./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label55.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label55.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 892d3c9e0b7c167d810581087b0633fb7bb5cd8a7fe1ab934154adc1945085ff --- 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-b5237d8 [2022-11-22 02:40:05,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:40:05,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:40:05,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:40:05,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:40:05,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:40:05,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:40:05,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:40:05,354 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:40:05,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:40:05,361 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:40:05,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:40:05,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:40:05,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:40:05,365 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:40:05,366 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:40:05,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:40:05,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:40:05,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:40:05,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:40:05,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:40:05,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:40:05,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:40:05,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:40:05,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:40:05,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:40:05,388 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:40:05,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:40:05,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:40:05,391 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:40:05,391 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:40:05,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:40:05,393 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:40:05,394 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:40:05,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:40:05,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:40:05,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:40:05,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:40:05,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:40:05,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:40:05,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:40:05,399 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 02:40:05,420 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:40:05,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:40:05,422 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:40:05,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:40:05,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:40:05,424 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:40:05,424 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:40:05,424 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:40:05,425 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:40:05,425 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:40:05,426 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:40:05,426 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:40:05,427 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:40:05,427 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:40:05,427 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:40:05,427 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:40:05,428 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:40:05,428 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:40:05,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:40:05,429 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:40:05,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:40:05,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:40:05,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:40:05,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:40:05,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:40:05,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:40:05,431 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:40:05,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:40:05,431 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:40:05,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:40:05,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:40:05,432 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:40:05,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:40:05,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:40:05,433 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:40:05,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:40:05,433 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:40:05,434 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:40:05,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:40:05,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:40:05,435 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:40:05,435 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_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 892d3c9e0b7c167d810581087b0633fb7bb5cd8a7fe1ab934154adc1945085ff [2022-11-22 02:40:05,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:40:05,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:40:05,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:40:05,731 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:40:05,732 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:40:05,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/eca-rers2012/Problem03_label55.c [2022-11-22 02:40:08,854 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:40:09,230 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:40:09,230 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/sv-benchmarks/c/eca-rers2012/Problem03_label55.c [2022-11-22 02:40:09,250 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/data/3e64db35e/5dd94361738747978695c31ff4d87d73/FLAGa7718bd3c [2022-11-22 02:40:09,269 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/data/3e64db35e/5dd94361738747978695c31ff4d87d73 [2022-11-22 02:40:09,274 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:40:09,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:40:09,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:40:09,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:40:09,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:40:09,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:40:09" (1/1) ... [2022-11-22 02:40:09,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41d98b71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:09, skipping insertion in model container [2022-11-22 02:40:09,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:40:09" (1/1) ... [2022-11-22 02:40:09,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:40:09,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:40:10,128 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/sv-benchmarks/c/eca-rers2012/Problem03_label55.c[56086,56099] [2022-11-22 02:40:10,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:40:10,185 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:40:10,435 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/sv-benchmarks/c/eca-rers2012/Problem03_label55.c[56086,56099] [2022-11-22 02:40:10,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:40:10,467 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:40:10,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:10 WrapperNode [2022-11-22 02:40:10,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:40:10,469 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:40:10,469 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:40:10,469 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:40:10,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:10" (1/1) ... [2022-11-22 02:40:10,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:10" (1/1) ... [2022-11-22 02:40:10,626 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-22 02:40:10,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:40:10,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:40:10,628 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:40:10,628 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:40:10,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:10" (1/1) ... [2022-11-22 02:40:10,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:10" (1/1) ... [2022-11-22 02:40:10,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:10" (1/1) ... [2022-11-22 02:40:10,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:10" (1/1) ... [2022-11-22 02:40:10,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:10" (1/1) ... [2022-11-22 02:40:10,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:10" (1/1) ... [2022-11-22 02:40:10,734 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:10" (1/1) ... [2022-11-22 02:40:10,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:10" (1/1) ... [2022-11-22 02:40:10,757 