:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5147 states, 4045 states have (on average 1.3567367119901113) internal successors, (5488), 4082 states have internal predecessors, (5488), 649 states have call successors, (649), 432 states have call predecessors, (649), 451 states have return successors, (900), 634 states have call predecessors, (900), 648 states have call successors, (900) [2022-11-03 02:49:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5147 states to 5147 states and 7037 transitions. [2022-11-03 02:49:09,209 INFO L78 Accepts]: Start accepts. Automaton has 5147 states and 7037 transitions. Word has length 123 [2022-11-03 02:49:09,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:09,209 INFO L495 AbstractCegarLoop]: Abstraction has 5147 states and 7037 transitions. [2022-11-03 02:49:09,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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) [2022-11-03 02:49:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 5147 states and 7037 transitions. [2022-11-03 02:49:09,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 02:49:09,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:09,223 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:09,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:09,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-03 02:49:09,451 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:09,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash -244643404, now seen corresponding path program 1 times [2022-11-03 02:49:09,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:09,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588756976] [2022-11-03 02:49:09,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:09,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:09,555 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:49:09,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:09,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588756976] [2022-11-03 02:49:09,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588756976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:09,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302300736] [2022-11-03 02:49:09,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:09,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:09,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:09,559 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:09,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 02:49:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:09,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:49:09,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:49:09,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:09,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302300736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:09,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:09,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:49:09,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445258332] [2022-11-03 02:49:09,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:09,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:49:09,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:09,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:49:09,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:09,788 INFO L87 Difference]: Start difference. First operand 5147 states and 7037 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2022-11-03 02:49:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:10,731 INFO L93 Difference]: Finished difference Result 9096 states and 12799 transitions. [2022-11-03 02:49:10,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:49:10,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 123 [2022-11-03 02:49:10,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:10,754 INFO L225 Difference]: With dead ends: 9096 [2022-11-03 02:49:10,755 INFO L226 Difference]: Without dead ends: 6832 [2022-11-03 02:49:10,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:10,766 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 81 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:10,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 463 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:10,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2022-11-03 02:49:11,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 5745. [2022-11-03 02:49:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5745 states, 4587 states have (on average 1.3908872901678657) internal successors, (6380), 4624 states have internal predecessors, (6380), 677 states have call successors, (677), 460 states have call predecessors, (677), 479 states have return successors, (928), 662 states have call predecessors, (928), 676 states have call successors, (928) [2022-11-03 02:49:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5745 states to 5745 states and 7985 transitions. [2022-11-03 02:49:11,907 INFO L78 Accepts]: Start accepts. Automaton has 5745 states and 7985 transitions. Word has length 123 [2022-11-03 02:49:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:11,907 INFO L495 AbstractCegarLoop]: Abstraction has 5745 states and 7985 transitions. [2022-11-03 02:49:11,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2022-11-03 02:49:11,908 INFO L276 IsEmpty]: Start isEmpty. Operand 5745 states and 7985 transitions. [2022-11-03 02:49:11,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-03 02:49:11,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:11,918 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:11,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:12,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:12,119 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:12,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1426348430, now seen corresponding path program 2 times [2022-11-03 02:49:12,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:12,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755700035] [2022-11-03 02:49:12,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:12,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:12,359 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:49:12,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:12,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755700035] [2022-11-03 02:49:12,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755700035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:12,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307486665] [2022-11-03 02:49:12,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:49:12,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:12,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:12,361 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:12,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 02:49:12,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:49:12,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:49:12,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:49:12,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:49:12,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:12,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307486665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:12,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:12,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:49:12,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118392039] [2022-11-03 02:49:12,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:12,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:49:12,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:12,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:49:12,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:12,578 