./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vlunc.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/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_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vlunc.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/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 64bit --witnessprinter.graph.data.programhash f6d5806dc2a069b52e5e35ee04f1ef92bf49979b38b271db0ee312abca8de37e --- 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 02:31:24,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:31:24,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:31:24,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:31:24,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:31:24,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:31:24,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:31:24,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:31:24,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:31:24,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:31:24,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:31:24,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:31:24,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:31:24,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:31:24,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:31:24,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:31:24,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:31:24,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:31:24,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:31:24,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:31:24,401 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:31:24,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:31:24,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:31:24,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:31:24,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:31:24,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:31:24,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:31:24,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:31:24,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:31:24,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:31:24,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:31:24,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:31:24,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:31:24,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:31:24,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:31:24,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:31:24,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:31:24,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:31:24,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:31:24,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:31:24,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:31:24,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:31:24,444 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:31:24,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:31:24,445 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:31:24,445 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:31:24,446 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:31:24,446 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:31:24,446 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:31:24,447 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:31:24,447 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:31:24,447 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:31:24,448 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:31:24,448 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:31:24,448 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:31:24,448 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:31:24,449 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:31:24,449 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:31:24,449 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:31:24,449 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:31:24,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:31:24,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:31:24,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:31:24,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:31:24,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:31:24,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:31:24,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:31:24,452 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:31:24,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:31:24,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:31:24,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:31:24,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:31:24,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:31:24,454 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:31:24,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:31:24,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:31:24,455 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:31:24,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:31:24,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:31:24,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:31:24,456 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_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6d5806dc2a069b52e5e35ee04f1ef92bf49979b38b271db0ee312abca8de37e [2022-11-03 02:31:24,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:31:24,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:31:24,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:31:24,772 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:31:24,772 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:31:24,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vlunc.c [2022-11-03 02:31:24,871 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/data/fff5731fb/881a9e07fd004ed281ba214b1a5abd48/FLAG5cb4f0146 [2022-11-03 02:31:25,345 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:31:25,346 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vlunc.c [2022-11-03 02:31:25,354 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/data/fff5731fb/881a9e07fd004ed281ba214b1a5abd48/FLAG5cb4f0146 [2022-11-03 02:31:25,697 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/data/fff5731fb/881a9e07fd004ed281ba214b1a5abd48 [2022-11-03 02:31:25,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:31:25,703 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:31:25,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:31:25,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:31:25,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:31:25,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:31:25" (1/1) ... [2022-11-03 02:31:25,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ef3704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:25, skipping insertion in model container [2022-11-03 02:31:25,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:31:25" (1/1) ... [2022-11-03 02:31:25,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:31:25,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:31:25,954 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_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vlunc.c[1107,1120] [2022-11-03 02:31:26,106 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:31:26,112 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:31:26,132 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_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vlunc.c[1107,1120] [2022-11-03 02:31:26,205 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:31:26,217 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:31:26,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:26 WrapperNode [2022-11-03 02:31:26,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:31:26,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:31:26,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:31:26,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:31:26,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:26" (1/1) ... [2022-11-03 02:31:26,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:26" (1/1) ... [2022-11-03 02:31:26,304 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 349 [2022-11-03 02:31:26,304 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:31:26,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:31:26,305 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:31:26,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:31:26,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:26" (1/1) ... [2022-11-03 02:31:26,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:26" (1/1) ... [2022-11-03 02:31:26,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:26" (1/1) ... [2022-11-03 02:31:26,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:26" (1/1) ... [2022-11-03 02:31:26,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:26" (1/1) ... [2022-11-03 02:31:26,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:26" (1/1) ... [2022-11-03 02:31:26,381 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:26" (1/1) ... [2022-11-03 02:31:26,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:26" (1/1) ... [2022-11-03 02:31:26,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:31:26,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:31:26,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:31:26,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:31:26,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:26" (1/1) ... [2022-11-03 02:31:26,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:31:26,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:26,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:31:26,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:31:26,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:31:26,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:31:26,647 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:31:26,649 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:31:27,287 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:31:27,747 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:31:27,747 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:31:27,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:31:27 BoogieIcfgContainer [2022-11-03 02:31:27,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:31:27,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:31:27,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:31:27,759 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:31:27,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:31:25" (1/3) ... [2022-11-03 02:31:27,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36250e02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:31:27, skipping insertion in model container [2022-11-03 02:31:27,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:26" (2/3) ... [2022-11-03 02:31:27,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36250e02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:31:27, skipping insertion in model container [2022-11-03 02:31:27,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:31:27" (3/3) ... [2022-11-03 02:31:27,763 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_QF_BV_vlunc.c [2022-11-03 02:31:27,786 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:31:27,787 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:31:27,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:31:27,874 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;@77b5e3b2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:31:27,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:31:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:27,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 02:31:27,889 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:27,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 02:31:27,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:27,899 INFO L85 PathProgramCache]: Analyzing trace with hash 6385302, now seen corresponding path program 1 times [2022-11-03 02:31:27,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:31:27,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74370349] [2022-11-03 02:31:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:27,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:31:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:31:28,387 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:31:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:31:28,691 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:31:28,696 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:31:28,698 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:31:28,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:31:28,705 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 02:31:28,710 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:31:28,739 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-03 02:31:28,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:31:28 BoogieIcfgContainer [2022-11-03 02:31:28,746 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:31:28,747 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:31:28,747 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:31:28,747 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:31:28,747 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:31:27" (3/4) ... [2022-11-03 02:31:28,750 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 02:31:28,750 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:31:28,752 INFO L158 Benchmark]: Toolchain (without parser) took 3048.14ms. Allocated memory was 134.2MB in the beginning and 201.3MB in the end (delta: 67.1MB). Free memory was 92.1MB in the beginning and 126.5MB in the end (delta: -34.5MB). Peak memory consumption was 29.7MB. Max. memory is 16.1GB. [2022-11-03 02:31:28,752 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 134.2MB. Free memory is still 109.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:31:28,753 INFO L158 Benchmark]: CACSL2BoogieTranslator took 513.18ms. Allocated memory is still 134.2MB. Free memory was 91.9MB in the beginning and 102.6MB in the end (delta: -10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:31:28,754 INFO L158 Benchmark]: Boogie Procedure Inliner took 85.49ms. Allocated memory is still 134.2MB. Free memory was 102.2MB in the beginning and 97.6MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:31:28,754 INFO L158 Benchmark]: Boogie Preprocessor took 91.72ms. Allocated memory is still 134.2MB. Free memory was 97.6MB in the beginning and 94.2MB in the end (delta: 3.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 02:31:28,755 INFO L158 Benchmark]: RCFGBuilder took 1350.93ms. Allocated memory was 134.2MB in the beginning and 201.3MB in the end (delta: 67.1MB). Free memory was 94.2MB in the beginning and 84.0MB in the end (delta: 10.2MB). Peak memory consumption was 84.0MB. Max. memory is 16.1GB. [2022-11-03 02:31:28,756 INFO L158 Benchmark]: TraceAbstraction took 991.34ms. Allocated memory is still 201.3MB. Free memory was 83.0MB in the beginning and 126.5MB in the end (delta: -43.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:31:28,756 INFO L158 Benchmark]: Witness Printer took 3.91ms. Allocated memory is still 201.3MB. Free memory is still 126.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:31:28,759 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 134.2MB. Free memory is still 109.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 513.18ms. Allocated memory is still 134.2MB. Free memory was 91.9MB in the beginning and 102.6MB in the end (delta: -10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 85.49ms. Allocated memory is still 134.2MB. Free memory was 102.2MB in the beginning and 97.6MB in the end (delta: 4.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 91.72ms. Allocated memory is still 134.2MB. Free memory was 97.6MB in the beginning and 94.2MB in the end (delta: 3.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1350.93ms. Allocated memory was 134.2MB in the beginning and 201.3MB in the end (delta: 67.1MB). Free memory was 94.2MB in the beginning and 84.0MB in the end (delta: 10.2MB). Peak memory consumption was 84.0MB. Max. memory is 16.1GB. * TraceAbstraction took 991.34ms. Allocated memory is still 201.3MB. Free memory was 83.0MB in the beginning and 126.5MB in the end (delta: -43.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.91ms. Allocated memory is still 201.3MB. Free memory is still 126.5MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 106, overapproximation of bitwiseOr at line 80, overapproximation of bitwiseAnd at line 68. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 1); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (1 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 8); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (8 - 1); [L31] const SORT_1 var_6 = 0; [L32] const SORT_1 var_16 = 1; [L33] const SORT_3 var_33 = 0; [L34] const SORT_3 var_36 = 27; [L35] const SORT_3 var_44 = 85; [L36] const SORT_3 var_47 = 67; [L37] const SORT_3 var_50 = 78; [L39] SORT_1 input_2; [L40] SORT_3 input_4; [L41] SORT_1 input_5; [L42] SORT_3 input_39; [L44] SORT_1 state_7 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L45] SORT_1 state_9 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L46] SORT_1 state_12 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L47] SORT_1 state_17 = __VERIFIER_nondet_uchar() & mask_SORT_1; [L48] SORT_3 state_34 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L49] SORT_3 state_42 = __VERIFIER_nondet_uchar() & mask_SORT_3; [L51] SORT_1 init_8_arg_1 = var_6; [L52] state_7 = init_8_arg_1 [L53] SORT_1 init_10_arg_1 = var_6; [L54] state_9 = init_10_arg_1 [L55] SORT_1 init_13_arg_1 = var_6; [L56] state_12 = init_13_arg_1 [L57] SORT_1 init_18_arg_1 = var_16; [L58] state_17 = init_18_arg_1 [L59] SORT_3 init_35_arg_1 = var_33; [L60] state_34 = init_35_arg_1 [L61] SORT_3 init_43_arg_1 = var_33; [L62] state_42 = init_43_arg_1 VAL [init_10_arg_1=0, init_13_arg_1=0, init_18_arg_1=1, init_35_arg_1=0, init_43_arg_1=0, init_8_arg_1=0, mask_SORT_1=1, mask_SORT_3=255, msb_SORT_1=1, msb_SORT_3=128, state_12=0, state_17=1, state_34=0, state_42=0, state_7=0, state_9=0, var_16=1, var_33=0, var_36=27, var_44=85, var_47=67, var_50=78, var_6=0] [L65] input_2 = __VERIFIER_nondet_uchar() [L66] input_4 = __VERIFIER_nondet_uchar() [L67] input_5 = __VERIFIER_nondet_uchar() [L68] input_5 = input_5 & mask_SORT_1 [L69] input_39 = __VERIFIER_nondet_uchar() [L72] SORT_1 var_11_arg_0 = state_7; [L73] SORT_1 var_11_arg_1 = state_9; [L74] SORT_1 var_11 = var_11_arg_0 & var_11_arg_1; [L75] SORT_1 var_14_arg_0 = state_7; [L76] SORT_1 var_14_arg_1 = state_12; [L77] SORT_1 var_14 = var_14_arg_0 & var_14_arg_1; [L78] SORT_1 var_15_arg_0 = var_11; [L79] SORT_1 var_15_arg_1 = var_14; [L80] SORT_1 var_15 = var_15_arg_0 | var_15_arg_1; [L81] SORT_1 var_19_arg_0 = state_7; [L82] SORT_1 var_19_arg_1 = state_17; [L83] SORT_1 var_19 = var_19_arg_0 & var_19_arg_1; [L84] SORT_1 var_20_arg_0 = var_15; [L85] SORT_1 var_20_arg_1 = var_19; [L86] SORT_1 var_20 = var_20_arg_0 | var_20_arg_1; [L87] SORT_1 var_21_arg_0 = state_9; [L88] SORT_1 var_21_arg_1 = state_12; [L89] SORT_1 var_21 = var_21_arg_0 & var_21_arg_1; [L90] SORT_1 var_22_arg_0 = var_20; [L91] SORT_1 var_22_arg_1 = var_21; [L92] SORT_1 var_22 = var_22_arg_0 | var_22_arg_1; [L93] SORT_1 var_23_arg_0 = state_9; [L94] SORT_1 var_23_arg_1 = state_17; [L95] SORT_1 var_23 = var_23_arg_0 & var_23_arg_1; [L96] SORT_1 var_24_arg_0 = var_22; [L97] SORT_1 var_24_arg_1 = var_23; [L98] SORT_1 var_24 = var_24_arg_0 | var_24_arg_1; [L99] SORT_1 var_25_arg_0 = state_12; [L100] SORT_1 var_25_arg_1 = state_17; [L101] SORT_1 var_25 = var_25_arg_0 & var_25_arg_1; [L102] SORT_1 var_26_arg_0 = var_24; [L103] SORT_1 var_26_arg_1 = var_25; [L104] SORT_1 var_26 = var_26_arg_0 | var_26_arg_1; [L105] SORT_1 var_27_arg_0 = var_26; [L106] SORT_1 var_27 = ~var_27_arg_0; [L107] SORT_1 var_30_arg_0 = var_27; [L108] SORT_1 var_30 = ~var_30_arg_0; [L109] SORT_1 var_31_arg_0 = var_16; [L110] SORT_1 var_31_arg_1 = var_30; [L111] SORT_1 var_31 = var_31_arg_0 & var_31_arg_1; [L112] var_31 = var_31 & mask_SORT_1 [L113] SORT_1 bad_32_arg_0 = var_31; [L114] CALL __VERIFIER_assert(!(bad_32_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-03 02:31:28,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/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_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vlunc.