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:40:10,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:40:10,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:40:10,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:40:10,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:10" (1/1) ... [2022-11-22 02:40:10,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:40:10,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:40:10,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:40:10,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:40:10,854 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:40:10,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:40:10,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:40:10,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:40:10,985 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:40:10,987 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:40:13,143 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:40:13,518 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:40:13,519 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:40:13,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:40:13 BoogieIcfgContainer [2022-11-22 02:40:13,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:40:13,558 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:40:13,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:40:13,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:40:13,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:40:09" (1/3) ... [2022-11-22 02:40:13,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295cebc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:40:13, skipping insertion in model container [2022-11-22 02:40:13,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:40:10" (2/3) ... [2022-11-22 02:40:13,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295cebc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:40:13, skipping insertion in model container [2022-11-22 02:40:13,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:40:13" (3/3) ... [2022-11-22 02:40:13,566 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label55.c [2022-11-22 02:40:13,586 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:40:13,586 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:40:13,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:40:13,666 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;@19a00da3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:40:13,667 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:40:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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) [2022-11-22 02:40:13,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 02:40:13,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:13,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:40:13,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:13,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:13,691 INFO L85 PathProgramCache]: Analyzing trace with hash 209341623, now seen corresponding path program 1 times [2022-11-22 02:40:13,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:13,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131709010] [2022-11-22 02:40:13,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:13,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:13,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:40:14,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:14,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131709010] [2022-11-22 02:40:14,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131709010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:14,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:40:14,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:40:14,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507223569] [2022-11-22 02:40:14,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:14,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:40:14,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:14,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:40:14,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:40:14,743 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 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 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2022-11-22 02:40:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:15,741 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-11-22 02:40:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:40:15,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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 143 [2022-11-22 02:40:15,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:15,756 INFO L225 Difference]: With dead ends: 440 [2022-11-22 02:40:15,756 INFO L226 Difference]: Without dead ends: 289 [2022-11-22 02:40:15,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:40:15,765 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:15,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:40:15,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-22 02:40:15,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-11-22 02:40:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8923611111111112) internal successors, (545), 288 states have internal predecessors, (545), 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) [2022-11-22 02:40:15,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 545 transitions. [2022-11-22 02:40:15,849 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 545 transitions. Word has length 143 [2022-11-22 02:40:15,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:15,853 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 545 transitions. [2022-11-22 02:40:15,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 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) [2022-11-22 02:40:15,854 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 545 transitions. [2022-11-22 02:40:15,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-22 02:40:15,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:15,866 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:40:15,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:40:15,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:15,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:15,869 INFO L85 PathProgramCache]: Analyzing trace with hash 874733531, now seen corresponding path program 1 times [2022-11-22 02:40:15,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:15,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298274641] [2022-11-22 02:40:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:15,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:40:16,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:16,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298274641] [2022-11-22 02:40:16,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298274641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:16,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:40:16,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:40:16,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110781947] [2022-11-22 02:40:16,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:16,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:40:16,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:16,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:40:16,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:40:16,204 INFO L87 Difference]: Start difference. First operand 289 states and 545 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 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) [2022-11-22 02:40:17,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:17,164 INFO L93 Difference]: Finished difference Result 863 states and 1632 transitions. [2022-11-22 02:40:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:40:17,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 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 149 [2022-11-22 02:40:17,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:17,168 INFO L225 Difference]: With dead ends: 863 [2022-11-22 02:40:17,169 INFO L226 Difference]: Without dead ends: 575 [2022-11-22 02:40:17,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:40:17,171 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 152 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:17,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 95 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:40:17,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-22 02:40:17,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-11-22 02:40:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.5609756097560976) internal successors, (896), 574 states have internal predecessors, (896), 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) [2022-11-22 02:40:17,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 896 transitions. [2022-11-22 02:40:17,205 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 896 transitions. Word has length 149 [2022-11-22 02:40:17,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:17,206 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 896 transitions. [2022-11-22 02:40:17,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 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) [2022-11-22 02:40:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 896 transitions. [2022-11-22 02:40:17,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-22 02:40:17,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:17,210 