INFO L87 Difference]: Start difference. First operand 5745 states and 7985 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, (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) [2022-11-03 02:49:13,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:13,978 INFO L93 Difference]: Finished difference Result 10858 states and 15656 transitions. [2022-11-03 02:49:13,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:49:13,978 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, (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 123 [2022-11-03 02:49:13,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:14,001 INFO L225 Difference]: With dead ends: 10858 [2022-11-03 02:49:14,002 INFO L226 Difference]: Without dead ends: 7881 [2022-11-03 02:49:14,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:14,016 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 103 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:14,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 473 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7881 states. [2022-11-03 02:49:15,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7881 to 7735. [2022-11-03 02:49:15,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7735 states, 6214 states have (on average 1.3931445123913744) internal successors, (8657), 6259 states have internal predecessors, (8657), 895 states have call successors, (895), 606 states have call predecessors, (895), 624 states have return successors, (1341), 871 states have call predecessors, (1341), 894 states have call successors, (1341) [2022-11-03 02:49:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7735 states to 7735 states and 10893 transitions. [2022-11-03 02:49:15,162 INFO L78 Accepts]: Start accepts. Automaton has 7735 states and 10893 transitions. Word has length 123 [2022-11-03 02:49:15,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:15,162 INFO L495 AbstractCegarLoop]: Abstraction has 7735 states and 10893 transitions. [2022-11-03 02:49:15,162 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, (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) [2022-11-03 02:49:15,162 INFO L276 IsEmpty]: Start isEmpty. Operand 7735 states and 10893 transitions. [2022-11-03 02:49:15,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:49:15,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:15,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:15,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:15,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-03 02:49:15,371 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:15,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:15,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1940333449, now seen corresponding path program 1 times [2022-11-03 02:49:15,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:15,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791548759] [2022-11-03 02:49:15,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:15,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 02:49:15,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:15,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791548759] [2022-11-03 02:49:15,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791548759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:15,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299614316] [2022-11-03 02:49:15,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:15,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:15,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:15,480 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:15,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 02:49:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:15,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:49:15,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:49:15,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:15,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299614316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:15,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:15,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:49:15,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3841793] [2022-11-03 02:49:15,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:15,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:49:15,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:15,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:49:15,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:15,684 INFO L87 Difference]: Start difference. First operand 7735 states and 10893 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-03 02:49:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:17,067 INFO L93 Difference]: Finished difference Result 13698 states and 19834 transitions. [2022-11-03 02:49:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:49:17,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 120 [2022-11-03 02:49:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:17,098 INFO L225 Difference]: With dead ends: 13698 [2022-11-03 02:49:17,098 INFO L226 Difference]: Without dead ends: 10074 [2022-11-03 02:49:17,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:17,112 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 69 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:17,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 453 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:17,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10074 states. [2022-11-03 02:49:18,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10074 to 8937. [2022-11-03 02:49:18,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8937 states, 7296 states have (on average 1.4280427631578947) internal successors, (10419), 7341 states have internal predecessors, (10419), 955 states have call successors, (955), 666 states have call predecessors, (955), 684 states have return successors, (1401), 931 states have call predecessors, (1401), 954 states have call successors, (1401) [2022-11-03 02:49:18,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8937 states to 8937 states and 12775 transitions. [2022-11-03 02:49:18,607 INFO L78 Accepts]: Start accepts. Automaton has 8937 states and 12775 transitions. Word has length 120 [2022-11-03 02:49:18,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:18,608 INFO L495 AbstractCegarLoop]: Abstraction has 8937 states and 12775 transitions. [2022-11-03 02:49:18,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-03 02:49:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 8937 states and 12775 transitions. [2022-11-03 02:49:18,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:49:18,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:18,617 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:49:18,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:18,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-03 02:49:18,817 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:18,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:18,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2116319074, now seen corresponding path program 1 times [2022-11-03 02:49:18,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:18,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254617059] [2022-11-03 02:49:18,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:18,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:49:18,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:18,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254617059] [2022-11-03 02:49:18,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254617059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:18,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057820611] [2022-11-03 