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/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 64bit --witnessprinter.graph.data.programhash f6d5806dc2a069b52e5e35ee04f1ef92bf49979b38b271db0ee312abca8de37e --- 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 02:31:31,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:31:31,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:31:31,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:31:31,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:31:31,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:31:31,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:31:31,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:31:31,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:31:31,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:31:31,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:31:31,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:31:31,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:31:31,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:31:31,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:31:31,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:31:31,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:31:31,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:31:31,328 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:31:31,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:31:31,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:31:31,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:31:31,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:31:31,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:31:31,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:31:31,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:31:31,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:31:31,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:31:31,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:31:31,343 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:31:31,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:31:31,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:31:31,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:31:31,347 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:31:31,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:31:31,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:31:31,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:31:31,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:31:31,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:31:31,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:31:31,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:31:31,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2022-11-03 02:31:31,397 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:31:31,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:31:31,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:31:31,401 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:31:31,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:31:31,403 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:31:31,403 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:31:31,403 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:31:31,404 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:31:31,404 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:31:31,405 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:31:31,405 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:31:31,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:31:31,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:31:31,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:31:31,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:31:31,408 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:31:31,408 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:31:31,409 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 02:31:31,409 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 02:31:31,409 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:31:31,409 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:31:31,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:31:31,410 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:31:31,410 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 02:31:31,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:31:31,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:31:31,411 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:31:31,411 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:31:31,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:31:31,412 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 02:31:31,412 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 02:31:31,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:31:31,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:31:31,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 02:31:31,414 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6d5806dc2a069b52e5e35ee04f1ef92bf49979b38b271db0ee312abca8de37e [2022-11-03 02:31:31,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:31:31,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:31:31,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:31:31,862 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:31:31,866 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:31:31,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vlunc.c [2022-11-03 02:31:31,942 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/data/b36590925/dc59b7a913c9405280a833e945ac3ec2/FLAGc6f197fc7 [2022-11-03 02:31:32,538 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:31:32,539 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vlunc.c [2022-11-03 02:31:32,548 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/data/b36590925/dc59b7a913c9405280a833e945ac3ec2/FLAGc6f197fc7 [2022-11-03 02:31:32,847 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/data/b36590925/dc59b7a913c9405280a833e945ac3ec2 [2022-11-03 02:31:32,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:31:32,855 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:31:32,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:31:32,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:31:32,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:31:32,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:31:32" (1/1) ... [2022-11-03 02:31:32,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3696338c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:32, skipping insertion in model container [2022-11-03 02:31:32,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:31:32" (1/1) ... [2022-11-03 02:31:32,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:31:32,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:31:33,115 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_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vlunc.c[1107,1120] [2022-11-03 02:31:33,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:31:33,311 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:31:33,328 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_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_vlunc.c[1107,1120] [2022-11-03 02:31:33,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:31:33,434 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:31:33,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:33 WrapperNode [2022-11-03 02:31:33,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:31:33,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:31:33,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:31:33,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:31:33,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:33" (1/1) ... [2022-11-03 02:31:33,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:33" (1/1) ... [2022-11-03 02:31:33,514 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 349 [2022-11-03 02:31:33,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:31:33,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:31:33,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:31:33,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:31:33,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:33" (1/1) ... [2022-11-03 02:31:33,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:33" (1/1) ... [2022-11-03 02:31:33,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:33" (1/1) ... [2022-11-03 02:31:33,550 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:33" (1/1) ... [2022-11-03 02:31:33,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:33" (1/1) ... [2022-11-03 02:31:33,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:33" (1/1) ... [2022-11-03 02:31:33,580 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:33" (1/1) ... [2022-11-03 02:31:33,582 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:33" (1/1) ... [2022-11-03 02:31:33,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:31:33,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:31:33,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:31:33,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:31:33,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:33" (1/1) ... [2022-11-03 02:31:33,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:31:33,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:31:33,640 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:31:33,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:31:33,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:31:33,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:31:33,845 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:31:33,847 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:31:34,476 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:31:34,484 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:31:34,484 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:31:34,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:31:34 BoogieIcfgContainer [2022-11-03 02:31:34,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:31:34,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:31:34,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:31:34,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:31:34,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:31:32" (1/3) ... [2022-11-03 02:31:34,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba20ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:31:34, skipping insertion in model container [2022-11-03 02:31:34,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:31:33" (2/3) ... [2022-11-03 02:31:34,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ba20ace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:31:34, skipping insertion in model container [2022-11-03 02:31:34,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:31:34" (3/3) ... [2022-11-03 02:31:34,502 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_QF_BV_vlunc.c [2022-11-03 02:31:34,521 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:31:34,521 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:31:34,592 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:31:34,605 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;@249f845e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:31:34,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:31:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 53 states have (on average 1.490566037735849) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:34,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:31:34,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:34,622 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:31:34,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:34,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:34,632 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-03 02:31:34,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:34,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204864070] [2022-11-03 02:31:34,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:34,649 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:34,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:34,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:34,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 02:31:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:34,830 WARN L261 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:31:34,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:35,153 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 02:31:35,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:35,154 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:35,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204864070] [2022-11-03 02:31:35,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204864070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:35,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:35,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:31:35,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322489913] [2022-11-03 02:31:35,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:35,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:31:35,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:35,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:31:35,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:31:35,201 INFO L87 Difference]: Start difference. First operand has 55 states, 53 states have (on average 1.490566037735849) internal successors, (79), 54 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:35,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:35,315 INFO L93 Difference]: Finished difference Result 152 states and 228 transitions. [2022-11-03 02:31:35,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:31:35,318 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:31:35,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:35,327 INFO L225 Difference]: With dead ends: 152 [2022-11-03 02:31:35,327 INFO L226 Difference]: Without dead ends: 99 [2022-11-03 02:31:35,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 02:31:35,334 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 136 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:35,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 198 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:35,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-03 02:31:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 53. [2022-11-03 02:31:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.4423076923076923) internal successors, (75), 52 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:35,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 75 transitions. [2022-11-03 02:31:35,393 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 75 transitions. Word has length 5 [2022-11-03 02:31:35,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:35,393 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 75 transitions. [2022-11-03 02:31:35,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:35,394 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 75 transitions. [2022-11-03 02:31:35,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:31:35,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:35,396 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] [2022-11-03 02:31:35,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:35,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:35,614 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:35,614 INFO L85 PathProgramCache]: Analyzing trace with hash -291608655, now seen corresponding path program 1 times [2022-11-03 02:31:35,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:35,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1687430622] [2022-11-03 02:31:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:35,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:35,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:35,619 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:35,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 02:31:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:35,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:31:35,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:35,890 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 02:31:35,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:35,891 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:35,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1687430622] [2022-11-03 02:31:35,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1687430622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:35,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:35,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:31:35,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150136888] [2022-11-03 02:31:35,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:35,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:31:35,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:35,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:31:35,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:31:35,895 INFO L87 Difference]: Start difference. First operand 53 states and 75 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:35,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:35,988 INFO L93 Difference]: Finished difference Result 195 states and 282 transitions. [2022-11-03 02:31:35,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:31:35,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:31:35,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:35,992 INFO L225 Difference]: With dead ends: 195 [2022-11-03 02:31:35,992 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 02:31:35,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 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 02:31:35,995 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 198 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:35,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 252 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:35,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 02:31:36,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 55. [2022-11-03 02:31:36,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.4259259259259258) internal successors, (77), 54 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:36,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 77 transitions. [2022-11-03 02:31:36,009 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 77 transitions. Word has length 52 [2022-11-03 02:31:36,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:36,010 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 77 transitions. [2022-11-03 02:31:36,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:36,014 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 77 transitions. [2022-11-03 02:31:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:31:36,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:36,016 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] [2022-11-03 02:31:36,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:36,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:36,219 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:36,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:36,219 INFO L85 PathProgramCache]: Analyzing trace with hash -644697037, now seen corresponding path program 1 times [2022-11-03 02:31:36,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:36,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129430233] [2022-11-03 02:31:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:36,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:36,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:36,222 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:36,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 02:31:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:36,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:31:36,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:36,496 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 02:31:36,497 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:36,497 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:36,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129430233] [2022-11-03 