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:40:17,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:40:17,211 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:17,211 INFO L85 PathProgramCache]: Analyzing trace with hash -69091252, now seen corresponding path program 1 times [2022-11-22 02:40:17,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:17,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306581184] [2022-11-22 02:40:17,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:17,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:40:17,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:17,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306581184] [2022-11-22 02:40:17,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306581184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:17,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:40:17,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:40:17,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130544322] [2022-11-22 02:40:17,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:17,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:40:17,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:17,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:40:17,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:40:17,520 INFO L87 Difference]: Start difference. First operand 575 states and 896 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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) [2022-11-22 02:40:18,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:18,486 INFO L93 Difference]: Finished difference Result 1723 states and 2686 transitions. [2022-11-22 02:40:18,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:40:18,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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 155 [2022-11-22 02:40:18,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:18,492 INFO L225 Difference]: With dead ends: 1723 [2022-11-22 02:40:18,492 INFO L226 Difference]: Without dead ends: 1149 [2022-11-22 02:40:18,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:40:18,495 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 168 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:18,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 107 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:40:18,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-11-22 02:40:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1147. [2022-11-22 02:40:18,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.4825479930191972) internal successors, (1699), 1146 states have internal predecessors, (1699), 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) [2022-11-22 02:40:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1699 transitions. [2022-11-22 02:40:18,530 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1699 transitions. Word has length 155 [2022-11-22 02:40:18,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:18,531 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1699 transitions. [2022-11-22 02:40:18,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 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) [2022-11-22 02:40:18,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1699 transitions. [2022-11-22 02:40:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-22 02:40:18,535 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:18,535 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:40:18,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:40:18,536 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:18,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:18,536 INFO L85 PathProgramCache]: Analyzing trace with hash 836227386, now seen corresponding path program 1 times [2022-11-22 02:40:18,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:18,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666851702] [2022-11-22 02:40:18,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:18,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:40:18,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:18,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666851702] [2022-11-22 02:40:18,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666851702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:18,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:40:18,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:40:18,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851202089] [2022-11-22 02:40:18,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:18,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:40:18,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:18,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:40:18,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:40:18,726 INFO L87 Difference]: Start difference. First operand 1147 states and 1699 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 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) [2022-11-22 02:40:19,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:19,595 INFO L93 Difference]: Finished difference Result 3437 states and 5094 transitions. [2022-11-22 02:40:19,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:40:19,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 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 157 [2022-11-22 02:40:19,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:19,604 INFO L225 Difference]: With dead ends: 3437 [2022-11-22 02:40:19,604 INFO L226 Difference]: Without dead ends: 2291 [2022-11-22 02:40:19,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:40:19,607 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 159 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:19,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 23 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:40:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-11-22 02:40:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2022-11-22 02:40:19,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.4480349344978165) internal successors, (3316), 2290 states have internal predecessors, (3316), 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) [2022-11-22 02:40:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3316 transitions. [2022-11-22 02:40:19,681 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3316 transitions. Word has length 157 [2022-11-22 02:40:19,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:19,682 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3316 transitions. [2022-11-22 02:40:19,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 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) [2022-11-22 02:40:19,682 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3316 transitions. [2022-11-22 02:40:19,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-22 02:40:19,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:19,688 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:40:19,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:40:19,688 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:19,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:19,689 INFO L85 PathProgramCache]: Analyzing trace with hash 303763199, now seen corresponding path program 1 times [2022-11-22 02:40:19,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:19,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398514487] [2022-11-22 02:40:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:19,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:40:19,913 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:19,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398514487] [2022-11-22 02:40:19,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398514487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:19,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:40:19,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:40:19,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643731449] [2022-11-22 02:40:19,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:19,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:40:19,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:19,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:40:19,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:40:19,916 INFO L87 Difference]: Start difference. First operand 2291 states and 3316 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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) [2022-11-22 02:40:20,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:20,845 INFO L93 Difference]: Finished difference Result 5725 states and 8585 transitions. [2022-11-22 02:40:20,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:40:20,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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 164 [2022-11-22 02:40:20,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:20,857 INFO L225 Difference]: With dead ends: 5725 [2022-11-22 02:40:20,857 INFO L226 Difference]: Without dead ends: 3435 [2022-11-22 02:40:20,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:40:20,861 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 150 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:20,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 258 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:40:20,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2022-11-22 02:40:20,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2022-11-22 