02:49:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:18,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:18,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:18,927 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:18,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 02:49:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:19,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 02:49:19,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 02:49:19,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:19,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057820611] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:19,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:19,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 02:49:19,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695839285] [2022-11-03 02:49:19,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:19,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:49:19,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:19,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:49:19,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:19,156 INFO L87 Difference]: Start difference. First operand 8937 states and 12775 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-03 02:49:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:20,915 INFO L93 Difference]: Finished difference Result 16148 states and 23580 transitions. [2022-11-03 02:49:20,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:49:20,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 120 [2022-11-03 02:49:20,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:20,951 INFO L225 Difference]: With dead ends: 16148 [2022-11-03 02:49:20,951 INFO L226 Difference]: Without dead ends: 11938 [2022-11-03 02:49:20,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:49:20,964 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 75 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:20,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 458 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11938 states. [2022-11-03 02:49:22,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11938 to 10605. [2022-11-03 02:49:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10605 states, 8784 states have (on average 1.4562841530054644) internal successors, (12792), 8829 states have internal predecessors, (12792), 1045 states have call successors, (1045), 756 states have call predecessors, (1045), 774 states have return successors, (1491), 1021 states have call predecessors, (1491), 1044 states have call successors, (1491) [2022-11-03 02:49:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10605 states to 10605 states and 15328 transitions. [2022-11-03 02:49:22,901 INFO L78 Accepts]: Start accepts. Automaton has 10605 states and 15328 transitions. Word has length 120 [2022-11-03 02:49:22,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:22,902 INFO L495 AbstractCegarLoop]: Abstraction has 10605 states and 15328 transitions. [2022-11-03 02:49:22,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-03 02:49:22,903 INFO L276 IsEmpty]: Start isEmpty. Operand 10605 states and 15328 transitions. [2022-11-03 02:49:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:49:22,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:22,918 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:22,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:23,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-03 02:49:23,118 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:23,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:23,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1459529591, now seen corresponding path program 2 times [2022-11-03 02:49:23,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:23,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663001561] [2022-11-03 02:49:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:23,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:49:23,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:23,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663001561] [2022-11-03 02:49:23,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663001561] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095692358] [2022-11-03 02:49:23,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:49:23,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:23,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:23,427 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:23,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 02:49:23,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 02:49:23,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:49:23,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:49:23,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:49:23,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:23,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095692358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:23,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:23,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:49:23,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571768471] [2022-11-03 02:49:23,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:23,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:49:23,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:23,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:49:23,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:23,621 INFO L87 Difference]: Start difference. First operand 10605 states and 15328 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:49:25,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:25,072 INFO L93 Difference]: Finished difference Result 16573 states and 24684 transitions. [2022-11-03 02:49:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:49:25,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 120 [2022-11-03 02:49:25,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:25,093 INFO L225 Difference]: With dead ends: 16573 [2022-11-03 02:49:25,093 INFO L226 Difference]: Without dead ends: 10635 [2022-11-03 02:49:25,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:25,106 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 118 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:25,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 464 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10635 states. [2022-11-03 02:49:26,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10635 to 10481. [2022-11-03 02:49:26,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10481 states, 8660 states have (on average 1.4355658198614318) internal successors, (12432), 8705 states have internal predecessors, (12432), 1045 states have call successors, (1045), 756 states have call predecessors, (1045), 774 states have return successors, (1491), 1021 states have call predecessors, (1491), 1044 states have call successors, (1491) [2022-11-03 02:49:26,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10481 states to 10481 states and 14968 transitions. [2022-11-03 02:49:26,518 INFO L78 Accepts]: Start accepts. Automaton has 10481 states and 14968 transitions. Word has length 120 [2022-11-03 02:49:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:26,518 INFO L495 AbstractCegarLoop]: Abstraction has 10481 states and 14968 transitions. [2022-11-03 02:49:26,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:49:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 10481 states and 14968 transitions. [2022-11-03 02:49:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:49:26,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:26,529 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:49:26,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:26,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:26,730 