02:31:36,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129430233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:36,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:36,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:31:36,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199470833] [2022-11-03 02:31:36,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:36,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:31:36,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:36,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:31:36,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:31:36,500 INFO L87 Difference]: Start difference. First operand 55 states and 77 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:36,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:36,625 INFO L93 Difference]: Finished difference Result 200 states and 286 transitions. [2022-11-03 02:31:36,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:31:36,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:31:36,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:36,626 INFO L225 Difference]: With dead ends: 200 [2022-11-03 02:31:36,627 INFO L226 Difference]: Without dead ends: 151 [2022-11-03 02:31:36,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:31:36,628 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 261 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:36,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 377 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:36,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-03 02:31:36,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 59. [2022-11-03 02:31:36,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 58 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2022-11-03 02:31:36,636 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 52 [2022-11-03 02:31:36,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:36,637 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2022-11-03 02:31:36,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:36,637 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2022-11-03 02:31:36,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:31:36,638 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:36,639 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] [2022-11-03 02:31:36,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:36,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:36,852 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:36,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1542090315, now seen corresponding path program 1 times [2022-11-03 02:31:36,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:36,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166235693] [2022-11-03 02:31:36,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:36,854 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:36,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:36,856 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:36,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 02:31:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:37,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:31:37,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:37,126 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 02:31:37,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:37,127 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:37,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166235693] [2022-11-03 02:31:37,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [166235693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:37,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:37,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:31:37,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577715797] [2022-11-03 02:31:37,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:37,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:31:37,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:37,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:31:37,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:31:37,134 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:37,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:37,207 INFO L93 Difference]: Finished difference Result 200 states and 285 transitions. [2022-11-03 02:31:37,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:31:37,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:31:37,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:37,210 INFO L225 Difference]: With dead ends: 200 [2022-11-03 02:31:37,210 INFO L226 Difference]: Without dead ends: 151 [2022-11-03 02:31:37,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:31:37,219 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 254 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:37,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 392 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:31:37,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-03 02:31:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 61. [2022-11-03 02:31:37,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.4) internal successors, (84), 60 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2022-11-03 02:31:37,232 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 52 [2022-11-03 02:31:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:37,232 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2022-11-03 02:31:37,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2022-11-03 02:31:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:31:37,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:37,234 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] [2022-11-03 02:31:37,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-03 02:31:37,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:37,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:37,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:37,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1118443593, now seen corresponding path program 1 times [2022-11-03 02:31:37,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:37,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036879739] [2022-11-03 02:31:37,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:37,436 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:37,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:37,437 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:37,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-03 02:31:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:37,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:31:37,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:37,717 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 02:31:37,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:37,718 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:37,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036879739] [2022-11-03 02:31:37,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036879739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:37,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:37,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:31:37,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084184479] [2022-11-03 02:31:37,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:37,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:31:37,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:37,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:31:37,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:31:37,720 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:37,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:37,793 INFO L93 Difference]: Finished difference Result 195 states and 279 transitions. [2022-11-03 02:31:37,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:31:37,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:31:37,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:37,794 INFO L225 Difference]: With dead ends: 195 [2022-11-03 02:31:37,795 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 02:31:37,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 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 02:31:37,796 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 170 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:37,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 249 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:37,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 02:31:37,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 65. [2022-11-03 02:31:37,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.390625) internal successors, (89), 64 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2022-11-03 02:31:37,803 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 52 [2022-11-03 02:31:37,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:37,803 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2022-11-03 02:31:37,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2022-11-03 02:31:37,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:31:37,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:37,805 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] [2022-11-03 02:31:37,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:38,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:38,018 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:38,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:38,019 INFO L85 PathProgramCache]: Analyzing trace with hash -458912071, now seen corresponding path program 1 times [2022-11-03 02:31:38,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:38,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210100338] [2022-11-03 02:31:38,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:38,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:38,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:38,021 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:38,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-03 02:31:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:38,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:31:38,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:38,295 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 02:31:38,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:38,296 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:38,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210100338] [2022-11-03 02:31:38,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210100338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:38,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:38,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:31:38,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817111169] [2022-11-03 02:31:38,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:38,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:31:38,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:38,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:31:38,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:31:38,298 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:38,371 INFO L93 Difference]: Finished difference Result 195 states and 278 transitions. [2022-11-03 02:31:38,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:31:38,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:31:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:38,372 INFO L225 Difference]: With dead ends: 195 [2022-11-03 02:31:38,372 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 02:31:38,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 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 02:31:38,374 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 164 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:38,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 248 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:38,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 02:31:38,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 67. [2022-11-03 02:31:38,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.378787878787879) internal successors, (91), 66 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:38,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2022-11-03 02:31:38,379 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 52 [2022-11-03 02:31:38,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:38,380 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2022-11-03 02:31:38,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2022-11-03 02:31:38,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:31:38,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:38,381 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] [2022-11-03 02:31:38,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:38,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:38,594 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:38,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:38,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1302917573, now seen corresponding path program 1 times [2022-11-03 02:31:38,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:38,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [10215504] [2022-11-03 02:31:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:38,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:38,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:38,597 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:38,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 02:31:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:38,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:31:38,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:38,953 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 02:31:38,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:38,953 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:38,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [10215504] [2022-11-03 02:31:38,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [10215504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:38,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:38,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:31:38,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420808745] [2022-11-03 02:31:38,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:38,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:31:38,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:38,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:31:38,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:31:38,956 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:39,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:39,080 INFO L93 Difference]: Finished difference Result 210 states and 297 transitions. [2022-11-03 02:31:39,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:31:39,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:31:39,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:39,082 INFO L225 Difference]: With dead ends: 210 [2022-11-03 02:31:39,082 INFO L226 Difference]: Without dead ends: 161 [2022-11-03 02:31:39,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:31:39,083 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 246 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:39,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 371 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:39,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-03 02:31:39,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 69. [2022-11-03 02:31:39,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.3676470588235294) internal successors, (93), 68 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:39,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2022-11-03 02:31:39,097 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 52 [2022-11-03 02:31:39,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:39,097 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2022-11-03 02:31:39,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:39,098 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2022-11-03 02:31:39,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:31:39,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:39,099 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] [2022-11-03 02:31:39,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:39,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:39,300 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:39,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:39,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1375304131, now seen corresponding path program 1 times [2022-11-03 02:31:39,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:39,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684373057] [2022-11-03 02:31:39,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:39,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:39,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:39,302 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:39,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 02:31:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:39,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:31:39,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:39,592 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 02:31:39,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:39,592 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:39,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684373057] [2022-11-03 02:31:39,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684373057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:39,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:39,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:31:39,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243404395] [2022-11-03 02:31:39,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:39,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:31:39,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:39,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:31:39,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:31:39,594 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:39,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:39,669 INFO L93 Difference]: Finished difference Result 195 states and 276 transitions. [2022-11-03 02:31:39,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:31:39,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:31:39,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:39,670 INFO L225 Difference]: With dead ends: 195 [2022-11-03 02:31:39,671 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 02:31:39,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 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 02:31:39,672 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 142 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:39,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 246 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:39,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 02:31:39,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 75. [2022-11-03 02:31:39,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.364864864864865) internal successors, (101), 74 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:39,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2022-11-03 02:31:39,683 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 52 [2022-11-03 02:31:39,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:39,684 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2022-11-03 02:31:39,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:39,684 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2022-11-03 02:31:39,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:31:39,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:39,686 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] [2022-11-03 02:31:39,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:39,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:39,912 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:39,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:39,913 INFO L85 PathProgramCache]: Analyzing trace with hash 547923903, now seen corresponding path program 1 times [2022-11-03 02:31:39,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:39,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2067741801] [2022-11-03 02:31:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:39,914 