02:40:20,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.36924868957484) internal successors, (4702), 3434 states have internal predecessors, (4702), 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) [2022-11-22 02:40:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4702 transitions. [2022-11-22 02:40:20,956 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4702 transitions. Word has length 164 [2022-11-22 02:40:20,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:20,958 INFO L495 AbstractCegarLoop]: Abstraction has 3435 states and 4702 transitions. [2022-11-22 02:40:20,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 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) [2022-11-22 02:40:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4702 transitions. [2022-11-22 02:40:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-22 02:40:20,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:20,971 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:40:20,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:40:20,972 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:20,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:20,972 INFO L85 PathProgramCache]: Analyzing trace with hash 610400796, now seen corresponding path program 1 times [2022-11-22 02:40:20,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:20,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773958023] [2022-11-22 02:40:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:20,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-22 02:40:21,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:21,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773958023] [2022-11-22 02:40:21,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773958023] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:21,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:40:21,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:40:21,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531874903] [2022-11-22 02:40:21,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:21,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:40:21,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:21,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:40:21,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:40:21,172 INFO L87 Difference]: Start difference. First operand 3435 states and 4702 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2022-11-22 02:40:21,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:21,646 INFO L93 Difference]: Finished difference Result 6869 states and 9403 transitions. [2022-11-22 02:40:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:40:21,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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 176 [2022-11-22 02:40:21,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:21,660 INFO L225 Difference]: With dead ends: 6869 [2022-11-22 02:40:21,660 INFO L226 Difference]: Without dead ends: 3435 [2022-11-22 02:40:21,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:40:21,666 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:21,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:40:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2022-11-22 02:40:21,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2022-11-22 02:40:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.320326150262085) internal successors, (4534), 3434 states have internal predecessors, (4534), 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) [2022-11-22 02:40:21,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4534 transitions. [2022-11-22 02:40:21,801 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4534 transitions. Word has length 176 [2022-11-22 02:40:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:21,802 INFO L495 AbstractCegarLoop]: Abstraction has 3435 states and 4534 transitions. [2022-11-22 02:40:21,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 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) [2022-11-22 02:40:21,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4534 transitions. [2022-11-22 02:40:21,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-22 02:40:21,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:21,810 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:40:21,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:40:21,811 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:21,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:21,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2077845564, now seen corresponding path program 1 times [2022-11-22 02:40:21,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:21,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353054007] [2022-11-22 02:40:21,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:21,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:40:22,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:22,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353054007] [2022-11-22 02:40:22,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353054007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:22,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:40:22,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:40:22,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191592377] [2022-11-22 02:40:22,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:22,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:40:22,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:22,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:40:22,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:40:22,292 INFO L87 Difference]: Start difference. First operand 3435 states and 4534 transitions. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 states have internal predecessors, (194), 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) [2022-11-22 02:40:23,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:23,281 INFO L93 Difference]: Finished difference Result 8585 states and 11411 transitions. [2022-11-22 02:40:23,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:40:23,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 states have internal predecessors, (194), 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 199 [2022-11-22 02:40:23,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:23,300 INFO L225 Difference]: With dead ends: 8585 [2022-11-22 02:40:23,300 INFO L226 Difference]: Without dead ends: 5151 [2022-11-22 02:40:23,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:40:23,307 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 434 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:23,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 11 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:40:23,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2022-11-22 02:40:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 5151. [2022-11-22 02:40:23,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5151 states, 5150 states have (on average 1.2741747572815534) internal successors, (6562), 5150 states have internal predecessors, (6562), 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) [2022-11-22 02:40:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5151 states to 5151 states and 6562 transitions. [2022-11-22 02:40:23,431 INFO L78 Accepts]: Start accepts. Automaton has 5151 states and 6562 transitions. Word has length 199 [2022-11-22 02:40:23,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:23,432 INFO L495 AbstractCegarLoop]: Abstraction has 5151 states and 6562 transitions. [2022-11-22 02:40:23,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 states have internal predecessors, (194), 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) [2022-11-22 02:40:23,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5151 states and 6562 transitions. [2022-11-22 02:40:23,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-11-22 02:40:23,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:23,444 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:40:23,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 02:40:23,444 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:23,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:23,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1430663644, now seen corresponding path program 1 times [2022-11-22 02:40:23,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:23,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844922325] [2022-11-22 02:40:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:23,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-22 02:40:23,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:23,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844922325] [2022-11-22 02:40:23,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844922325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:23,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:40:23,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:40:23,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323685532] [2022-11-22 02:40:23,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:23,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:40:23,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:23,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:40:23,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:40:23,919 INFO L87 Difference]: Start difference. First operand 5151 