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:26,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:26,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1760218041, now seen corresponding path program 1 times [2022-11-03 02:49:26,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:26,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476907968] [2022-11-03 02:49:26,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:26,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 02:49:26,960 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:26,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476907968] [2022-11-03 02:49:26,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476907968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:26,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511770497] [2022-11-03 02:49:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:26,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:26,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:26,963 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:26,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 02:49:27,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:27,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:49:27,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 02:49:27,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:27,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511770497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:27,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:27,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:49:27,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292589452] [2022-11-03 02:49:27,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:27,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:49:27,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:27,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:49:27,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:27,195 INFO L87 Difference]: Start difference. First operand 10481 states and 14968 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-03 02:49:29,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:29,471 INFO L93 Difference]: Finished difference Result 24889 states and 36340 transitions. [2022-11-03 02:49:29,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:49:29,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 120 [2022-11-03 02:49:29,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:29,511 INFO L225 Difference]: With dead ends: 24889 [2022-11-03 02:49:29,511 INFO L226 Difference]: Without dead ends: 15144 [2022-11-03 02:49:29,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:29,530 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 59 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:29,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 395 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:29,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15144 states. [2022-11-03 02:49:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15144 to 12568. [2022-11-03 02:49:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12568 states, 10527 states have (on average 1.4583452075615084) internal successors, (15352), 10573 states have internal predecessors, (15352), 1155 states have call successors, (1155), 866 states have call predecessors, (1155), 884 states have return successors, (1601), 1130 states have call predecessors, (1601), 1154 states have call successors, (1601) [2022-11-03 02:49:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12568 states to 12568 states and 18108 transitions. [2022-11-03 02:49:31,624 INFO L78 Accepts]: Start accepts. Automaton has 12568 states and 18108 transitions. Word has length 120 [2022-11-03 02:49:31,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:31,625 INFO L495 AbstractCegarLoop]: Abstraction has 12568 states and 18108 transitions. [2022-11-03 02:49:31,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2022-11-03 02:49:31,625 INFO L276 IsEmpty]: Start isEmpty. Operand 12568 states and 18108 transitions. [2022-11-03 02:49:31,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:49:31,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:31,642 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:31,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:31,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:31,855 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:31,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:31,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1368513566, now seen corresponding path program 1 times [2022-11-03 02:49:31,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:31,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626117898] [2022-11-03 02:49:31,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:31,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:49:32,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:32,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626117898] [2022-11-03 02:49:32,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626117898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:32,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558669617] [2022-11-03 02:49:32,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:32,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:32,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:32,096 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:32,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 02:49:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:32,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:49:32,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 02:49:32,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:32,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558669617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:32,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:32,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-03 02:49:32,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847001899] [2022-11-03 02:49:32,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:32,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:49:32,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:32,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:49:32,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:49:32,358 INFO L87 Difference]: Start difference. First operand 12568 states and 18108 transitions. Second operand has 6 states, 5 states have (on average 15.6) internal successors, (78), 6 states have internal predecessors, (78), 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) [2022-11-03 02:49:35,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:35,084 INFO L93 Difference]: Finished difference Result 28756 states and 41644 transitions. [2022-11-03 02:49:35,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:49:35,085 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 15.6) internal successors, (78), 6 states have internal predecessors, (78), 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 121 [2022-11-03 02:49:35,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:35,122 INFO L225 Difference]: With dead ends: 28756 [2022-11-03 02:49:35,122 INFO L226 Difference]: Without dead ends: 16924 [2022-11-03 02:49:35,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:49:35,141 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 431 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:35,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 467 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:49:35,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16924 states. [2022-11-03 