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:39,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:39,915 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:39,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-03 02:31:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:40,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:31:40,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:40,201 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 02:31:40,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:40,202 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:40,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2067741801] [2022-11-03 02:31:40,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2067741801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:40,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:40,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:31:40,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688417988] [2022-11-03 02:31:40,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:40,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:31:40,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:40,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:31:40,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:31:40,204 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:40,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:40,268 INFO L93 Difference]: Finished difference Result 195 states and 275 transitions. [2022-11-03 02:31:40,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:31:40,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:31:40,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:40,269 INFO L225 Difference]: With dead ends: 195 [2022-11-03 02:31:40,269 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 02:31:40,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 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 02:31:40,270 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 136 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:40,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 245 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:31:40,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 02:31:40,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 77. [2022-11-03 02:31:40,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.355263157894737) internal successors, (103), 76 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:40,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 103 transitions. [2022-11-03 02:31:40,275 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 103 transitions. Word has length 52 [2022-11-03 02:31:40,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:40,275 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 103 transitions. [2022-11-03 02:31:40,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:40,275 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 103 transitions. [2022-11-03 02:31:40,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:31:40,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:40,276 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] [2022-11-03 02:31:40,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:40,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:40,495 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:40,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:40,495 INFO L85 PathProgramCache]: Analyzing trace with hash 688472513, now seen corresponding path program 1 times [2022-11-03 02:31:40,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:40,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607407291] [2022-11-03 02:31:40,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:40,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:40,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:40,497 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:40,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-03 02:31:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:40,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:31:40,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:40,913 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 02:31:40,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:40,914 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:40,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607407291] [2022-11-03 02:31:40,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607407291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:40,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:40,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:31:40,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068321257] [2022-11-03 02:31:40,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:40,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:31:40,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:40,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:31:40,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:31:40,920 INFO L87 Difference]: Start difference. First operand 77 states and 103 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:41,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:41,038 INFO L93 Difference]: Finished difference Result 220 states and 309 transitions. [2022-11-03 02:31:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:31:41,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:31:41,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:41,040 INFO L225 Difference]: With dead ends: 220 [2022-11-03 02:31:41,040 INFO L226 Difference]: Without dead ends: 171 [2022-11-03 02:31:41,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:31:41,041 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 233 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:41,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 366 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:41,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-03 02:31:41,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 79. [2022-11-03 02:31:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.3461538461538463) internal successors, (105), 78 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:41,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2022-11-03 02:31:41,045 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 52 [2022-11-03 02:31:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:41,045 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2022-11-03 02:31:41,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2022-11-03 02:31:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:31:41,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:41,049 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] [2022-11-03 02:31:41,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:41,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:41,263 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:41,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:41,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1116965821, now seen corresponding path program 1 times [2022-11-03 02:31:41,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:41,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574526101] [2022-11-03 02:31:41,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:41,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:41,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:41,265 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:41,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 02:31:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:41,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:31:41,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:41,514 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 02:31:41,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:41,515 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:41,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574526101] [2022-11-03 02:31:41,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574526101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:41,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:41,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:31:41,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161361141] [2022-11-03 02:31:41,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:41,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:31:41,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:41,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:31:41,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:31:41,517 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:41,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:41,576 INFO L93 Difference]: Finished difference Result 200 states and 278 transitions. [2022-11-03 02:31:41,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:31:41,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:31:41,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:41,577 INFO L225 Difference]: With dead ends: 200 [2022-11-03 02:31:41,578 INFO L226 Difference]: Without dead ends: 151 [2022-11-03 02:31:41,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:31:41,579 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 190 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:41,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 355 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:31:41,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-03 02:31:41,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 81. [2022-11-03 02:31:41,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3375) internal successors, (107), 80 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:41,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2022-11-03 02:31:41,583 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 52 [2022-11-03 02:31:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:41,583 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2022-11-03 02:31:41,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2022-11-03 02:31:41,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:31:41,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:41,584 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] [2022-11-03 02:31:41,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:41,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:41,797 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:41,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:41,798 INFO L85 PathProgramCache]: Analyzing trace with hash -694263995, now seen corresponding path program 1 times [2022-11-03 02:31:41,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:41,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116133121] [2022-11-03 02:31:41,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:41,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:41,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:41,800 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:41,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-03 02:31:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:41,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:31:41,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:42,104 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 02:31:42,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:42,105 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:42,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116133121] [2022-11-03 02:31:42,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116133121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:42,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:42,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:31:42,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516816332] [2022-11-03 02:31:42,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:42,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:31:42,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:42,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:31:42,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:31:42,107 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:42,181 INFO L93 Difference]: Finished difference Result 195 states and 272 transitions. [2022-11-03 02:31:42,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:31:42,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:31:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:42,183 INFO L225 Difference]: With dead ends: 195 [2022-11-03 02:31:42,183 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 02:31:42,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 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 02:31:42,184 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 113 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:42,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 242 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:31:42,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 02:31:42,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 85. [2022-11-03 02:31:42,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.3333333333333333) internal successors, (112), 84 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:42,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 112 transitions. [2022-11-03 02:31:42,189 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 112 transitions. Word has length 52 [2022-11-03 02:31:42,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:42,190 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 112 transitions. [2022-11-03 02:31:42,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:42,190 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 112 transitions. [2022-11-03 02:31:42,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:31:42,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:42,196 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] [2022-11-03 02:31:42,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:42,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:42,408 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:42,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:42,409 INFO L85 PathProgramCache]: Analyzing trace with hash 2012355399, now seen corresponding path program 1 times [2022-11-03 02:31:42,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:42,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1973849285] [2022-11-03 02:31:42,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:42,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:42,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:42,410 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:42,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-03 02:31:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:42,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:31:42,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:42,705 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 02:31:42,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:42,705 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:42,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1973849285] [2022-11-03 02:31:42,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1973849285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:42,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:42,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:31:42,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081335386] [2022-11-03 02:31:42,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:42,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:31:42,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:42,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:31:42,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:31:42,708 INFO L87 Difference]: Start difference. First operand 85 states and 112 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:42,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:42,764 INFO L93 Difference]: Finished difference Result 195 states and 271 transitions. [2022-11-03 02:31:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:31:42,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:31:42,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:42,766 INFO L225 Difference]: With dead ends: 195 [2022-11-03 02:31:42,766 INFO L226 Difference]: Without dead ends: 146 [2022-11-03 02:31:42,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 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 02:31:42,768 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 107 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:42,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 241 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:31:42,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-03 02:31:42,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 87. [2022-11-03 02:31:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.3255813953488371) internal successors, (114), 86 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 114 transitions. [2022-11-03 02:31:42,772 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 114 transitions. Word has length 52 [2022-11-03 02:31:42,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:42,773 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 114 transitions. [2022-11-03 02:31:42,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:42,774 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 114 transitions. [2022-11-03 02:31:42,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:31:42,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:42,779 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] [2022-11-03 02:31:42,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:42,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:42,992 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:42,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:42,992 INFO L85 PathProgramCache]: Analyzing trace with hash 732491721, now seen corresponding path program 1 times [2022-11-03 02:31:42,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:42,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958791609] [2022-11-03 02:31:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:42,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:42,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:42,994 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:42,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 02:31:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:43,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:31:43,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:43,232 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 02:31:43,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:31:43,232 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:31:43,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958791609] [2022-11-03 02:31:43,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958791609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:31:43,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:31:43,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:31:43,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052606495] [2022-11-03 02:31:43,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:31:43,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:31:43,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:31:43,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:31:43,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:31:43,235 INFO L87 Difference]: Start difference. First operand 87 states and 114 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:43,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:31:43,292 INFO L93 Difference]: Finished difference Result 200 states and 275 transitions. [2022-11-03 02:31:43,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:31:43,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:31:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:31:43,293 INFO L225 Difference]: With dead ends: 200 [2022-11-03 02:31:43,293 INFO L226 Difference]: Without dead ends: 151 [2022-11-03 02:31:43,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:31:43,294 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 159 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:31:43,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 337 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:31:43,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-03 