states and 6562 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 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) [2022-11-22 02:40:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:25,471 INFO L93 Difference]: Finished difference Result 20601 states and 26245 transitions. [2022-11-22 02:40:25,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:40:25,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 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 223 [2022-11-22 02:40:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:25,533 INFO L225 Difference]: With dead ends: 20601 [2022-11-22 02:40:25,537 INFO L226 Difference]: Without dead ends: 15451 [2022-11-22 02:40:25,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:40:25,547 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 397 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:25,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 19 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-22 02:40:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15451 states. [2022-11-22 02:40:25,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15451 to 15447. [2022-11-22 02:40:26,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15447 states, 15446 states have (on average 1.2685484915188399) internal successors, (19594), 15446 states have internal predecessors, (19594), 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) [2022-11-22 02:40:26,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15447 states to 15447 states and 19594 transitions. [2022-11-22 02:40:26,061 INFO L78 Accepts]: Start accepts. Automaton has 15447 states and 19594 transitions. Word has length 223 [2022-11-22 02:40:26,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:26,061 INFO L495 AbstractCegarLoop]: Abstraction has 15447 states and 19594 transitions. [2022-11-22 02:40:26,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 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) [2022-11-22 02:40:26,062 INFO L276 IsEmpty]: Start isEmpty. Operand 15447 states and 19594 transitions. [2022-11-22 02:40:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-11-22 02:40:26,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:26,073 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:40:26,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 02:40:26,073 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:26,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:26,074 INFO L85 PathProgramCache]: Analyzing trace with hash 888791995, now seen corresponding path program 1 times [2022-11-22 02:40:26,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:26,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234960793] [2022-11-22 02:40:26,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:26,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-22 02:40:26,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:26,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234960793] [2022-11-22 02:40:26,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234960793] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:26,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:40:26,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:40:26,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583274548] [2022-11-22 02:40:26,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:26,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:40:26,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:26,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:40:26,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:40:26,612 INFO L87 Difference]: Start difference. First operand 15447 states and 19594 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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) [2022-11-22 02:40:27,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:27,757 INFO L93 Difference]: Finished difference Result 39759 states and 49908 transitions. [2022-11-22 02:40:27,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:40:27,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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 242 [2022-11-22 02:40:27,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:27,815 INFO L225 Difference]: With dead ends: 39759 [2022-11-22 02:40:27,816 INFO L226 Difference]: Without dead ends: 24313 [2022-11-22 02:40:27,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:40:27,840 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 134 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:27,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 70 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 02:40:27,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24313 states. [2022-11-22 02:40:28,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24313 to 22454. [2022-11-22 02:40:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22454 states, 22453 states have (on average 1.2466485547588295) internal successors, (27991), 22453 states have internal predecessors, (27991), 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) [2022-11-22 02:40:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22454 states to 22454 states and 27991 transitions. [2022-11-22 02:40:28,566 INFO L78 Accepts]: Start accepts. Automaton has 22454 states and 27991 transitions. Word has length 242 [2022-11-22 02:40:28,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:28,566 INFO L495 AbstractCegarLoop]: Abstraction has 22454 states and 27991 transitions. [2022-11-22 02:40:28,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 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) [2022-11-22 02:40:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 22454 states and 27991 transitions. [2022-11-22 02:40:28,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-11-22 02:40:28,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:28,583 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:40:28,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 02:40:28,584 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:28,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:28,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1937884196, now seen corresponding path program 1 times [2022-11-22 02:40:28,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:28,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306841077] [2022-11-22 02:40:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:28,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 108 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:40:29,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:29,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306841077] [2022-11-22 02:40:29,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306841077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:40:29,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078081705] [2022-11-22 02:40:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:29,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:40:29,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:40:29,340 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:40:29,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:40:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:29,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:40:29,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:40:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-22 02:40:29,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:40:29,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078081705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:29,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:40:29,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-22 02:40:29,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890244883] [2022-11-22 02:40:29,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:29,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:40:29,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:29,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:40:29,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:40:29,892 INFO L87 Difference]: Start difference. First operand 22454 states and 27991 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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) [2022-11-22 02:40:30,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:30,895 INFO L93 Difference]: Finished difference Result 49340 states and 62806 transitions. [2022-11-22 02:40:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:40:30,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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 249 [2022-11-22 02:40:30,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:30,954 INFO L225 Difference]: With dead ends: 49340 [2022-11-22 02:40:30,954 INFO L226 Difference]: Without dead ends: 26887 [2022-11-22 02:40:30,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:40:30,975 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 39 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:30,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 189 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:40:30,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26887 states. [2022-11-22 02:40:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26887 to 26887. [2022-11-22 02:40:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26887 states, 26886 states have (on average 1.2797366659227851) internal