02:49:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16924 to 16922. [2022-11-03 02:49:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16922 states, 14127 states have (on average 1.435690521696043) internal successors, (20282), 14189 states have internal predecessors, (20282), 1592 states have call successors, (1592), 1183 states have call predecessors, (1592), 1201 states have return successors, (2227), 1551 states have call predecessors, (2227), 1591 states have call successors, (2227) [2022-11-03 02:49:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16922 states to 16922 states and 24101 transitions. [2022-11-03 02:49:37,436 INFO L78 Accepts]: Start accepts. Automaton has 16922 states and 24101 transitions. Word has length 121 [2022-11-03 02:49:37,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:37,436 INFO L495 AbstractCegarLoop]: Abstraction has 16922 states and 24101 transitions. [2022-11-03 02:49:37,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 15.6) internal successors, (78), 6 states have internal predecessors, (78), 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) [2022-11-03 02:49:37,436 INFO L276 IsEmpty]: Start isEmpty. Operand 16922 states and 24101 transitions. [2022-11-03 02:49:37,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 02:49:37,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:37,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:49:37,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:37,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-03 02:49:37,671 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:37,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:37,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1072248399, now seen corresponding path program 1 times [2022-11-03 02:49:37,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:37,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965212279] [2022-11-03 02:49:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:37,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:38,009 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:49:38,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:38,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965212279] [2022-11-03 02:49:38,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965212279] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:38,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980715915] [2022-11-03 02:49:38,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:38,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:38,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:38,012 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:38,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:49:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:38,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:49:38,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 02:49:38,297 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:38,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980715915] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:38,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:38,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-03 02:49:38,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682967248] [2022-11-03 02:49:38,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:38,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:49:38,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:38,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:49:38,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:49:38,299 INFO L87 Difference]: Start difference. First operand 16922 states and 24101 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2022-11-03 02:49:42,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:42,578 INFO L93 Difference]: Finished difference Result 37394 states and 53303 transitions. [2022-11-03 02:49:42,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:49:42,579 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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 121 [2022-11-03 02:49:42,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:42,626 INFO L225 Difference]: With dead ends: 37394 [2022-11-03 02:49:42,626 INFO L226 Difference]: Without dead ends: 21208 [2022-11-03 02:49:42,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:49:42,656 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 427 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:42,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 476 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:49:42,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21208 states. [2022-11-03 02:49:46,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21208 to 21206. [2022-11-03 02:49:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21206 states, 17691 states have (on average 1.40172969306427) internal successors, (24798), 17765 states have internal predecessors, (24798), 2004 states have call successors, (2004), 1491 states have call predecessors, (2004), 1509 states have return successors, (2713), 1951 states have call predecessors, (2713), 2003 states have call successors, (2713) [2022-11-03 02:49:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21206 states to 21206 states and 29515 transitions. [2022-11-03 02:49:46,410 INFO L78 Accepts]: Start accepts. Automaton has 21206 states and 29515 transitions. Word has length 121 [2022-11-03 02:49:46,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:46,410 INFO L495 AbstractCegarLoop]: Abstraction has 21206 states and 29515 transitions. [2022-11-03 02:49:46,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 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) [2022-11-03 02:49:46,410 INFO L276 IsEmpty]: Start isEmpty. Operand 21206 states and 29515 transitions. [2022-11-03 02:49:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-03 02:49:46,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:46,429 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, 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] [2022-11-03 02:49:46,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:46,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-03 02:49:46,630 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:46,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:46,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1069629383, now seen corresponding path program 1 times [2022-11-03 02:49:46,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:46,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665195160] [2022-11-03 02:49:46,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:46,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:46,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:49:46,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:46,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665195160] [2022-11-03 02:49:46,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665195160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:46,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232096797] [2022-11-03 02:49:46,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:46,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:46,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:46,860 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:46,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 02:49:47,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:47,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:49:47,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 02:49:47,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:47,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232096797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:47,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:47,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 02:49:47,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18899278] [2022-11-03 02:49:47,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:47,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:49:47,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:47,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:49:47,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:49:47,111 INFO L87 Difference]: Start difference. First operand 21206 states and 29515 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2022-11-03 02:49:51,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:51,323 INFO L93 Difference]: Finished difference Result 30822 states and 42687 transitions. [2022-11-03 02:49:51,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:49:51,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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 125 [2022-11-03 02:49:51,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:51,380 INFO L225 Difference]: With dead ends: 30822 [2022-11-03 02:49:51,380 INFO L226 Difference]: Without dead ends: 21976 [2022-11-03 02:49:51,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:49:51,397 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 213 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:51,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 625 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:51,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21976 states. [2022-11-03 02:49:54,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21976 to 21599. [2022-11-03 02:49:54,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21599 states, 18025 states have (on average 1.3981692094313454) internal successors, (25202), 18123 states have internal predecessors, (25202), 2011 states have call successors, (2011), 1495 states have call predecessors, (2011), 1561 states have return successors, (2792), 1982 states have call predecessors, (2792), 2010 states have call successors, (2792) [2022-11-03 02:49:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21599 states to 21599 states and 30005 transitions. [2022-11-03 02:49:54,866 INFO L78 Accepts]: Start accepts. Automaton has 21599 states and 30005 transitions. Word has length 125 [2022-11-03 02:49:54,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:49:54,866 INFO L495 AbstractCegarLoop]: Abstraction has 21599 states and 30005 transitions. [2022-11-03 02:49:54,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2022-11-03 02:49:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 21599 states and 30005 transitions. [2022-11-03 02:49:54,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 02:49:54,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:49:54,891 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:49:54,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:49:55,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:55,092 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:49:55,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:49:55,092 INFO L85 PathProgramCache]: Analyzing trace with hash 665889526, now seen corresponding path program 1 times [2022-11-03 02:49:55,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:49:55,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071632067] [2022-11-03 02:49:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:55,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:49:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 02:49:55,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:49:55,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071632067] [2022-11-03 02:49:55,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071632067] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:49:55,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367495758] [2022-11-03 02:49:55,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:49:55,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:49:55,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:49:55,318 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:49:55,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 02:49:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:49:55,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:49:55,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:49:55,497 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 02:49:55,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:49:55,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367495758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:49:55,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:49:55,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 02:49:55,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142636404] [2022-11-03 02:49:55,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:49:55,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:49:55,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:49:55,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:49:55,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:55,500 INFO L87 Difference]: Start difference. First operand 21599 states and 30005 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:49:58,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:49:58,617 INFO L93 Difference]: Finished difference Result 30373 states and 42348 transitions. [2022-11-03 02:49:58,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:49:58,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 126 [2022-11-03 02:49:58,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:49:58,664 INFO L225 Difference]: With dead ends: 30373 [2022-11-03 02:49:58,664 INFO L226 Difference]: Without dead ends: 21175 [2022-11-03 02:49:58,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:49:58,682 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 28 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:49:58,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 391 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:49:58,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21175 states. [2022-11-03 02:50:02,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21175 to 21175. [2022-11-03 02:50:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21175 states, 17649 states have (on average 1.4000793246076264) internal successors, (24710), 17735 states have internal predecessors, (24710), 2011 states have call successors, (2011), 1495 states have call predecessors, (2011), 1513 states have return successors, (2720), 1946 states have call predecessors, (2720), 2010 states have call successors, (2720) [2022-11-03 02:50:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21175 states to 21175 states and 29441 transitions. [2022-11-03 02:50:02,293 INFO L78 Accepts]: Start accepts. Automaton has 21175 states and 29441 transitions. Word has length 126 [2022-11-03 02:50:02,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:02,294 INFO L495 AbstractCegarLoop]: Abstraction has 21175 states and 29441 transitions. [2022-11-03 02:50:02,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 02:50:02,294 INFO L276 IsEmpty]: Start isEmpty. Operand 21175 states and 29441 transitions. [2022-11-03 02:50:02,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 02:50:02,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:02,320 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:50:02,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:02,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-03 02:50:02,521 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:02,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:02,521 INFO L85 PathProgramCache]: Analyzing trace with hash -296455401, now seen corresponding path program 1 times [2022-11-03 02:50:02,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:02,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205611518] [2022-11-03 02:50:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:02,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 02:50:02,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:02,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205611518] [2022-11-03 02:50:02,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205611518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:02,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372772266] [2022-11-03 02:50:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:02,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:02,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:02,810 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:02,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 02:50:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:03,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:50:03,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 02:50:03,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:03,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372772266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:03,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:50:03,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 02:50:03,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679174077] [2022-11-03 02:50:03,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:03,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:50:03,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:03,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:50:03,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:50:03,093 INFO L87 Difference]: Start difference. First operand 21175 states and 29441 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-11-03 02:50:08,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:08,625 INFO L93 Difference]: Finished difference Result 49371 states and 68859 transitions. [2022-11-03 02:50:08,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:50:08,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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 126 [2022-11-03 02:50:08,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:08,696 INFO L225 Difference]: With dead ends: 49371 [2022-11-03 02:50:08,696 INFO L226 Difference]: Without dead ends: 28977 [2022-11-03 02:50:08,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:50:08,726 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 451 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:08,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 459 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:50:08,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28977 states. [2022-11-03 02:50:13,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28977 to 28975. [2022-11-03 02:50:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28975 states, 24070 states have (on average 1.380099709181554) internal successors, (33219), 24192 states have internal predecessors, (33219), 2810 states have call successors, (2810), 2075 states have call predecessors, (2810), 2093 states have return successors, (3824), 2709 states have call predecessors, (3824), 2809 states have call successors, (3824) [2022-11-03 02:50:13,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28975 states to 28975 states and 39853 transitions. [2022-11-03 02:50:13,989 INFO L78 Accepts]: Start accepts. Automaton has 28975 states and 39853 transitions. Word has length 126 [2022-11-03 02:50:13,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:50:13,989 INFO L495 AbstractCegarLoop]: Abstraction has 28975 states and 39853 transitions. [2022-11-03 02:50:13,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 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) [2022-11-03 02:50:13,990 INFO L276 IsEmpty]: Start isEmpty. Operand 28975 states and 39853 transitions. [2022-11-03 02:50:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-03 02:50:14,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:50:14,018 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-03 02:50:14,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:50:14,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-03 02:50:14,220 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:50:14,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:50:14,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1628126257, now seen corresponding path program 1 times [2022-11-03 02:50:14,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:50:14,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003039616] [2022-11-03 02:50:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:14,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:50:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 02:50:14,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:50:14,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003039616] [2022-11-03 02:50:14,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003039616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:50:14,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158779242] [2022-11-03 02:50:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:50:14,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:50:14,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:50:14,516 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:50:14,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408df629-df89-4b5f-ba26-409e9b4d049c/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 02:50:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:50:14,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 689 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:50:14,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:50:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 02:50:14,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:50:14,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158779242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:50:14,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:50:14,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 02:50:14,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823125434] [2022-11-03 02:50:14,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:50:14,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:50:14,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:50:14,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:50:14,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:50:14,763 INFO L87 Difference]: Start difference. First operand 28975 states and 39853 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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) [2022-11-03 02:50:21,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:50:21,436 INFO L93 Difference]: Finished difference Result 67891 states and 93432 transitions. [2022-11-03 02:50:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:50:21,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 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 128 [2022-11-03 02:50:21,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:50:21,543 INFO L225 Difference]: With dead ends: 67891 [2022-11-03 02:50:21,543 INFO L226 Difference]: Without dead ends: 39697 [2022-11-03 02:50:21,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:50:21,582 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 441 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:50:21,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 452 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:50:21,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39697 states.