02:31:43,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 91. [2022-11-03 02:31:43,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.3222222222222222) internal successors, (119), 90 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2022-11-03 02:31:43,299 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 52 [2022-11-03 02:31:43,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:31:43,299 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2022-11-03 02:31:43,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:31:43,299 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2022-11-03 02:31:43,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:31:43,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:31:43,300 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] [2022-11-03 02:31:43,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 02:31:43,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:31:43,513 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:31:43,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:31:43,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1433556299, now seen corresponding path program 1 times [2022-11-03 02:31:43,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:31:43,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992225907] [2022-11-03 02:31:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:31:43,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:31:43,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:31:43,515 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:31:43,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-03 02:31:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:31:43,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:31:43,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:31:44,270 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 02:31:44,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:44,321 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 02:33:44,321 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:33:44,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992225907] [2022-11-03 02:33:44,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992225907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:44,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [120641385] [2022-11-03 02:33:44,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:44,322 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:33:44,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:33:44,326 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:33:44,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-03 02:33:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:44,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:33:44,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:44,970 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 02:33:44,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:45,546 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 02:33:45,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [120641385] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:45,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515076070] [2022-11-03 02:33:45,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:33:45,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:33:45,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:33:45,554 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:33:45,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 02:33:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:33:45,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-03 02:33:45,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:33:46,126 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 02:33:46,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:33:58,787 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 02:33:58,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515076070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:33:58,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:33:58,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 15, 15] total 28 [2022-11-03 02:33:58,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329376814] [2022-11-03 02:33:58,788 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:33:58,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 02:33:58,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:33:58,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 02:33:58,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=598, Unknown=64, NotChecked=0, Total=756 [2022-11-03 02:33:58,790 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 28 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:01,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:01,574 INFO L93 Difference]: Finished difference Result 479 states and 661 transitions. [2022-11-03 02:34:01,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-03 02:34:01,575 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 28 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:34:01,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:01,578 INFO L225 Difference]: With dead ends: 479 [2022-11-03 02:34:01,578 INFO L226 Difference]: Without dead ends: 477 [2022-11-03 02:34:01,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 278 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 134.1s TimeCoverageRelationStatistics Valid=899, Invalid=2697, Unknown=64, NotChecked=0, Total=3660 [2022-11-03 02:34:01,580 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 1401 mSDsluCounter, 2378 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 2528 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 579 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:01,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1401 Valid, 2528 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 442 Invalid, 0 Unknown, 579 Unchecked, 0.5s Time] [2022-11-03 02:34:01,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-11-03 02:34:01,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 276. [2022-11-03 02:34:01,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.36) internal successors, (374), 275 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 374 transitions. [2022-11-03 02:34:01,592 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 374 transitions. Word has length 52 [2022-11-03 02:34:01,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:01,592 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 374 transitions. [2022-11-03 02:34:01,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 28 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:01,593 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 374 transitions. [2022-11-03 02:34:01,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:34:01,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:01,593 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] [2022-11-03 02:34:01,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:01,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:02,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:02,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:34:02,207 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:02,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:02,208 INFO L85 PathProgramCache]: Analyzing trace with hash -255387443, now seen corresponding path program 1 times [2022-11-03 02:34:02,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:02,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112066043] [2022-11-03 02:34:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:02,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:02,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:02,211 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:02,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-03 02:34:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:02,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:34:02,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:02,534 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 02:34:02,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:02,535 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:02,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112066043] [2022-11-03 02:34:02,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112066043] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:02,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:02,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:34:02,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062127821] [2022-11-03 02:34:02,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:02,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:34:02,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:02,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:34:02,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:34:02,539 INFO L87 Difference]: Start difference. First operand 276 states and 374 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:02,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:02,589 INFO L93 Difference]: Finished difference Result 464 states and 648 transitions. [2022-11-03 02:34:02,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:34:02,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:34:02,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:02,591 INFO L225 Difference]: With dead ends: 464 [2022-11-03 02:34:02,592 INFO L226 Difference]: Without dead ends: 268 [2022-11-03 02:34:02,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:34:02,593 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 22 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:02,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 372 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2022-11-03 02:34:02,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-03 02:34:02,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2022-11-03 02:34:02,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.3595505617977528) internal successors, (363), 267 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:02,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 363 transitions. [2022-11-03 02:34:02,601 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 363 transitions. Word has length 52 [2022-11-03 02:34:02,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:02,602 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 363 transitions. [2022-11-03 02:34:02,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 363 transitions. [2022-11-03 02:34:02,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:34:02,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:02,603 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] [2022-11-03 02:34:02,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:02,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:02,816 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:02,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:02,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1475207603, now seen corresponding path program 1 times [2022-11-03 02:34:02,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:02,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896403591] [2022-11-03 02:34:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:02,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:02,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:02,818 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:02,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-03 02:34:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:02,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:34:02,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:03,083 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 02:34:03,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:03,084 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:03,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896403591] [2022-11-03 02:34:03,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896403591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:03,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:03,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:34:03,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000472223] [2022-11-03 02:34:03,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:03,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:34:03,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:03,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:34:03,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:34:03,086 INFO L87 Difference]: Start difference. First operand 268 states and 363 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:03,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:03,119 INFO L93 Difference]: Finished difference Result 317 states and 434 transitions. [2022-11-03 02:34:03,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:34:03,120 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:34:03,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:03,121 INFO L225 Difference]: With dead ends: 317 [2022-11-03 02:34:03,121 INFO L226 Difference]: Without dead ends: 250 [2022-11-03 02:34:03,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:34:03,122 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 12 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:03,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 375 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2022-11-03 02:34:03,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-03 02:34:03,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-11-03 02:34:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.3775100401606426) internal successors, (343), 249 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:03,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 343 transitions. [2022-11-03 02:34:03,130 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 343 transitions. Word has length 52 [2022-11-03 02:34:03,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:03,130 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 343 transitions. [2022-11-03 02:34:03,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:03,131 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 343 transitions. [2022-11-03 02:34:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:34:03,131 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:03,131 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] [2022-11-03 02:34:03,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:03,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:03,344 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:03,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:03,345 INFO L85 PathProgramCache]: Analyzing trace with hash -411810867, now seen corresponding path program 1 times [2022-11-03 02:34:03,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:03,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550367417] [2022-11-03 02:34:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:03,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:03,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:03,346 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:03,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-03 02:34:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:03,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:34:03,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:03,585 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 02:34:03,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:03,586 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:03,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550367417] [2022-11-03 02:34:03,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550367417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:03,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:03,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:34:03,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535401041] [2022-11-03 02:34:03,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:03,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:34:03,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:03,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:34:03,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:34:03,588 INFO L87 Difference]: Start difference. First operand 250 states and 343 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:03,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:03,649 INFO L93 Difference]: Finished difference Result 524 states and 737 transitions. [2022-11-03 02:34:03,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:34:03,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:34:03,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:03,651 INFO L225 Difference]: With dead ends: 524 [2022-11-03 02:34:03,651 INFO L226 Difference]: Without dead ends: 326 [2022-11-03 02:34:03,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:34:03,652 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 84 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:03,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 421 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2022-11-03 02:34:03,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-11-03 02:34:03,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 250. [2022-11-03 02:34:03,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.3734939759036144) internal successors, (342), 249 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:03,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 342 transitions. [2022-11-03 02:34:03,661 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 342 transitions. Word has length 52 [2022-11-03 02:34:03,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:03,661 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 342 transitions. [2022-11-03 02:34:03,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:03,661 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 342 transitions. [2022-11-03 02:34:03,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:34:03,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:03,662 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] [2022-11-03 02:34:03,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:03,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:03,875 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:03,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:03,876 INFO L85 PathProgramCache]: Analyzing trace with hash 974392527, now seen corresponding path program 1 times [2022-11-03 02:34:03,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:03,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578684372] [2022-11-03 02:34:03,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:03,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:03,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:03,878 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:03,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-03 02:34:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:04,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:34:04,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:04,127 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 02:34:04,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:04,127 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:04,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578684372] [2022-11-03 02:34:04,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578684372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:04,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:04,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:34:04,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609769123] [2022-11-03 02:34:04,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:04,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:34:04,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:04,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:34:04,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:34:04,129 INFO L87 Difference]: Start difference. First operand 250 states and 342 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:04,180 INFO L93 Difference]: Finished difference Result 494 states and 695 transitions. [2022-11-03 02:34:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:34:04,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:34:04,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:04,182 INFO L225 Difference]: With dead ends: 494 [2022-11-03 02:34:04,182 INFO L226 Difference]: Without dead ends: 306 [2022-11-03 02:34:04,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:34:04,184 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 49 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:04,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 407 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-11-03 02:34:04,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-11-03 02:34:04,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 250. [2022-11-03 02:34:04,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.3694779116465863) internal successors, (341), 249 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 341 transitions. [2022-11-03 02:34:04,192 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 341 transitions. Word has length 52 [2022-11-03 02:34:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:04,193 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 341 transitions. [2022-11-03 02:34:04,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:04,193 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 341 transitions. [2022-11-03 02:34:04,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:34:04,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:04,194 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] [2022-11-03 02:34:04,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:04,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:04,406 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:04,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:04,406 INFO L85 PathProgramCache]: Analyzing trace with hash -714551215, now seen corresponding path program 1 times [2022-11-03 02:34:04,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:04,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1397081145] [2022-11-03 02:34:04,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:04,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:04,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:04,409 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:04,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-03 02:34:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:04,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:34:04,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:04,667 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 02:34:04,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:04,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:04,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1397081145] [2022-11-03 02:34:04,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1397081145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:04,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:04,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:34:04,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556855058] [2022-11-03 02:34:04,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:04,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:34:04,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:04,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:34:04,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:34:04,669 INFO L87 Difference]: Start difference. First operand 250 states and 341 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:04,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:04,743 INFO L93 Difference]: Finished difference Result 471 states and 660 transitions. [2022-11-03 02:34:04,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:34:04,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:34:04,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:04,745 INFO L225 Difference]: With dead ends: 471 [2022-11-03 02:34:04,745 INFO L226 Difference]: Without dead ends: 291 [2022-11-03 02:34:04,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:34:04,746 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 64 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:04,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 418 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2022-11-03 02:34:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-03 02:34:04,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 252. [2022-11-03 02:34:04,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.3665338645418326) internal successors, (343), 251 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:04,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 343 transitions. [2022-11-03 02:34:04,755 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 343 transitions. Word has length 52 [2022-11-03 02:34:04,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:04,756 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 343 transitions. [2022-11-03 02:34:04,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:04,756 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 343 transitions. [2022-11-03 02:34:04,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:34:04,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:04,757 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] [2022-11-03 02:34:04,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:04,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:04,969 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:04,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:04,970 INFO L85 PathProgramCache]: Analyzing trace with hash -34492845, now seen corresponding path program 1 times [2022-11-03 02:34:04,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:04,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [258633578] [2022-11-03 02:34:04,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:04,970 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:04,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:04,971 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:04,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-03 02:34:05,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:05,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:34:05,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:05,224 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 02:34:05,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:05,225 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:05,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [258633578] [2022-11-03 02:34:05,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [258633578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:05,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:05,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:34:05,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473603221] [2022-11-03 02:34:05,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:05,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:34:05,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:05,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:34:05,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:34:05,227 INFO L87 Difference]: Start difference. First operand 252 states and 343 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:05,305 INFO L93 Difference]: Finished difference Result 463 states and 647 transitions. [2022-11-03 02:34:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:34:05,306 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:34:05,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:05,308 INFO L225 Difference]: With dead ends: 463 [2022-11-03 02:34:05,308 INFO L226 Difference]: Without dead ends: 283 [2022-11-03 02:34:05,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:34:05,309 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 49 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:05,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 465 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-11-03 02:34:05,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-03 02:34:05,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 254. [2022-11-03 02:34:05,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.3636363636363635) internal successors, (345), 253 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 345 transitions. [2022-11-03 02:34:05,325 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 345 transitions. Word has length 52 [2022-11-03 02:34:05,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:05,325 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 345 transitions. [2022-11-03 02:34:05,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:05,326 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 345 transitions. [2022-11-03 02:34:05,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:34:05,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:05,327 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] [2022-11-03 02:34:05,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:05,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:05,539 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:05,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:05,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1740514517, now seen corresponding path program 1 times [2022-11-03 02:34:05,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:05,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618574213] [2022-11-03 02:34:05,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:05,541 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:05,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:05,542 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:05,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-03 02:34:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:05,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 02:34:05,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:05,817 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 02:34:05,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:34:05,817 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:34:05,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618574213] [2022-11-03 02:34:05,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618574213] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:34:05,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:34:05,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:34:05,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585862331] [2022-11-03 02:34:05,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:34:05,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:34:05,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:34:05,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:34:05,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:34:05,820 INFO L87 Difference]: Start difference. First operand 254 states and 345 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:05,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:34:05,907 INFO L93 Difference]: Finished difference Result 455 states and 634 transitions. [2022-11-03 02:34:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:34:05,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:34:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:34:05,912 INFO L225 Difference]: With dead ends: 455 [2022-11-03 02:34:05,912 INFO L226 Difference]: Without dead ends: 275 [2022-11-03 02:34:05,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:34:05,914 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 50 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:34:05,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 451 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-11-03 02:34:05,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-03 02:34:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 256. [2022-11-03 02:34:05,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.3607843137254902) internal successors, (347), 255 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 347 transitions. [2022-11-03 02:34:05,925 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 347 transitions. Word has length 52 [2022-11-03 02:34:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:34:05,925 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 347 transitions. [2022-11-03 02:34:05,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:34:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 347 transitions. [2022-11-03 02:34:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:34:05,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:34:05,926 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] [2022-11-03 02:34:05,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:34:06,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:34:06,139 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:34:06,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:34:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1742361559, now seen corresponding path program 1 times [2022-11-03 02:34:06,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:34:06,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489936828] [2022-11-03 02:34:06,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:34:06,141 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:34:06,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:34:06,142 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:34:06,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-03 02:34:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:34:06,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-03 02:34:06,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:34:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:34:07,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:05,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:38:05,714 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:05,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489936828] [2022-11-03 02:38:05,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489936828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:05,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1176515537] [2022-11-03 02:38:05,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:05,714 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:05,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:05,716 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:05,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-03 02:38:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:05,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-03 02:38:05,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:38:06,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:38:07,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1176515537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:07,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740398302] [2022-11-03 02:38:07,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:07,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:07,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:38:07,033 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:38:07,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-03 02:38:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:07,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-03 02:38:07,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:38:07,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:38:08,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740398302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:08,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 02:38:08,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 20, 20] total 38 [2022-11-03 02:38:08,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612021024] [2022-11-03 02:38:08,562 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 02:38:08,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 02:38:08,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:08,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 02:38:08,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1195, Unknown=116, NotChecked=0, Total=1406 [2022-11-03 02:38:08,564 INFO L87 Difference]: Start difference. First operand 256 states and 347 transitions. Second operand has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:11,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:11,607 INFO L93 Difference]: Finished difference Result 638 states and 892 transitions. [2022-11-03 02:38:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 02:38:11,608 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:38:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:11,611 INFO L225 Difference]: With dead ends: 638 [2022-11-03 02:38:11,611 INFO L226 Difference]: Without dead ends: 636 [2022-11-03 02:38:11,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 265 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 241.7s TimeCoverageRelationStatistics Valid=797, Invalid=3377, Unknown=116, NotChecked=0, Total=4290 [2022-11-03 02:38:11,613 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 1200 mSDsluCounter, 3892 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 4065 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 596 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:11,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 4065 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 354 Invalid, 0 Unknown, 596 Unchecked, 0.5s Time] [2022-11-03 02:38:11,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-11-03 02:38:11,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 329. [2022-11-03 02:38:11,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.350609756097561) internal successors, (443), 328 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 443 transitions. [2022-11-03 02:38:11,626 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 443 transitions. Word has length 52 [2022-11-03 02:38:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:11,626 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 443 transitions. [2022-11-03 02:38:11,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.789473684210526) internal successors, (106), 38 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:11,627 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 443 transitions. [2022-11-03 02:38:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-03 02:38:11,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:11,628 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] [2022-11-03 02:38:11,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:11,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:12,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:12,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:38:12,237 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:12,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:12,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1040761685, now seen corresponding path program 1 times [2022-11-03 02:38:12,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:12,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721303800] [2022-11-03 02:38:12,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:12,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:12,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:12,239 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:12,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-03 02:38:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:12,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 02:38:12,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:12,430 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 02:38:12,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:38:12,431 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:12,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721303800] [2022-11-03 02:38:12,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721303800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:12,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:38:12,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:38:12,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904285899] [2022-11-03 02:38:12,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:12,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:38:12,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:12,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:38:12,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:38:12,433 INFO L87 Difference]: Start difference. First operand 329 states and 443 transitions. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:12,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:12,499 INFO L93 Difference]: Finished difference Result 719 states and 1003 transitions. [2022-11-03 02:38:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:38:12,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-11-03 02:38:12,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:12,502 INFO L225 Difference]: With dead ends: 719 [2022-11-03 02:38:12,502 INFO L226 Difference]: Without dead ends: 493 [2022-11-03 02:38:12,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:38:12,503 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 196 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:12,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 294 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:38:12,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-11-03 02:38:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 303. [2022-11-03 02:38:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.3708609271523178) internal successors, (414), 302 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:12,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 414 transitions. [2022-11-03 02:38:12,517 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 414 transitions. Word has length 52 [2022-11-03 02:38:12,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:12,517 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 414 transitions. [2022-11-03 02:38:12,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:12,518 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 414 transitions. [2022-11-03 02:38:12,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 02:38:12,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:12,519 INFO L195 NwaCegarLoop]: trace histogram [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, 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 02:38:12,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:12,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:12,733 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:12,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:12,734 INFO L85 PathProgramCache]: Analyzing trace with hash -24122831, now seen corresponding path program 1 times [2022-11-03 02:38:12,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:12,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490758836] [2022-11-03 02:38:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:12,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:12,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:12,736 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:12,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-03 02:38:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:12,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:38:12,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:13,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:13,386 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:13,386 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:13,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490758836] [2022-11-03 02:38:13,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490758836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:13,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2061423194] [2022-11-03 02:38:13,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:13,387 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:13,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:13,391 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:13,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-03 02:38:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:13,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:38:13,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 02:38:13,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:38:13,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2061423194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:13,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:38:13,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 14 [2022-11-03 02:38:13,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423049978] [2022-11-03 02:38:13,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:13,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:38:13,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:13,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:38:13,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:38:13,808 INFO L87 Difference]: Start difference. First operand 303 states and 414 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:13,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:13,934 INFO L93 Difference]: Finished difference Result 852 states and 1217 transitions. [2022-11-03 02:38:13,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:38:13,935 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-11-03 02:38:13,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:13,937 INFO L225 Difference]: With dead ends: 852 [2022-11-03 02:38:13,938 INFO L226 Difference]: Without dead ends: 672 [2022-11-03 02:38:13,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:38:13,939 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 250 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:13,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 359 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:38:13,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-11-03 02:38:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 341. [2022-11-03 02:38:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.3735294117647059) internal successors, (467), 340 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:13,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 467 transitions. [2022-11-03 02:38:13,955 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 467 transitions. Word has length 99 [2022-11-03 02:38:13,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:13,955 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 467 transitions. [2022-11-03 02:38:13,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:13,956 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 467 transitions. [2022-11-03 02:38:13,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 02:38:13,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:13,957 INFO L195 NwaCegarLoop]: trace histogram [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, 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 02:38:13,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:14,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:14,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:14,361 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:14,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:14,362 INFO L85 PathProgramCache]: Analyzing trace with hash -725722705, now seen corresponding path program 1 times [2022-11-03 02:38:14,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:14,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468737602] [2022-11-03 02:38:14,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:14,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:14,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:14,364 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:14,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-03 02:38:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:14,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:38:14,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:14,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:15,070 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:15,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468737602] [2022-11-03 02:38:15,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468737602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:15,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [635471314] [2022-11-03 02:38:15,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:15,071 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:15,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:15,072 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:15,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-03 02:38:15,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:15,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:38:15,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:38:15,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:38:15,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [635471314] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:15,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:38:15,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 14 [2022-11-03 02:38:15,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607752497] [2022-11-03 02:38:15,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:15,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:38:15,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:15,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:38:15,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:38:15,505 INFO L87 Difference]: Start difference. First operand 341 states and 467 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:15,630 INFO L93 Difference]: Finished difference Result 771 states and 1092 transitions. [2022-11-03 02:38:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:38:15,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-11-03 02:38:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:15,633 INFO L225 Difference]: With dead ends: 771 [2022-11-03 02:38:15,633 INFO L226 Difference]: Without dead ends: 553 [2022-11-03 02:38:15,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:38:15,635 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 280 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:15,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 289 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:38:15,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-11-03 02:38:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 369. [2022-11-03 02:38:15,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 1.372282608695652) internal successors, (505), 368 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:15,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 505 transitions. [2022-11-03 02:38:15,668 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 505 transitions. Word has length 99 [2022-11-03 02:38:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:15,668 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 505 transitions. [2022-11-03 02:38:15,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 505 transitions. [2022-11-03 02:38:15,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 02:38:15,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:15,671 INFO L195 NwaCegarLoop]: trace histogram [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, 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 02:38:15,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:15,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:16,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:16,075 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:16,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:16,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1945542865, now seen corresponding path program 1 times [2022-11-03 02:38:16,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:16,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079691204] [2022-11-03 02:38:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:16,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:16,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:16,077 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:16,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-03 02:38:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:16,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:38:16,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:16,526 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:16,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:16,751 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:16,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079691204] [2022-11-03 02:38:16,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079691204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:16,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1017929032] [2022-11-03 02:38:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:16,751 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:16,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:16,754 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:16,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-03 02:38:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:17,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:38:17,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:38:17,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:38:17,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1017929032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:17,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:38:17,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 14 [2022-11-03 02:38:17,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905432496] [2022-11-03 02:38:17,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:17,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:38:17,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:17,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:38:17,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:38:17,104 INFO L87 Difference]: Start difference. First operand 369 states and 505 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:17,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:17,209 INFO L93 Difference]: Finished difference Result 578 states and 805 transitions. [2022-11-03 02:38:17,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:38:17,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-11-03 02:38:17,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:17,211 INFO L225 Difference]: With dead ends: 578 [2022-11-03 02:38:17,211 INFO L226 Difference]: Without dead ends: 332 [2022-11-03 02:38:17,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:38:17,212 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 283 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:17,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 279 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:38:17,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-11-03 02:38:17,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 227. [2022-11-03 02:38:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.3141592920353982) internal successors, (297), 226 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:17,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 297 transitions. [2022-11-03 02:38:17,222 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 297 transitions. Word has length 99 [2022-11-03 02:38:17,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:17,222 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 297 transitions. [2022-11-03 02:38:17,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:17,223 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 297 transitions. [2022-11-03 02:38:17,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 02:38:17,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:17,224 INFO L195 NwaCegarLoop]: trace histogram [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, 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 02:38:17,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-03 02:38:17,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:17,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:17,638 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:17,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:17,638 INFO L85 PathProgramCache]: Analyzing trace with hash -882146129, now seen corresponding path program 1 times [2022-11-03 02:38:17,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:17,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184853464] [2022-11-03 02:38:17,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:17,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:17,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:17,640 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:17,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-03 02:38:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:17,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:38:17,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:18,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:18,264 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:18,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184853464] [2022-11-03 02:38:18,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184853464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:18,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1920534885] [2022-11-03 02:38:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:18,264 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:18,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:18,265 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:18,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-03 02:38:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:18,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:38:18,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:38:18,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:38:18,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1920534885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:18,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:38:18,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 14 [2022-11-03 02:38:18,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256419522] [2022-11-03 02:38:18,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:18,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:38:18,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:18,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:38:18,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:38:18,615 INFO L87 Difference]: Start difference. First operand 227 states and 297 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:18,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:18,712 INFO L93 Difference]: Finished difference Result 377 states and 511 transitions. [2022-11-03 02:38:18,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:38:18,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-11-03 02:38:18,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:18,714 INFO L225 Difference]: With dead ends: 377 [2022-11-03 02:38:18,714 INFO L226 Difference]: Without dead ends: 273 [2022-11-03 02:38:18,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:38:18,714 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 166 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:18,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 337 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:38:18,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-03 02:38:18,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 227. [2022-11-03 02:38:18,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.3053097345132743) internal successors, (295), 226 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 295 transitions. [2022-11-03 02:38:18,723 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 295 transitions. Word has length 99 [2022-11-03 02:38:18,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:18,724 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 295 transitions. [2022-11-03 02:38:18,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:18,724 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 295 transitions. [2022-11-03 02:38:18,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 02:38:18,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:18,725 INFO L195 NwaCegarLoop]: trace histogram [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, 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 02:38:18,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:18,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:19,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:19,128 