successors, (34407), 26886 states have internal predecessors, (34407), 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) [2022-11-22 02:40:31,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26887 states to 26887 states and 34407 transitions. [2022-11-22 02:40:31,918 INFO L78 Accepts]: Start accepts. Automaton has 26887 states and 34407 transitions. Word has length 249 [2022-11-22 02:40:31,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:31,919 INFO L495 AbstractCegarLoop]: Abstraction has 26887 states and 34407 transitions. [2022-11-22 02:40:31,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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) [2022-11-22 02:40:31,919 INFO L276 IsEmpty]: Start isEmpty. Operand 26887 states and 34407 transitions. [2022-11-22 02:40:31,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-11-22 02:40:31,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:31,935 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:40:31,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:40:32,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 02:40:32,142 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:32,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:32,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1571747164, now seen corresponding path program 1 times [2022-11-22 02:40:32,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:32,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396262825] [2022-11-22 02:40:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:32,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-22 02:40:32,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:32,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396262825] [2022-11-22 02:40:32,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396262825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:32,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:40:32,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:40:32,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013627977] [2022-11-22 02:40:32,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:32,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:40:32,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:32,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:40:32,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:40:32,528 INFO L87 Difference]: Start difference. First operand 26887 states and 34407 transitions. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 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) [2022-11-22 02:40:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:34,037 INFO L93 Difference]: Finished difference Result 82947 states and 105870 transitions. [2022-11-22 02:40:34,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:40:34,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 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 259 [2022-11-22 02:40:34,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:34,138 INFO L225 Difference]: With dead ends: 82947 [2022-11-22 02:40:34,138 INFO L226 Difference]: Without dead ends: 56061 [2022-11-22 02:40:34,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:40:34,168 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 398 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:34,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 272 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 02:40:34,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56061 states. [2022-11-22 02:40:35,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56061 to 56059. [2022-11-22 02:40:35,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56059 states, 56058 states have (on average 1.2594098968925043) internal successors, (70600), 56058 states have internal predecessors, (70600), 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) [2022-11-22 02:40:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56059 states to 56059 states and 70600 transitions. [2022-11-22 02:40:35,627 INFO L78 Accepts]: Start accepts. Automaton has 56059 states and 70600 transitions. Word has length 259 [2022-11-22 02:40:35,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:35,627 INFO L495 AbstractCegarLoop]: Abstraction has 56059 states and 70600 transitions. [2022-11-22 02:40:35,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 3 states have internal predecessors, (185), 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) [2022-11-22 02:40:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 56059 states and 70600 transitions. [2022-11-22 02:40:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-11-22 02:40:35,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:35,833 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:40:35,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 02:40:35,834 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:35,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:35,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1561383851, now seen corresponding path program 1 times [2022-11-22 02:40:35,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:35,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467957351] [2022-11-22 02:40:35,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:35,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 121 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-22 02:40:36,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:36,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467957351] [2022-11-22 02:40:36,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467957351] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:40:36,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140085991] [2022-11-22 02:40:36,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:36,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:40:36,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:40:36,661 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:40:36,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:40:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:36,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:40:36,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:40:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-22 02:40:37,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:40:37,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140085991] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:37,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:40:37,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-22 02:40:37,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680514680] [2022-11-22 02:40:37,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:37,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:40:37,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:37,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:40:37,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:40:37,151 INFO L87 Difference]: Start difference. First operand 56059 states and 70600 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) [2022-11-22 02:40:38,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:38,528 INFO L93 Difference]: Finished difference Result 135569 states and 170785 transitions. [2022-11-22 02:40:38,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:40:38,528 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 262 [2022-11-22 02:40:38,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:38,660 INFO L225 Difference]: With dead ends: 135569 [2022-11-22 02:40:38,660 INFO L226 Difference]: Without dead ends: 80083 [2022-11-22 02:40:38,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:40:38,696 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:38,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 60 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:40:38,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80083 states. [2022-11-22 02:40:40,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80083 to 78796. [2022-11-22 02:40:40,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78796 states, 78795 states have (on average 1.2329208706136177) internal successors, (97148), 78795 states have internal predecessors, (97148), 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) [2022-11-22 02:40:40,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78796 states to 78796 states and 97148 transitions. [2022-11-22 02:40:40,321 INFO L78 Accepts]: Start accepts. Automaton has 78796 states and 97148 transitions. Word has length 262 [2022-11-22 02:40:40,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:40,322 INFO L495 AbstractCegarLoop]: Abstraction has 78796 states and 97148 transitions. [2022-11-22 02:40:40,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) [2022-11-22 02:40:40,323 INFO L276 IsEmpty]: Start isEmpty. Operand 78796 states and 97148 transitions. [2022-11-22 02:40:40,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-11-22 02:40:40,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:40,375 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-22 02:40:40,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 02:40:40,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:40:40,582 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:40,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:40,583 INFO L85 PathProgramCache]: Analyzing trace with hash -207108181, now seen corresponding path program 1 times [2022-11-22 02:40:40,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:40,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507904655] [2022-11-22 02:40:40,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:40,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:40:41,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:41,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507904655] [2022-11-22 02:40:41,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507904655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:41,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:40:41,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:40:41,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104351410] [2022-11-22 02:40:41,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:41,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:40:41,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:41,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:40:41,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:40:41,509 INFO L87 Difference]: Start difference. First operand 78796 states and 97148 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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) [2022-11-22 02:40:42,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:42,961 INFO L93 Difference]: Finished difference Result 171462 states and 211035 transitions. [2022-11-22 02:40:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:40:42,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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 292 [2022-11-22 02:40:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:43,074 INFO L225 Difference]: With dead ends: 171462 [2022-11-22 02:40:43,074 INFO L226 Difference]: Without dead ends: 93239 [2022-11-22 02:40:43,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:40:43,114 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:43,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 243 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 02:40:43,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93239 states. [2022-11-22 02:40:44,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93239 to 92524. [2022-11-22 02:40:44,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92524 states, 92523 states have (on average 1.2101855754785296) internal successors, (111970), 92523 states have internal predecessors, (111970), 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) [2022-11-22 02:40:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92524 states to 92524 states and 111970 transitions. [2022-11-22 02:40:45,240 INFO L78 Accepts]: Start accepts. Automaton has 92524 states and 111970 transitions. Word has length 292 [2022-11-22 02:40:45,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:45,243 INFO L495 AbstractCegarLoop]: Abstraction has 92524 states and 111970 transitions. [2022-11-22 02:40:45,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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) [2022-11-22 02:40:45,243 INFO L276 IsEmpty]: Start isEmpty. Operand 92524 states and 111970 transitions. [2022-11-22 02:40:45,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-11-22 02:40:45,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:45,268 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-22 02:40:45,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 02:40:45,269 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:45,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:45,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1523539312, now seen corresponding path program 1 times [2022-11-22 02:40:45,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:45,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681685291] [2022-11-22 02:40:45,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:45,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:40:45,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:45,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681685291] [2022-11-22 02:40:45,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681685291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:45,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:40:45,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:40:45,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366640666] [2022-11-22 02:40:45,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:45,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:40:45,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:45,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:40:45,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:40:45,851 INFO L87 Difference]: Start difference. First operand 92524 states and 111970 transitions. Second operand has 4 states, 4 states have (on average 77.0) internal successors, (308), 3 states have internal predecessors, (308), 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) [2022-11-22 02:40:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:47,752 INFO L93 Difference]: Finished difference Result 186620 states and 225749 transitions. [2022-11-22 02:40:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:40:47,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.0) internal successors, (308), 3 states have internal predecessors, (308), 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 308 [2022-11-22 02:40:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:47,851 INFO L225 Difference]: With dead ends: 186620 [2022-11-22 02:40:47,852 INFO L226 Difference]: Without dead ends: 94812 [2022-11-22 02:40:47,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:40:47,898 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:47,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 63 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 02:40:47,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94812 states. [2022-11-22 02:40:49,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94812 to 92095. [2022-11-22 02:40:49,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92095 states, 92094 states have (on average 1.2099050969661433) internal successors, (111425), 92094 states have internal predecessors, (111425), 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) [2022-11-22 02:40:49,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92095 states to 92095 states and 111425 transitions. [2022-11-22 02:40:49,708 INFO L78 Accepts]: Start accepts. Automaton has 92095 states and 111425 transitions. Word has length 308 [2022-11-22 02:40:49,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:49,709 INFO L495 AbstractCegarLoop]: Abstraction has 92095 states and 111425 transitions. [2022-11-22 02:40:49,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.0) internal successors, (308), 3 states have internal predecessors, (308), 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) [2022-11-22 02:40:49,709 INFO L276 IsEmpty]: Start isEmpty. Operand 92095 states and 111425 transitions. [2022-11-22 02:40:49,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-11-22 02:40:49,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:49,739 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-22 02:40:49,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-22 02:40:49,740 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:49,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:49,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1407130299, now seen corresponding path program 1 times [2022-11-22 02:40:49,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:49,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386625859] [2022-11-22 02:40:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:49,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 169 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:40:51,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:51,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386625859] [2022-11-22 02:40:51,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386625859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:40:51,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043061596] [2022-11-22 02:40:51,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:51,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:40:51,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:40:51,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:40:51,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:40:51,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:51,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:40:51,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:40:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:40:51,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:40:51,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043061596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:51,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:40:51,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2022-11-22 02:40:51,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011355831] [2022-11-22 02:40:51,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:51,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:40:51,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:51,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:40:51,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:40:51,985 INFO L87 Difference]: Start difference. First operand 92095 states and 111425 transitions. Second operand