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:19,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:19,129 INFO L85 PathProgramCache]: Analyzing trace with hash 504057265, now seen corresponding path program 1 times [2022-11-03 02:38:19,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:19,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1756119541] [2022-11-03 02:38:19,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:19,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:19,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:19,130 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:19,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-03 02:38:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:19,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:38:19,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:19,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:19,769 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:19,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1756119541] [2022-11-03 02:38:19,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1756119541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:19,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [916947295] [2022-11-03 02:38:19,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:19,769 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:19,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:19,771 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:19,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-03 02:38:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:20,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:38:20,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:38:20,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:38:20,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [916947295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:20,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:38:20,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 14 [2022-11-03 02:38:20,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179433961] [2022-11-03 02:38:20,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:20,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:38:20,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:20,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:38:20,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:38:20,147 INFO L87 Difference]: Start difference. First operand 227 states and 295 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:20,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:20,252 INFO L93 Difference]: Finished difference Result 397 states and 536 transitions. [2022-11-03 02:38:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:38:20,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-11-03 02:38:20,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:20,254 INFO L225 Difference]: With dead ends: 397 [2022-11-03 02:38:20,254 INFO L226 Difference]: Without dead ends: 293 [2022-11-03 02:38:20,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:38:20,255 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 155 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:20,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 388 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:38:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-03 02:38:20,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 227. [2022-11-03 02:38:20,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.2964601769911503) internal successors, (293), 226 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:20,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 293 transitions. [2022-11-03 02:38:20,272 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 293 transitions. Word has length 99 [2022-11-03 02:38:20,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:20,272 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 293 transitions. [2022-11-03 02:38:20,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:20,272 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 293 transitions. [2022-11-03 02:38:20,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 02:38:20,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:20,274 INFO L195 NwaCegarLoop]: trace histogram [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, 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 02:38:20,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:20,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:20,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:20,676 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:20,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:20,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1184886477, now seen corresponding path program 1 times [2022-11-03 02:38:20,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:20,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839783645] [2022-11-03 02:38:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:20,678 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:20,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:20,678 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:20,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-03 02:38:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:20,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:38:20,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:21,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:21,304 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:21,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839783645] [2022-11-03 02:38:21,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839783645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:21,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [764797666] [2022-11-03 02:38:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:21,305 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:21,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:21,307 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:21,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-03 02:38:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:21,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:38:21,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:21,690 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:38:21,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:38:21,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [764797666] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:21,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:38:21,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 14 [2022-11-03 02:38:21,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423072281] [2022-11-03 02:38:21,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:21,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:38:21,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:21,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:38:21,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:38:21,692 INFO L87 Difference]: Start difference. First operand 227 states and 293 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:21,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:21,799 INFO L93 Difference]: Finished difference Result 471 states and 637 transitions. [2022-11-03 02:38:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:38:21,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-11-03 02:38:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:21,808 INFO L225 Difference]: With dead ends: 471 [2022-11-03 02:38:21,808 INFO L226 Difference]: Without dead ends: 320 [2022-11-03 02:38:21,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:38:21,810 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 143 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:21,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 449 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:38:21,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-03 02:38:21,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 227. [2022-11-03 02:38:21,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.2876106194690264) internal successors, (291), 226 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:21,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 291 transitions. [2022-11-03 02:38:21,820 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 291 transitions. Word has length 99 [2022-11-03 02:38:21,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:21,820 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 291 transitions. [2022-11-03 02:38:21,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 291 transitions. [2022-11-03 02:38:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 02:38:21,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:21,822 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:38:21,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:22,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-03 02:38:22,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:22,226 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:22,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:22,226 INFO L85 PathProgramCache]: Analyzing trace with hash -504828107, now seen corresponding path program 1 times [2022-11-03 02:38:22,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:22,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2059198800] [2022-11-03 02:38:22,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:22,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:22,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:22,228 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:22,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-03 02:38:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:22,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:38:22,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:22,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:22,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:22,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2059198800] [2022-11-03 02:38:22,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2059198800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:22,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [651119359] [2022-11-03 02:38:22,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:22,833 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:22,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:22,835 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:22,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-03 02:38:23,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:23,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:38:23,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:38:23,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:38:23,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [651119359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:23,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:38:23,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 14 [2022-11-03 02:38:23,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048344184] [2022-11-03 02:38:23,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:23,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:38:23,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:23,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:38:23,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:38:23,240 INFO L87 Difference]: Start difference. First operand 227 states and 291 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:23,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:23,350 INFO L93 Difference]: Finished difference Result 473 states and 635 transitions. [2022-11-03 02:38:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:38:23,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-11-03 02:38:23,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:23,353 INFO L225 Difference]: With dead ends: 473 [2022-11-03 02:38:23,353 INFO L226 Difference]: Without dead ends: 322 [2022-11-03 02:38:23,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:38:23,357 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 140 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:23,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 450 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:38:23,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-03 02:38:23,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 227. [2022-11-03 02:38:23,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.2787610619469028) internal successors, (289), 226 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:23,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 289 transitions. [2022-11-03 02:38:23,393 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 289 transitions. Word has length 99 [2022-11-03 02:38:23,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:23,394 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 289 transitions. [2022-11-03 02:38:23,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:23,394 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 289 transitions. [2022-11-03 02:38:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 02:38:23,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:23,395 INFO L195 NwaCegarLoop]: trace histogram [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, 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 02:38:23,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:23,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-03 02:38:23,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 02:38:23,798 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:23,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:23,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1270179255, now seen corresponding path program 1 times [2022-11-03 02:38:23,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:23,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1022410129] [2022-11-03 02:38:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:23,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:23,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:23,800 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:23,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-03 02:38:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:23,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:38:23,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:24,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:24,365 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:24,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1022410129] [2022-11-03 02:38:24,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1022410129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:24,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [125730396] [2022-11-03 02:38:24,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:24,366 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:24,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:24,369 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:24,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-03 02:38:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:24,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 02:38:24,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 02:38:24,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:38:24,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [125730396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:38:24,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:38:24,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7] total 14 [2022-11-03 02:38:24,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079589520] [2022-11-03 02:38:24,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:38:24,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:38:24,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 02:38:24,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:38:24,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:38:24,766 INFO L87 Difference]: Start difference. First operand 227 states and 289 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:24,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:38:24,881 INFO L93 Difference]: Finished difference Result 475 states and 633 transitions. [2022-11-03 02:38:24,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:38:24,881 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2022-11-03 02:38:24,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:38:24,883 INFO L225 Difference]: With dead ends: 475 [2022-11-03 02:38:24,883 INFO L226 Difference]: Without dead ends: 324 [2022-11-03 02:38:24,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:38:24,886 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 137 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:38:24,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 451 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:38:24,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-03 02:38:24,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 221. [2022-11-03 02:38:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.2772727272727273) internal successors, (281), 220 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:24,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 281 transitions. [2022-11-03 02:38:24,899 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 281 transitions. Word has length 99 [2022-11-03 02:38:24,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:38:24,900 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 281 transitions. [2022-11-03 02:38:24,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:38:24,900 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 281 transitions. [2022-11-03 02:38:24,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-03 02:38:24,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:38:24,902 INFO L195 NwaCegarLoop]: trace histogram [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, 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 02:38:24,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-03 02:38:25,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2022-11-03 02:38:25,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:25,319 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:38:25,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:38:25,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1272026297, now seen corresponding path program 1 times [2022-11-03 02:38:25,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 02:38:25,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737552392] [2022-11-03 02:38:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:25,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 02:38:25,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 02:38:25,321 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 02:38:25,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-03 02:38:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:25,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 02:38:25,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:25,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:38:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:38:25,919 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 02:38:25,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737552392] [2022-11-03 02:38:25,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737552392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:38:25,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [519963492] [2022-11-03 02:38:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:38:25,920 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 02:38:25,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 02:38:25,923 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 02:38:25,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_09d3e3f3-73dc-48b5-a3ac-b4017ab505c1/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-03 02:38:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:38:26,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-03 02:38:26,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:38:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 32 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:38:27,982 INFO L328 TraceCheckSpWp]: Computing backward predicates...