has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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) [2022-11-22 02:40:54,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:54,046 INFO L93 Difference]: Finished difference Result 202779 states and 244505 transitions. [2022-11-22 02:40:54,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:40:54,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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 313 [2022-11-22 02:40:54,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:40:54,190 INFO L225 Difference]: With dead ends: 202779 [2022-11-22 02:40:54,190 INFO L226 Difference]: Without dead ends: 111400 [2022-11-22 02:40:54,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:40:54,238 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 225 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:40:54,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 194 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 02:40:54,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111400 states. [2022-11-22 02:40:56,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111400 to 105108. [2022-11-22 02:40:56,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105108 states, 105107 states have (on average 1.171977128069491) internal successors, (123183), 105107 states have internal predecessors, (123183), 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) [2022-11-22 02:40:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105108 states to 105108 states and 123183 transitions. [2022-11-22 02:40:56,346 INFO L78 Accepts]: Start accepts. Automaton has 105108 states and 123183 transitions. Word has length 313 [2022-11-22 02:40:56,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:40:56,347 INFO L495 AbstractCegarLoop]: Abstraction has 105108 states and 123183 transitions. [2022-11-22 02:40:56,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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) [2022-11-22 02:40:56,347 INFO L276 IsEmpty]: Start isEmpty. Operand 105108 states and 123183 transitions. [2022-11-22 02:40:56,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-11-22 02:40:56,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:40:56,375 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-22 02:40:56,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 02:40:56,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 02:40:56,580 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:40:56,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:40:56,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1254474251, now seen corresponding path program 1 times [2022-11-22 02:40:56,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:40:56,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497526246] [2022-11-22 02:40:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:56,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:40:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-22 02:40:57,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:40:57,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497526246] [2022-11-22 02:40:57,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497526246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:40:57,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679945875] [2022-11-22 02:40:57,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:40:57,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:40:57,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:40:57,785 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:40:57,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:40:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:40:58,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:40:58,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:40:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-22 02:40:58,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:40:58,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679945875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:40:58,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:40:58,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-22 02:40:58,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486976863] [2022-11-22 02:40:58,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:40:58,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:40:58,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:40:58,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:40:58,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:40:58,281 INFO L87 Difference]: Start difference. First operand 105108 states and 123183 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 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) [2022-11-22 02:40:59,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:40:59,977 INFO L93 Difference]: Finished difference Result 212932 states and 249722 transitions. [2022-11-22 02:40:59,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:40:59,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 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 315 [2022-11-22 02:40:59,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:41:00,113 INFO L225 Difference]: With dead ends: 212932 [2022-11-22 02:41:00,113 INFO L226 Difference]: Without dead ends: 107825 [2022-11-22 02:41:00,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:41:00,141 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:41:00,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 252 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 02:41:00,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107825 states. [2022-11-22 02:41:01,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107825 to 106967. [2022-11-22 02:41:01,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106967 states, 106966 states have (on average 1.1673802890638147) internal successors, (124870), 106966 states have internal predecessors, (124870), 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) [2022-11-22 02:41:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106967 states to 106967 states and 124870 transitions. [2022-11-22 02:41:02,169 INFO L78 Accepts]: Start accepts. Automaton has 106967 states and 124870 transitions. Word has length 315 [2022-11-22 02:41:02,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:41:02,169 INFO L495 AbstractCegarLoop]: Abstraction has 106967 states and 124870 transitions. [2022-11-22 02:41:02,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 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) [2022-11-22 02:41:02,170 INFO L276 IsEmpty]: Start isEmpty. Operand 106967 states and 124870 transitions. [2022-11-22 02:41:02,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-11-22 02:41:02,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:41:02,205 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-22 02:41:02,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-22 02:41:02,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 02:41:02,411 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:41:02,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:41:02,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1791140274, now seen corresponding path program 1 times [2022-11-22 02:41:02,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:41:02,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238401250] [2022-11-22 02:41:02,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:41:02,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:41:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:41:02,993 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 203 proven. 82 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-22 02:41:02,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:41:02,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238401250] [2022-11-22 02:41:02,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238401250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:41:02,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043581934] [2022-11-22 02:41:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:41:02,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:41:02,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:41:02,996 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:41:03,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c9b297a-b47e-4693-8050-6df52398e4fb/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:41:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:41:03,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:41:03,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:41:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 243 proven. 40 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-22 02:41:03,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:41:03,814 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 243 proven. 40 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-22 02:41:03,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043581934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:41:03,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [240884792] [2022-11-22 02:41:03,843 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-11-22 02:41:03,843 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:41:03,847 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:41:03,853 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:41:03,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs