./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label21.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/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_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label21.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/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_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/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 cddd396d9051dbeeab842f0229e49128c7a3af364245c973ac8bbf7d2e9e624d --- 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 01:30:06,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:30:06,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:30:06,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:30:06,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:30:06,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:30:06,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:30:06,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:30:06,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:30:06,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:30:06,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:30:06,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:30:06,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:30:06,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:30:06,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:30:06,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:30:06,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:30:06,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:30:06,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:30:06,711 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:30:06,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:30:06,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:30:06,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:30:06,720 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:30:06,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:30:06,725 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:30:06,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:30:06,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:30:06,727 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:30:06,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:30:06,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:30:06,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:30:06,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:30:06,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:30:06,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:30:06,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:30:06,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:30:06,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:30:06,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:30:06,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:30:06,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:30:06,751 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-22 01:30:06,793 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:30:06,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:30:06,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:30:06,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:30:06,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:30:06,794 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:30:06,795 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:30:06,795 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:30:06,795 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:30:06,795 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:30:06,796 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:30:06,796 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:30:06,796 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:30:06,796 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:30:06,796 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:30:06,797 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:30:06,797 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:30:06,797 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:30:06,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:30:06,798 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:30:06,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:30:06,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:30:06,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:30:06,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 01:30:06,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:30:06,799 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 01:30:06,799 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:30:06,800 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 01:30:06,800 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:30:06,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 01:30:06,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:30:06,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:30:06,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:30:06,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:30:06,801 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:30:06,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:30:06,802 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 01:30:06,802 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:30:06,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:30:06,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 01:30:06,802 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:30:06,803 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_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cddd396d9051dbeeab842f0229e49128c7a3af364245c973ac8bbf7d2e9e624d [2022-11-22 01:30:07,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:30:07,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:30:07,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:30:07,184 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:30:07,185 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:30:07,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/eca-rers2012/Problem03_label21.c [2022-11-22 01:30:10,969 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:30:11,446 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:30:11,455 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/sv-benchmarks/c/eca-rers2012/Problem03_label21.c [2022-11-22 01:30:11,481 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/data/c44cb2e88/2c89dbe44f344326a4cae1f5d5c20fd8/FLAGfb8f9f762 [2022-11-22 01:30:11,504 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/data/c44cb2e88/2c89dbe44f344326a4cae1f5d5c20fd8 [2022-11-22 01:30:11,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:30:11,513 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:30:11,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:30:11,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:30:11,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:30:11,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:30:11" (1/1) ... [2022-11-22 01:30:11,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69d2d03e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:30:11, skipping insertion in model container [2022-11-22 01:30:11,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:30:11" (1/1) ... [2022-11-22 01:30:11,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:30:11,639 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:30:12,572 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_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/sv-benchmarks/c/eca-rers2012/Problem03_label21.c[61500,61513] [2022-11-22 01:30:12,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:30:12,669 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:30:13,089 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_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/sv-benchmarks/c/eca-rers2012/Problem03_label21.c[61500,61513] [2022-11-22 01:30:13,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:30:13,122 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:30:13,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:30:13 WrapperNode [2022-11-22 01:30:13,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:30:13,125 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:30:13,125 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:30:13,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:30:13,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:30:13" (1/1) ... [2022-11-22 01:30:13,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:30:13" (1/1) ... [2022-11-22 01:30:13,313 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-11-22 01:30:13,313 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:30:13,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:30:13,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:30:13,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:30:13,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:30:13" (1/1) ... [2022-11-22 01:30:13,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:30:13" (1/1) ... [2022-11-22 01:30:13,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:30:13" (1/1) ... [2022-11-22 01:30:13,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:30:13" (1/1) ... [2022-11-22 01:30:13,384 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:30:13" (1/1) ... [2022-11-22 01:30:13,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:30:13" (1/1) ... [2022-11-22 01:30:13,406 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:30:13" (1/1) ... [2022-11-22 01:30:13,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:30:13" (1/1) ... [2022-11-22 01:30:13,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:30:13,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:30:13,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:30:13,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:30:13,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:30:13" (1/1) ... [2022-11-22 01:30:13,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:30:13,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:30:13,497 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:30:13,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:30:13,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:30:13,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 01:30:13,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:30:13,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:30:13,742 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:30:13,745 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:30:16,431 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:30:16,955 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:30:16,955 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 01:30:16,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:30:16 BoogieIcfgContainer [2022-11-22 01:30:16,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:30:16,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:30:16,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:30:16,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:30:16,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:30:11" (1/3) ... [2022-11-22 01:30:16,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34947059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:30:16, skipping insertion in model container [2022-11-22 01:30:16,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:30:13" (2/3) ... [2022-11-22 01:30:16,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34947059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:30:16, skipping insertion in model container [2022-11-22 01:30:16,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:30:16" (3/3) ... [2022-11-22 01:30:16,974 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label21.c [2022-11-22 01:30:17,022 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:30:17,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 01:30:17,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:30:17,131 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;@73e255ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:30:17,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 01:30:17,140 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 01:30:17,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-22 01:30:17,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:17,157 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 01:30:17,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash 209357629, now seen corresponding path program 1 times [2022-11-22 01:30:17,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:17,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668434567] [2022-11-22 01:30:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:17,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:18,224 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 01:30:18,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:18,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668434567] [2022-11-22 01:30:18,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668434567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:18,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:18,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:30:18,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430814511] [2022-11-22 01:30:18,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:18,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:18,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:18,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:18,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:18,299 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 01:30:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:19,648 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2022-11-22 01:30:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:19,652 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 01:30:19,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:19,667 INFO L225 Difference]: With dead ends: 440 [2022-11-22 01:30:19,668 INFO L226 Difference]: Without dead ends: 289 [2022-11-22 01:30:19,672 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 01:30:19,676 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:19,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 51 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 01:30:19,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-11-22 01:30:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-11-22 01:30:19,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.7881944444444444) internal successors, (515), 288 states have internal predecessors, (515), 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 01:30:19,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 515 transitions. [2022-11-22 01:30:19,751 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 515 transitions. Word has length 143 [2022-11-22 01:30:19,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:19,753 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 515 transitions. [2022-11-22 01:30:19,753 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 01:30:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 515 transitions. [2022-11-22 01:30:19,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-22 01:30:19,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:19,759 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-11-22 01:30:19,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:30:19,760 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:19,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:19,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1094397916, now seen corresponding path program 1 times [2022-11-22 01:30:19,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:19,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347889366] [2022-11-22 01:30:19,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:19,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:19,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:30:20,044 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:20,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347889366] [2022-11-22 01:30:20,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347889366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:20,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:20,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:30:20,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690422678] [2022-11-22 01:30:20,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:20,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:20,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:20,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:20,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:20,049 INFO L87 Difference]: Start difference. First operand 289 states and 515 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 01:30:21,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:21,294 INFO L93 Difference]: Finished difference Result 863 states and 1542 transitions. [2022-11-22 01:30:21,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:21,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 151 [2022-11-22 01:30:21,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:21,300 INFO L225 Difference]: With dead ends: 863 [2022-11-22 01:30:21,300 INFO L226 Difference]: Without dead ends: 575 [2022-11-22 01:30:21,302 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 01:30:21,304 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 157 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:21,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 25 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 01:30:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-22 01:30:21,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-11-22 01:30:21,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.740418118466899) internal successors, (999), 574 states have internal predecessors, (999), 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 01:30:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 999 transitions. [2022-11-22 01:30:21,343 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 999 transitions. Word has length 151 [2022-11-22 01:30:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:21,343 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 999 transitions. [2022-11-22 01:30:21,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 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 01:30:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 999 transitions. [2022-11-22 01:30:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-22 01:30:21,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:21,351 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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 01:30:21,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:30:21,351 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:21,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:21,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1051089533, now seen corresponding path program 1 times [2022-11-22 01:30:21,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:21,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105668924] [2022-11-22 01:30:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:21,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:30:21,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:21,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105668924] [2022-11-22 01:30:21,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105668924] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:21,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:21,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:30:21,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591601476] [2022-11-22 01:30:21,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:21,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:21,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:21,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:21,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:21,755 INFO L87 Difference]: Start difference. First operand 575 states and 999 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 01:30:22,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:22,941 INFO L93 Difference]: Finished difference Result 1721 states and 2994 transitions. [2022-11-22 01:30:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:22,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 163 [2022-11-22 01:30:22,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:22,948 INFO L225 Difference]: With dead ends: 1721 [2022-11-22 01:30:22,948 INFO L226 Difference]: Without dead ends: 1147 [2022-11-22 01:30:22,951 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 01:30:22,952 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 152 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:22,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 261 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:30:22,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-11-22 01:30:22,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2022-11-22 01:30:23,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.4773123909249564) internal successors, (1693), 1146 states have internal predecessors, (1693), 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 01:30:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1693 transitions. [2022-11-22 01:30:23,007 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1693 transitions. Word has length 163 [2022-11-22 01:30:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:23,008 INFO L495 AbstractCegarLoop]: Abstraction has 1147 states and 1693 transitions. [2022-11-22 01:30:23,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 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 01:30:23,008 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1693 transitions. [2022-11-22 01:30:23,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-22 01:30:23,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:23,014 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:30:23,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:30:23,015 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:23,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:23,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1982528506, now seen corresponding path program 1 times [2022-11-22 01:30:23,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:23,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410115461] [2022-11-22 01:30:23,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:23,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:30:23,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:23,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410115461] [2022-11-22 01:30:23,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410115461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:23,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:23,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:30:23,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633719147] [2022-11-22 01:30:23,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:23,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:23,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:23,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:23,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:23,556 INFO L87 Difference]: Start difference. First operand 1147 states and 1693 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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 01:30:24,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:24,651 INFO L93 Difference]: Finished difference Result 3439 states and 5077 transitions. [2022-11-22 01:30:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:24,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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 166 [2022-11-22 01:30:24,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:24,664 INFO L225 Difference]: With dead ends: 3439 [2022-11-22 01:30:24,664 INFO L226 Difference]: Without dead ends: 2293 [2022-11-22 01:30:24,667 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 01:30:24,678 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 157 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:24,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 69 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:30:24,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2022-11-22 01:30:24,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2291. [2022-11-22 01:30:24,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.4026200873362444) internal successors, (3212), 2290 states have internal predecessors, (3212), 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 01:30:24,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3212 transitions. [2022-11-22 01:30:24,767 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3212 transitions. Word has length 166 [2022-11-22 01:30:24,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:24,768 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3212 transitions. [2022-11-22 01:30:24,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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 01:30:24,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3212 transitions. [2022-11-22 01:30:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-22 01:30:24,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:24,779 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 01:30:24,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:30:24,780 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:24,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:24,782 INFO L85 PathProgramCache]: Analyzing trace with hash 610416802, now seen corresponding path program 1 times [2022-11-22 01:30:24,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:24,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844291018] [2022-11-22 01:30:24,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:24,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:25,131 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 01:30:25,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:25,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844291018] [2022-11-22 01:30:25,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844291018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:25,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:25,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:30:25,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339460628] [2022-11-22 01:30:25,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:25,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:25,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:25,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:25,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:25,135 INFO L87 Difference]: Start difference. First operand 2291 states and 3212 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 01:30:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:25,710 INFO L93 Difference]: Finished difference Result 4581 states and 6423 transitions. [2022-11-22 01:30:25,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:25,711 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 01:30:25,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:25,721 INFO L225 Difference]: With dead ends: 4581 [2022-11-22 01:30:25,721 INFO L226 Difference]: Without dead ends: 2291 [2022-11-22 01:30:25,724 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 01:30:25,725 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:25,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:30:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-11-22 01:30:25,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2022-11-22 01:30:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.3624454148471616) internal successors, (3120), 2290 states have internal predecessors, (3120), 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 01:30:25,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3120 transitions. [2022-11-22 01:30:25,794 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3120 transitions. Word has length 176 [2022-11-22 01:30:25,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:25,795 INFO L495 AbstractCegarLoop]: Abstraction has 2291 states and 3120 transitions. [2022-11-22 01:30:25,795 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 01:30:25,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3120 transitions. [2022-11-22 01:30:25,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-22 01:30:25,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:25,803 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:30:25,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:30:25,804 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:25,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:25,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1441048513, now seen corresponding path program 1 times [2022-11-22 01:30:25,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:25,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380377560] [2022-11-22 01:30:25,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:25,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:30:26,718 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:26,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380377560] [2022-11-22 01:30:26,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380377560] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:30:26,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918613095] [2022-11-22 01:30:26,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:26,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:30:26,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:30:26,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:30:26,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:30:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:26,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:30:27,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:30:27,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:30:27,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918613095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:27,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:30:27,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-22 01:30:27,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828412754] [2022-11-22 01:30:27,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:27,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:27,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:27,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:27,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:30:27,405 INFO L87 Difference]: Start difference. First operand 2291 states and 3120 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 01:30:28,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:28,518 INFO L93 Difference]: Finished difference Result 6726 states and 9197 transitions. [2022-11-22 01:30:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:28,519 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 181 [2022-11-22 01:30:28,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:28,537 INFO L225 Difference]: With dead ends: 6726 [2022-11-22 01:30:28,537 INFO L226 Difference]: Without dead ends: 4436 [2022-11-22 01:30:28,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 180 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 01:30:28,542 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:28,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 229 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:30:28,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2022-11-22 01:30:28,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 4436. [2022-11-22 01:30:28,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4436 states, 4435 states have (on average 1.3190529875986472) internal successors, (5850), 4435 states have internal predecessors, (5850), 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 01:30:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4436 states to 4436 states and 5850 transitions. [2022-11-22 01:30:28,663 INFO L78 Accepts]: Start accepts. Automaton has 4436 states and 5850 transitions. Word has length 181 [2022-11-22 01:30:28,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:28,664 INFO L495 AbstractCegarLoop]: Abstraction has 4436 states and 5850 transitions. [2022-11-22 01:30:28,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 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 01:30:28,664 INFO L276 IsEmpty]: Start isEmpty. Operand 4436 states and 5850 transitions. [2022-11-22 01:30:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-22 01:30:28,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:28,675 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 01:30:28,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:30:28,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:30:28,882 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:28,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:28,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1855260923, now seen corresponding path program 1 times [2022-11-22 01:30:28,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:28,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675775542] [2022-11-22 01:30:28,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:28,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 01:30:29,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:29,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675775542] [2022-11-22 01:30:29,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675775542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:29,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:29,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:30:29,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184608867] [2022-11-22 01:30:29,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:29,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:29,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:29,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:29,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:29,736 INFO L87 Difference]: Start difference. First operand 4436 states and 5850 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 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 01:30:30,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:30,734 INFO L93 Difference]: Finished difference Result 10587 states and 13958 transitions. [2022-11-22 01:30:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:30,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 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 195 [2022-11-22 01:30:30,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:30,756 INFO L225 Difference]: With dead ends: 10587 [2022-11-22 01:30:30,757 INFO L226 Difference]: Without dead ends: 6152 [2022-11-22 01:30:30,762 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 01:30:30,763 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 116 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:30,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 75 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:30:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6152 states. [2022-11-22 01:30:30,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6152 to 6152. [2022-11-22 01:30:30,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6152 states, 6151 states have (on average 1.3061290847016744) internal successors, (8034), 6151 states have internal predecessors, (8034), 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 01:30:31,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6152 states to 6152 states and 8034 transitions. [2022-11-22 01:30:31,010 INFO L78 Accepts]: Start accepts. Automaton has 6152 states and 8034 transitions. Word has length 195 [2022-11-22 01:30:31,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:31,010 INFO L495 AbstractCegarLoop]: Abstraction has 6152 states and 8034 transitions. [2022-11-22 01:30:31,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 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 01:30:31,011 INFO L276 IsEmpty]: Start isEmpty. Operand 6152 states and 8034 transitions. [2022-11-22 01:30:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-11-22 01:30:31,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:31,024 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-22 01:30:31,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-22 01:30:31,024 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:31,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:31,025 INFO L85 PathProgramCache]: Analyzing trace with hash 269924618, now seen corresponding path program 2 times [2022-11-22 01:30:31,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:31,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365517154] [2022-11-22 01:30:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:31,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:31,271 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-22 01:30:31,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:31,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365517154] [2022-11-22 01:30:31,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365517154] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:31,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:31,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:30:31,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258881027] [2022-11-22 01:30:31,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:31,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:31,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:31,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:31,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:31,277 INFO L87 Difference]: Start difference. First operand 6152 states and 8034 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 01:30:31,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:31,694 INFO L93 Difference]: Finished difference Result 16595 states and 21726 transitions. [2022-11-22 01:30:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:31,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 202 [2022-11-22 01:30:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:31,757 INFO L225 Difference]: With dead ends: 16595 [2022-11-22 01:30:31,757 INFO L226 Difference]: Without dead ends: 10587 [2022-11-22 01:30:31,765 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 01:30:31,767 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 222 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:31,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 597 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:30:31,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10587 states. [2022-11-22 01:30:32,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10587 to 10585. [2022-11-22 01:30:32,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10585 states, 10584 states have (on average 1.2846749811035525) internal successors, (13597), 10584 states have internal predecessors, (13597), 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 01:30:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10585 states to 10585 states and 13597 transitions. [2022-11-22 01:30:32,179 INFO L78 Accepts]: Start accepts. Automaton has 10585 states and 13597 transitions. Word has length 202 [2022-11-22 01:30:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:32,180 INFO L495 AbstractCegarLoop]: Abstraction has 10585 states and 13597 transitions. [2022-11-22 01:30:32,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 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 01:30:32,181 INFO L276 IsEmpty]: Start isEmpty. Operand 10585 states and 13597 transitions. [2022-11-22 01:30:32,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-22 01:30:32,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:32,210 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:30:32,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:30:32,211 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:32,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:32,212 INFO L85 PathProgramCache]: Analyzing trace with hash -492536979, now seen corresponding path program 3 times [2022-11-22 01:30:32,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:32,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804184749] [2022-11-22 01:30:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:32,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 01:30:32,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:32,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804184749] [2022-11-22 01:30:32,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804184749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:32,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:32,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:30:32,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785068758] [2022-11-22 01:30:32,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:32,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:32,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:32,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:32,561 INFO L87 Difference]: Start difference. First operand 10585 states and 13597 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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 01:30:33,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:33,729 INFO L93 Difference]: Finished difference Result 25173 states and 32524 transitions. [2022-11-22 01:30:33,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:33,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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 209 [2022-11-22 01:30:33,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:33,765 INFO L225 Difference]: With dead ends: 25173 [2022-11-22 01:30:33,765 INFO L226 Difference]: Without dead ends: 14732 [2022-11-22 01:30:33,779 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 01:30:33,782 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 175 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:33,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 231 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:30:33,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14732 states. [2022-11-22 01:30:34,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14732 to 14732. [2022-11-22 01:30:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14732 states, 14731 states have (on average 1.2531396374991515) internal successors, (18460), 14731 states have internal predecessors, (18460), 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 01:30:34,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14732 states to 14732 states and 18460 transitions. [2022-11-22 01:30:34,197 INFO L78 Accepts]: Start accepts. Automaton has 14732 states and 18460 transitions. Word has length 209 [2022-11-22 01:30:34,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:34,198 INFO L495 AbstractCegarLoop]: Abstraction has 14732 states and 18460 transitions. [2022-11-22 01:30:34,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 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 01:30:34,198 INFO L276 IsEmpty]: Start isEmpty. Operand 14732 states and 18460 transitions. [2022-11-22 01:30:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-11-22 01:30:34,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:34,222 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:30:34,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 01:30:34,222 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:34,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:34,223 INFO L85 PathProgramCache]: Analyzing trace with hash -794793850, now seen corresponding path program 1 times [2022-11-22 01:30:34,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:34,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453553312] [2022-11-22 01:30:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:34,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 01:30:34,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:34,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453553312] [2022-11-22 01:30:34,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453553312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:34,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:34,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:30:34,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470314820] [2022-11-22 01:30:34,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:34,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:34,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:34,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:34,526 INFO L87 Difference]: Start difference. First operand 14732 states and 18460 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 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 01:30:35,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:35,706 INFO L93 Difference]: Finished difference Result 34468 states and 44064 transitions. [2022-11-22 01:30:35,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:35,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 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 213 [2022-11-22 01:30:35,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:35,746 INFO L225 Difference]: With dead ends: 34468 [2022-11-22 01:30:35,746 INFO L226 Difference]: Without dead ends: 19737 [2022-11-22 01:30:35,762 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 01:30:35,763 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 110 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:35,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 98 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:30:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19737 states. [2022-11-22 01:30:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19737 to 19737. [2022-11-22 01:30:36,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19737 states, 19736 states have (on average 1.2022192946899068) internal successors, (23727), 19736 states have internal predecessors, (23727), 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 01:30:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19737 states to 19737 states and 23727 transitions. [2022-11-22 01:30:36,148 INFO L78 Accepts]: Start accepts. Automaton has 19737 states and 23727 transitions. Word has length 213 [2022-11-22 01:30:36,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:36,149 INFO L495 AbstractCegarLoop]: Abstraction has 19737 states and 23727 transitions. [2022-11-22 01:30:36,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 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 01:30:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 19737 states and 23727 transitions. [2022-11-22 01:30:36,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-11-22 01:30:36,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:36,177 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-22 01:30:36,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-22 01:30:36,177 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:36,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:36,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1666233959, now seen corresponding path program 1 times [2022-11-22 01:30:36,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:36,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190151934] [2022-11-22 01:30:36,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:36,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 01:30:36,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:36,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190151934] [2022-11-22 01:30:36,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190151934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:36,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:36,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:30:36,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445615137] [2022-11-22 01:30:36,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:36,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:36,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:36,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:36,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:36,669 INFO L87 Difference]: Start difference. First operand 19737 states and 23727 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 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 01:30:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:37,622 INFO L93 Difference]: Finished difference Result 45195 states and 54509 transitions. [2022-11-22 01:30:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:37,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 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 244 [2022-11-22 01:30:37,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:37,773 INFO L225 Difference]: With dead ends: 45195 [2022-11-22 01:30:37,773 INFO L226 Difference]: Without dead ends: 25602 [2022-11-22 01:30:37,796 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 01:30:37,797 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:37,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 97 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:30:37,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25602 states. [2022-11-22 01:30:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25602 to 23741. [2022-11-22 01:30:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23741 states, 23740 states have (on average 1.2157118786857624) internal successors, (28861), 23740 states have internal predecessors, (28861), 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 01:30:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23741 states to 23741 states and 28861 transitions. [2022-11-22 01:30:38,381 INFO L78 Accepts]: Start accepts. Automaton has 23741 states and 28861 transitions. Word has length 244 [2022-11-22 01:30:38,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:38,382 INFO L495 AbstractCegarLoop]: Abstraction has 23741 states and 28861 transitions. [2022-11-22 01:30:38,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 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 01:30:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 23741 states and 28861 transitions. [2022-11-22 01:30:38,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-11-22 01:30:38,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:38,416 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-22 01:30:38,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-22 01:30:38,417 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:38,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:38,417 INFO L85 PathProgramCache]: Analyzing trace with hash 773282991, now seen corresponding path program 1 times [2022-11-22 01:30:38,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:38,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833901648] [2022-11-22 01:30:38,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:38,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-22 01:30:39,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:39,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833901648] [2022-11-22 01:30:39,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833901648] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:39,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:39,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:30:39,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280837935] [2022-11-22 01:30:39,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:39,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:30:39,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:39,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:30:39,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:30:39,027 INFO L87 Difference]: Start difference. First operand 23741 states and 28861 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 01:30:40,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:40,156 INFO L93 Difference]: Finished difference Result 53344 states and 64469 transitions. [2022-11-22 01:30:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:30:40,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 245 [2022-11-22 01:30:40,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:40,227 INFO L225 Difference]: With dead ends: 53344 [2022-11-22 01:30:40,227 INFO L226 Difference]: Without dead ends: 29747 [2022-11-22 01:30:40,244 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 01:30:40,245 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 132 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:40,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 72 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:30:40,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29747 states. [2022-11-22 01:30:40,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29747 to 29747. [2022-11-22 01:30:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29747 states, 29746 states have (on average 1.1973710751025348) internal successors, (35617), 29746 states have internal predecessors, (35617), 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 01:30:40,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29747 states to 29747 states and 35617 transitions. [2022-11-22 01:30:40,917 INFO L78 Accepts]: Start accepts. Automaton has 29747 states and 35617 transitions. Word has length 245 [2022-11-22 01:30:40,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:40,918 INFO L495 AbstractCegarLoop]: Abstraction has 29747 states and 35617 transitions. [2022-11-22 01:30:40,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 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 01:30:40,918 INFO L276 IsEmpty]: Start isEmpty. Operand 29747 states and 35617 transitions. [2022-11-22 01:30:40,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-11-22 01:30:40,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:40,948 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:30:40,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-22 01:30:40,948 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:40,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:40,949 INFO L85 PathProgramCache]: Analyzing trace with hash -959284522, now seen corresponding path program 1 times [2022-11-22 01:30:40,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:40,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830100459] [2022-11-22 01:30:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:40,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:30:41,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:41,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830100459] [2022-11-22 01:30:41,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830100459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:41,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:41,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:30:41,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722761985] [2022-11-22 01:30:41,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:41,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:30:41,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:30:41,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:30:41,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:30:41,444 INFO L87 Difference]: Start difference. First operand 29747 states and 35617 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 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 01:30:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:42,775 INFO L93 Difference]: Finished difference Result 58778 states and 70404 transitions. [2022-11-22 01:30:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:30:42,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 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 01:30:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:42,875 INFO L225 Difference]: With dead ends: 58778 [2022-11-22 01:30:42,876 INFO L226 Difference]: Without dead ends: 29747 [2022-11-22 01:30:42,894 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 01:30:42,895 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 382 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:42,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 11 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:30:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29747 states. [2022-11-22 01:30:43,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29747 to 29747. [2022-11-22 01:30:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29747 states, 29746 states have (on average 1.187689101055604) internal successors, (35329), 29746 states have internal predecessors, (35329), 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 01:30:43,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29747 states to 29747 states and 35329 transitions. [2022-11-22 01:30:43,663 INFO L78 Accepts]: Start accepts. Automaton has 29747 states and 35329 transitions. Word has length 259 [2022-11-22 01:30:43,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:43,663 INFO L495 AbstractCegarLoop]: Abstraction has 29747 states and 35329 transitions. [2022-11-22 01:30:43,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 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 01:30:43,664 INFO L276 IsEmpty]: Start isEmpty. Operand 29747 states and 35329 transitions. [2022-11-22 01:30:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-11-22 01:30:43,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:43,700 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-11-22 01:30:43,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-22 01:30:43,701 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:30:43,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:43,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1400943682, now seen corresponding path program 1 times [2022-11-22 01:30:43,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:30:43,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651889211] [2022-11-22 01:30:43,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:43,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:30:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:30:45,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:30:45,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651889211] [2022-11-22 01:30:45,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651889211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:30:45,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367397618] [2022-11-22 01:30:45,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:45,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:30:45,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:30:45,180 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:30:45,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:30:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:45,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:30:45,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:46,061 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:30:46,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:30:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:30:46,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367397618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:30:46,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1580749065] [2022-11-22 01:30:46,582 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-11-22 01:30:46,582 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:30:46,587 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:30:46,594 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:30:46,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:37:14,222 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 60 [2022-11-22 01:37:14,740 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 23280 conjuctions. This might take some time... [2022-11-22 01:37:15,973 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 288 conjuctions. [2022-11-22 01:37:15,992 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 60 [2022-11-22 01:37:16,393 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 23280 conjuctions. This might take some time... [2022-11-22 01:37:17,571 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 288 conjuctions. [2022-11-22 01:37:18,205 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 60 [2022-11-22 01:37:18,615 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 23280 conjuctions. This might take some time... [2022-11-22 01:37:19,877 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 288 conjuctions. [2022-11-22 01:37:59,807 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:38:30,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1580749065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:30,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:38:30,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 3, 3] total 12 [2022-11-22 01:38:30,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094745114] [2022-11-22 01:38:30,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:30,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:38:30,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:30,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:38:30,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:38:30,264 INFO L87 Difference]: Start difference. First operand 29747 states and 35329 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 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 01:38:37,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:37,474 INFO L93 Difference]: Finished difference Result 59363 states and 70615 transitions. [2022-11-22 01:38:37,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:38:37,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 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 271 [2022-11-22 01:38:37,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:37,528 INFO L225 Difference]: With dead ends: 59363 [2022-11-22 01:38:37,529 INFO L226 Difference]: Without dead ends: 30332 [2022-11-22 01:38:37,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 557 SyntacticMatches, 247 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1507 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-22 01:38:37,554 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 422 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:37,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 101 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-22 01:38:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30332 states. [2022-11-22 01:38:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30332 to 30164. [2022-11-22 01:38:38,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30164 states, 30163 states have (on average 1.189205317773431) internal successors, (35870), 30163 states have internal predecessors, (35870), 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 01:38:38,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30164 states to 30164 states and 35870 transitions. [2022-11-22 01:38:38,122 INFO L78 Accepts]: Start accepts. Automaton has 30164 states and 35870 transitions. Word has length 271 [2022-11-22 01:38:38,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:38,122 INFO L495 AbstractCegarLoop]: Abstraction has 30164 states and 35870 transitions. [2022-11-22 01:38:38,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 6 states have internal predecessors, (146), 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 01:38:38,123 INFO L276 IsEmpty]: Start isEmpty. Operand 30164 states and 35870 transitions. [2022-11-22 01:38:38,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-11-22 01:38:38,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:38,149 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:38:38,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:38,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 01:38:38,357 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:38,357 INFO L85 PathProgramCache]: Analyzing trace with hash 485121680, now seen corresponding path program 1 times [2022-11-22 01:38:38,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:38,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477210361] [2022-11-22 01:38:38,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:38,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 146 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-22 01:38:39,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:39,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477210361] [2022-11-22 01:38:39,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477210361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:38:39,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362152356] [2022-11-22 01:38:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:39,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:39,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:39,239 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:38:39,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:38:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:39,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:38:39,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:39,805 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-22 01:38:39,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:38:39,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362152356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:39,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:38:39,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-22 01:38:39,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144928870] [2022-11-22 01:38:39,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:39,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:38:39,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:39,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:38:39,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:38:39,809 INFO L87 Difference]: Start difference. First operand 30164 states and 35870 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 01:38:40,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:40,918 INFO L93 Difference]: Finished difference Result 63055 states and 75962 transitions. [2022-11-22 01:38:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:38:40,918 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 284 [2022-11-22 01:38:40,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:40,976 INFO L225 Difference]: With dead ends: 63055 [2022-11-22 01:38:40,976 INFO L226 Difference]: Without dead ends: 33761 [2022-11-22 01:38:40,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 283 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 01:38:40,997 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 40 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 187 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 01:38:40,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 187 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:38:41,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33761 states. [2022-11-22 01:38:41,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33761 to 33466. [2022-11-22 01:38:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33466 states, 33465 states have (on average 1.207350963693411) internal successors, (40404), 33465 states have internal predecessors, (40404), 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 01:38:41,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33466 states to 33466 states and 40404 transitions. [2022-11-22 01:38:41,580 INFO L78 Accepts]: Start accepts. Automaton has 33466 states and 40404 transitions. Word has length 284 [2022-11-22 01:38:41,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:41,581 INFO L495 AbstractCegarLoop]: Abstraction has 33466 states and 40404 transitions. [2022-11-22 01:38:41,581 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 01:38:41,581 INFO L276 IsEmpty]: Start isEmpty. Operand 33466 states and 40404 transitions. [2022-11-22 01:38:41,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-11-22 01:38:41,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:41,609 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 01:38:41,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:41,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 01:38:41,817 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:41,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:41,818 INFO L85 PathProgramCache]: Analyzing trace with hash -207092175, now seen corresponding path program 1 times [2022-11-22 01:38:41,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:41,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317026863] [2022-11-22 01:38:41,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:41,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:42,359 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 01:38:42,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:42,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317026863] [2022-11-22 01:38:42,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317026863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:42,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:38:42,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:38:42,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883875477] [2022-11-22 01:38:42,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:42,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:38:42,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:42,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:38:42,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:38:42,363 INFO L87 Difference]: Start difference. First operand 33466 states and 40404 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 01:38:43,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:43,555 INFO L93 Difference]: Finished difference Result 72221 states and 87363 transitions. [2022-11-22 01:38:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:38:43,555 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 01:38:43,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:43,608 INFO L225 Difference]: With dead ends: 72221 [2022-11-22 01:38:43,608 INFO L226 Difference]: Without dead ends: 39758 [2022-11-22 01:38:43,632 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 01:38:43,633 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 14 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:43,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 235 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:38:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39758 states. [2022-11-22 01:38:44,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39758 to 38757. [2022-11-22 01:38:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38757 states, 38756 states have (on average 1.1955052120961915) internal successors, (46333), 38756 states have internal predecessors, (46333), 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 01:38:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38757 states to 38757 states and 46333 transitions. [2022-11-22 01:38:44,230 INFO L78 Accepts]: Start accepts. Automaton has 38757 states and 46333 transitions. Word has length 292 [2022-11-22 01:38:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:44,231 INFO L495 AbstractCegarLoop]: Abstraction has 38757 states and 46333 transitions. [2022-11-22 01:38:44,231 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 01:38:44,231 INFO L276 IsEmpty]: Start isEmpty. Operand 38757 states and 46333 transitions. [2022-11-22 01:38:44,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-11-22 01:38:44,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:44,264 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 01:38:44,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-22 01:38:44,265 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:44,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:44,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1523555318, now seen corresponding path program 1 times [2022-11-22 01:38:44,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:44,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769252986] [2022-11-22 01:38:44,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:44,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:44,914 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 01:38:44,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:44,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769252986] [2022-11-22 01:38:44,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769252986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:44,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:38:44,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:38:44,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802581818] [2022-11-22 01:38:44,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:44,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:38:44,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:44,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:38:44,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:38:44,918 INFO L87 Difference]: Start difference. First operand 38757 states and 46333 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 01:38:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:46,498 INFO L93 Difference]: Finished difference Result 76797 states and 91780 transitions. [2022-11-22 01:38:46,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:38:46,499 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 01:38:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:46,546 INFO L225 Difference]: With dead ends: 76797 [2022-11-22 01:38:46,546 INFO L226 Difference]: Without dead ends: 39043 [2022-11-22 01:38:46,570 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 01:38:46,570 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 134 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:46,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 44 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 01:38:46,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39043 states. [2022-11-22 01:38:47,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39043 to 37899. [2022-11-22 01:38:47,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37899 states, 37898 states have (on average 1.1965802944746424) internal successors, (45348), 37898 states have internal predecessors, (45348), 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 01:38:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37899 states to 37899 states and 45348 transitions. [2022-11-22 01:38:47,111 INFO L78 Accepts]: Start accepts. Automaton has 37899 states and 45348 transitions. Word has length 308 [2022-11-22 01:38:47,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:47,112 INFO L495 AbstractCegarLoop]: Abstraction has 37899 states and 45348 transitions. [2022-11-22 01:38:47,112 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 01:38:47,112 INFO L276 IsEmpty]: Start isEmpty. Operand 37899 states and 45348 transitions. [2022-11-22 01:38:47,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-11-22 01:38:47,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:47,136 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 01:38:47,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-22 01:38:47,137 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:47,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:47,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1254490257, now seen corresponding path program 1 times [2022-11-22 01:38:47,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:47,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925439611] [2022-11-22 01:38:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:47,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:47,656 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 01:38:47,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:47,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925439611] [2022-11-22 01:38:47,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925439611] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:38:47,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046913570] [2022-11-22 01:38:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:47,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:47,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:47,663 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:38:47,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:38:47,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:47,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:38:47,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-22 01:38:48,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:38:48,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046913570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:48,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:38:48,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-22 01:38:48,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661993634] [2022-11-22 01:38:48,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:48,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:38:48,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:48,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:38:48,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:38:48,140 INFO L87 Difference]: Start difference. First operand 37899 states and 45348 transitions. Second operand has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 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 01:38:49,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:49,560 INFO L93 Difference]: Finished difference Result 81057 states and 96829 transitions. [2022-11-22 01:38:49,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:38:49,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 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 01:38:49,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:49,605 INFO L225 Difference]: With dead ends: 81057 [2022-11-22 01:38:49,605 INFO L226 Difference]: Without dead ends: 43335 [2022-11-22 01:38:49,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:38:49,625 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 384 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:49,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 224 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:38:49,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43335 states. [2022-11-22 01:38:50,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43335 to 42046. [2022-11-22 01:38:50,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42046 states, 42045 states have (on average 1.1851111903912475) internal successors, (49828), 42045 states have internal predecessors, (49828), 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 01:38:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42046 states to 42046 states and 49828 transitions. [2022-11-22 01:38:50,369 INFO L78 Accepts]: Start accepts. Automaton has 42046 states and 49828 transitions. Word has length 315 [2022-11-22 01:38:50,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:50,369 INFO L495 AbstractCegarLoop]: Abstraction has 42046 states and 49828 transitions. [2022-11-22 01:38:50,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.5) internal successors, (182), 3 states have internal predecessors, (182), 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 01:38:50,370 INFO L276 IsEmpty]: Start isEmpty. Operand 42046 states and 49828 transitions. [2022-11-22 01:38:50,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-11-22 01:38:50,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:50,398 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-22 01:38:50,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:50,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 01:38:50,600 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:50,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:50,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1725265779, now seen corresponding path program 1 times [2022-11-22 01:38:50,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:50,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103566425] [2022-11-22 01:38:50,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:50,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:51,572 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-22 01:38:51,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:51,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103566425] [2022-11-22 01:38:51,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103566425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:51,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:38:51,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:38:51,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654492107] [2022-11-22 01:38:51,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:51,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:38:51,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:51,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:38:51,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:38:51,576 INFO L87 Difference]: Start difference. First operand 42046 states and 49828 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 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 01:38:52,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:52,613 INFO L93 Difference]: Finished difference Result 83232 states and 98648 transitions. [2022-11-22 01:38:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:38:52,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 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 345 [2022-11-22 01:38:52,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:52,673 INFO L225 Difference]: With dead ends: 83232 [2022-11-22 01:38:52,673 INFO L226 Difference]: Without dead ends: 42189 [2022-11-22 01:38:52,696 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 01:38:52,697 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 72 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:52,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 99 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:38:52,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42189 states. [2022-11-22 01:38:53,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42189 to 42189. [2022-11-22 01:38:53,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42189 states, 42188 states have (on average 1.184791883948042) internal successors, (49984), 42188 states have internal predecessors, (49984), 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 01:38:53,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42189 states to 42189 states and 49984 transitions. [2022-11-22 01:38:53,270 INFO L78 Accepts]: Start accepts. Automaton has 42189 states and 49984 transitions. Word has length 345 [2022-11-22 01:38:53,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:53,270 INFO L495 AbstractCegarLoop]: Abstraction has 42189 states and 49984 transitions. [2022-11-22 01:38:53,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 2 states have internal predecessors, (219), 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 01:38:53,271 INFO L276 IsEmpty]: Start isEmpty. Operand 42189 states and 49984 transitions. [2022-11-22 01:38:53,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2022-11-22 01:38:53,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:53,299 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 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, 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 01:38:53,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-22 01:38:53,300 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:53,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:53,300 INFO L85 PathProgramCache]: Analyzing trace with hash 829786860, now seen corresponding path program 1 times [2022-11-22 01:38:53,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:53,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681857949] [2022-11-22 01:38:53,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:53,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:38:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 198 proven. 3 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-22 01:38:54,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:38:54,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681857949] [2022-11-22 01:38:54,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681857949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:38:54,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385941639] [2022-11-22 01:38:54,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:54,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:54,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:38:54,385 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:38:54,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:38:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:38:54,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:38:54,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:38:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 322 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:38:57,890 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:38:57,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385941639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:38:57,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:38:57,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-22 01:38:57,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160798050] [2022-11-22 01:38:57,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:38:57,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:38:57,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:38:57,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:38:57,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:38:57,893 INFO L87 Difference]: Start difference. First operand 42189 states and 49984 transitions. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 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 01:38:59,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:38:59,048 INFO L93 Difference]: Finished difference Result 84090 states and 99631 transitions. [2022-11-22 01:38:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:38:59,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 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 367 [2022-11-22 01:38:59,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:38:59,092 INFO L225 Difference]: With dead ends: 84090 [2022-11-22 01:38:59,093 INFO L226 Difference]: Without dead ends: 43047 [2022-11-22 01:38:59,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 366 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 01:38:59,112 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 23 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:38:59,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 249 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:38:59,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43047 states. [2022-11-22 01:38:59,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43047 to 43047. [2022-11-22 01:38:59,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43047 states, 43046 states have (on average 1.1813641221019375) internal successors, (50853), 43046 states have internal predecessors, (50853), 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 01:38:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43047 states to 43047 states and 50853 transitions. [2022-11-22 01:38:59,695 INFO L78 Accepts]: Start accepts. Automaton has 43047 states and 50853 transitions. Word has length 367 [2022-11-22 01:38:59,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:38:59,695 INFO L495 AbstractCegarLoop]: Abstraction has 43047 states and 50853 transitions. [2022-11-22 01:38:59,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 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 01:38:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand 43047 states and 50853 transitions. [2022-11-22 01:38:59,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2022-11-22 01:38:59,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:38:59,726 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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, 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, 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, 1, 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 01:38:59,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:38:59,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:38:59,927 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:38:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:38:59,928 INFO L85 PathProgramCache]: Analyzing trace with hash 326174032, now seen corresponding path program 1 times [2022-11-22 01:38:59,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:38:59,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271756803] [2022-11-22 01:38:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:38:59,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 207 proven. 3 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-22 01:39:00,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:00,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271756803] [2022-11-22 01:39:00,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271756803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:00,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152508231] [2022-11-22 01:39:00,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:00,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:00,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:00,874 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:00,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:39:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:01,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:39:01,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 210 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-22 01:39:01,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:01,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152508231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:01,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:01,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-22 01:39:01,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883131953] [2022-11-22 01:39:01,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:01,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:39:01,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:01,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:39:01,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:39:01,332 INFO L87 Difference]: Start difference. First operand 43047 states and 50853 transitions. Second operand has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 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 01:39:02,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:02,856 INFO L93 Difference]: Finished difference Result 88952 states and 105255 transitions. [2022-11-22 01:39:02,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:39:02,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 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 373 [2022-11-22 01:39:02,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:02,903 INFO L225 Difference]: With dead ends: 88952 [2022-11-22 01:39:02,904 INFO L226 Difference]: Without dead ends: 47051 [2022-11-22 01:39:02,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:39:02,925 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 250 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:02,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 77 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-22 01:39:02,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47051 states. [2022-11-22 01:39:03,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47051 to 45907. [2022-11-22 01:39:03,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45907 states, 45906 states have (on average 1.1592820110660915) internal successors, (53218), 45906 states have internal predecessors, (53218), 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 01:39:03,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45907 states to 45907 states and 53218 transitions. [2022-11-22 01:39:03,543 INFO L78 Accepts]: Start accepts. Automaton has 45907 states and 53218 transitions. Word has length 373 [2022-11-22 01:39:03,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:03,544 INFO L495 AbstractCegarLoop]: Abstraction has 45907 states and 53218 transitions. [2022-11-22 01:39:03,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.25) internal successors, (245), 3 states have internal predecessors, (245), 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 01:39:03,544 INFO L276 IsEmpty]: Start isEmpty. Operand 45907 states and 53218 transitions. [2022-11-22 01:39:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2022-11-22 01:39:03,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:03,576 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:03,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:03,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-22 01:39:03,777 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:03,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1720742237, now seen corresponding path program 1 times [2022-11-22 01:39:03,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:03,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554323784] [2022-11-22 01:39:03,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:03,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 258 proven. 6 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-22 01:39:05,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:05,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554323784] [2022-11-22 01:39:05,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554323784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:05,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490408334] [2022-11-22 01:39:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:05,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:05,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:05,522 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:05,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:39:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:05,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:39:05,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-22 01:39:06,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:06,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490408334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:06,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:06,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-22 01:39:06,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993793196] [2022-11-22 01:39:06,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:06,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:39:06,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:06,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:39:06,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:39:06,449 INFO L87 Difference]: Start difference. First operand 45907 states and 53218 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:07,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:07,638 INFO L93 Difference]: Finished difference Result 93385 states and 108318 transitions. [2022-11-22 01:39:07,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:39:07,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 390 [2022-11-22 01:39:07,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:07,691 INFO L225 Difference]: With dead ends: 93385 [2022-11-22 01:39:07,691 INFO L226 Difference]: Without dead ends: 48624 [2022-11-22 01:39:07,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 389 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:39:07,714 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:07,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 255 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:39:07,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48624 states. [2022-11-22 01:39:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48624 to 44048. [2022-11-22 01:39:08,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44048 states, 44047 states have (on average 1.1597838672327287) internal successors, (51085), 44047 states have internal predecessors, (51085), 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 01:39:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44048 states to 44048 states and 51085 transitions. [2022-11-22 01:39:08,347 INFO L78 Accepts]: Start accepts. Automaton has 44048 states and 51085 transitions. Word has length 390 [2022-11-22 01:39:08,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:08,347 INFO L495 AbstractCegarLoop]: Abstraction has 44048 states and 51085 transitions. [2022-11-22 01:39:08,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:39:08,348 INFO L276 IsEmpty]: Start isEmpty. Operand 44048 states and 51085 transitions. [2022-11-22 01:39:08,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-11-22 01:39:08,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:08,376 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, 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:08,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:08,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:08,578 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:08,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:08,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1852143021, now seen corresponding path program 1 times [2022-11-22 01:39:08,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:08,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087869193] [2022-11-22 01:39:08,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:08,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 228 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-22 01:39:08,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:08,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087869193] [2022-11-22 01:39:08,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087869193] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:08,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:08,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:39:08,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541346730] [2022-11-22 01:39:08,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:08,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:39:08,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:08,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:39:08,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:39:08,998 INFO L87 Difference]: Start difference. First operand 44048 states and 51085 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 2 states have internal predecessors, (259), 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 01:39:10,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:10,383 INFO L93 Difference]: Finished difference Result 104968 states and 121260 transitions. [2022-11-22 01:39:10,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:39:10,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 2 states have internal predecessors, (259), 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 392 [2022-11-22 01:39:10,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:10,450 INFO L225 Difference]: With dead ends: 104968 [2022-11-22 01:39:10,450 INFO L226 Difference]: Without dead ends: 62066 [2022-11-22 01:39:10,471 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 01:39:10,471 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 46 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:10,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 83 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 01:39:10,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62066 states. [2022-11-22 01:39:11,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62066 to 57633. [2022-11-22 01:39:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57633 states, 57632 states have (on average 1.158800666296502) internal successors, (66784), 57632 states have internal predecessors, (66784), 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 01:39:11,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57633 states to 57633 states and 66784 transitions. [2022-11-22 01:39:11,301 INFO L78 Accepts]: Start accepts. Automaton has 57633 states and 66784 transitions. Word has length 392 [2022-11-22 01:39:11,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:11,301 INFO L495 AbstractCegarLoop]: Abstraction has 57633 states and 66784 transitions. [2022-11-22 01:39:11,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 2 states have internal predecessors, (259), 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 01:39:11,302 INFO L276 IsEmpty]: Start isEmpty. Operand 57633 states and 66784 transitions. [2022-11-22 01:39:11,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-11-22 01:39:11,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:11,337 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, 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, 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, 3, 3, 3, 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] [2022-11-22 01:39:11,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-22 01:39:11,338 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:11,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:11,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1648314268, now seen corresponding path program 1 times [2022-11-22 01:39:11,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:11,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857838873] [2022-11-22 01:39:11,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:11,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:39:12,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:12,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857838873] [2022-11-22 01:39:12,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857838873] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:12,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:12,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:39:12,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349498173] [2022-11-22 01:39:12,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:12,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:39:12,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:12,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:39:12,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:39:12,097 INFO L87 Difference]: Start difference. First operand 57633 states and 66784 transitions. Second operand has 4 states, 4 states have (on average 97.5) internal successors, (390), 3 states have internal predecessors, (390), 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 01:39:13,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:13,932 INFO L93 Difference]: Finished difference Result 112690 states and 130509 transitions. [2022-11-22 01:39:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:39:13,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 97.5) internal successors, (390), 3 states have internal predecessors, (390), 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 395 [2022-11-22 01:39:13,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:14,018 INFO L225 Difference]: With dead ends: 112690 [2022-11-22 01:39:14,018 INFO L226 Difference]: Without dead ends: 56203 [2022-11-22 01:39:14,032 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 01:39:14,033 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 74 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:14,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 10 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:39:14,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56203 states. [2022-11-22 01:39:15,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56203 to 52771. [2022-11-22 01:39:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52771 states, 52770 states have (on average 1.1480197081675194) internal successors, (60581), 52770 states have internal predecessors, (60581), 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 01:39:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52771 states to 52771 states and 60581 transitions. [2022-11-22 01:39:15,331 INFO L78 Accepts]: Start accepts. Automaton has 52771 states and 60581 transitions. Word has length 395 [2022-11-22 01:39:15,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:15,331 INFO L495 AbstractCegarLoop]: Abstraction has 52771 states and 60581 transitions. [2022-11-22 01:39:15,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.5) internal successors, (390), 3 states have internal predecessors, (390), 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 01:39:15,331 INFO L276 IsEmpty]: Start isEmpty. Operand 52771 states and 60581 transitions. [2022-11-22 01:39:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-11-22 01:39:15,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:15,362 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:39:15,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-22 01:39:15,362 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:15,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:15,363 INFO L85 PathProgramCache]: Analyzing trace with hash 675387901, now seen corresponding path program 1 times [2022-11-22 01:39:15,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:15,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341264670] [2022-11-22 01:39:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:15,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 311 proven. 29 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-22 01:39:16,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:16,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341264670] [2022-11-22 01:39:16,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341264670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:16,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357708269] [2022-11-22 01:39:16,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:16,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:16,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:16,204 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:16,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:39:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:16,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:39:16,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-11-22 01:39:16,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:16,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357708269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:16,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:16,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-22 01:39:16,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212538440] [2022-11-22 01:39:16,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:16,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:39:16,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:16,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:39:16,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:39:16,559 INFO L87 Difference]: Start difference. First operand 52771 states and 60581 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 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 01:39:17,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:17,936 INFO L93 Difference]: Finished difference Result 105683 states and 121424 transitions. [2022-11-22 01:39:17,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:39:17,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 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 397 [2022-11-22 01:39:17,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:18,000 INFO L225 Difference]: With dead ends: 105683 [2022-11-22 01:39:18,000 INFO L226 Difference]: Without dead ends: 52056 [2022-11-22 01:39:18,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 396 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 01:39:18,026 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 140 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:18,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 224 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:39:18,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52056 states. [2022-11-22 01:39:18,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52056 to 44191. [2022-11-22 01:39:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44191 states, 44190 states have (on average 1.1348721430187825) internal successors, (50150), 44190 states have internal predecessors, (50150), 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 01:39:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44191 states to 44191 states and 50150 transitions. [2022-11-22 01:39:19,065 INFO L78 Accepts]: Start accepts. Automaton has 44191 states and 50150 transitions. Word has length 397 [2022-11-22 01:39:19,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:19,065 INFO L495 AbstractCegarLoop]: Abstraction has 44191 states and 50150 transitions. [2022-11-22 01:39:19,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 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 01:39:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 44191 states and 50150 transitions. [2022-11-22 01:39:19,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2022-11-22 01:39:19,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:19,110 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, 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, 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:19,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:19,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-22 01:39:19,312 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:19,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:19,313 INFO L85 PathProgramCache]: Analyzing trace with hash -243451026, now seen corresponding path program 1 times [2022-11-22 01:39:19,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:19,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221822847] [2022-11-22 01:39:19,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:19,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 242 proven. 6 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-22 01:39:21,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:21,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221822847] [2022-11-22 01:39:21,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221822847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:21,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747212276] [2022-11-22 01:39:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:21,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:21,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:21,360 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:21,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:39:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:21,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:39:21,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 248 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-22 01:39:22,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:22,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747212276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:22,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:22,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-11-22 01:39:22,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123443283] [2022-11-22 01:39:22,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:22,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:39:22,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:22,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:39:22,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:39:22,255 INFO L87 Difference]: Start difference. First operand 44191 states and 50150 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 3 states have internal predecessors, (266), 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 01:39:23,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:23,660 INFO L93 Difference]: Finished difference Result 88952 states and 100827 transitions. [2022-11-22 01:39:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:39:23,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 3 states have internal predecessors, (266), 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 399 [2022-11-22 01:39:23,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:23,709 INFO L225 Difference]: With dead ends: 88952 [2022-11-22 01:39:23,709 INFO L226 Difference]: Without dead ends: 45478 [2022-11-22 01:39:23,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:39:23,721 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 446 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:23,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 158 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:39:23,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45478 states. [2022-11-22 01:39:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45478 to 41331. [2022-11-22 01:39:24,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41331 states, 41330 states have (on average 1.1398257924026132) internal successors, (47109), 41330 states have internal predecessors, (47109), 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 01:39:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41331 states to 41331 states and 47109 transitions. [2022-11-22 01:39:24,644 INFO L78 Accepts]: Start accepts. Automaton has 41331 states and 47109 transitions. Word has length 399 [2022-11-22 01:39:24,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:24,644 INFO L495 AbstractCegarLoop]: Abstraction has 41331 states and 47109 transitions. [2022-11-22 01:39:24,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 3 states have internal predecessors, (266), 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 01:39:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 41331 states and 47109 transitions. [2022-11-22 01:39:24,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2022-11-22 01:39:24,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:24,689 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-22 01:39:24,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:24,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-22 01:39:24,904 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:24,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:24,904 INFO L85 PathProgramCache]: Analyzing trace with hash 47701645, now seen corresponding path program 1 times [2022-11-22 01:39:24,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:24,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511947439] [2022-11-22 01:39:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:24,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 426 proven. 18 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-11-22 01:39:25,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:25,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511947439] [2022-11-22 01:39:25,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511947439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:25,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847626777] [2022-11-22 01:39:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:25,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:25,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:25,737 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:25,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:39:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:26,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:39:26,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 432 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-22 01:39:26,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:26,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847626777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:26,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:26,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-22 01:39:26,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652121618] [2022-11-22 01:39:26,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:26,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:39:26,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:26,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:39:26,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:39:26,199 INFO L87 Difference]: Start difference. First operand 41331 states and 47109 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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 01:39:27,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:27,548 INFO L93 Difference]: Finished difference Result 93816 states and 107076 transitions. [2022-11-22 01:39:27,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:39:27,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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 418 [2022-11-22 01:39:27,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:27,606 INFO L225 Difference]: With dead ends: 93816 [2022-11-22 01:39:27,606 INFO L226 Difference]: Without dead ends: 53488 [2022-11-22 01:39:27,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:39:27,624 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 124 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:27,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 77 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:39:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53488 states. [2022-11-22 01:39:28,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53488 to 50340. [2022-11-22 01:39:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50340 states, 50339 states have (on average 1.1212578716303463) internal successors, (56443), 50339 states have internal predecessors, (56443), 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 01:39:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50340 states to 50340 states and 56443 transitions. [2022-11-22 01:39:28,493 INFO L78 Accepts]: Start accepts. Automaton has 50340 states and 56443 transitions. Word has length 418 [2022-11-22 01:39:28,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:28,494 INFO L495 AbstractCegarLoop]: Abstraction has 50340 states and 56443 transitions. [2022-11-22 01:39:28,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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 01:39:28,494 INFO L276 IsEmpty]: Start isEmpty. Operand 50340 states and 56443 transitions. [2022-11-22 01:39:28,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-11-22 01:39:28,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:28,525 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 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 01:39:28,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:28,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-22 01:39:28,726 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:28,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:28,726 INFO L85 PathProgramCache]: Analyzing trace with hash -146198733, now seen corresponding path program 1 times [2022-11-22 01:39:28,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:28,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354510237] [2022-11-22 01:39:28,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:28,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 453 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-22 01:39:29,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:29,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354510237] [2022-11-22 01:39:29,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354510237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:29,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:39:29,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:39:29,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236539424] [2022-11-22 01:39:29,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:29,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:39:29,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:29,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:39:29,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:39:29,348 INFO L87 Difference]: Start difference. First operand 50340 states and 56443 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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 01:39:30,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:30,830 INFO L93 Difference]: Finished difference Result 100106 states and 112330 transitions. [2022-11-22 01:39:30,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:39:30,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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 425 [2022-11-22 01:39:30,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:30,895 INFO L225 Difference]: With dead ends: 100106 [2022-11-22 01:39:30,895 INFO L226 Difference]: Without dead ends: 50912 [2022-11-22 01:39:30,923 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 01:39:30,924 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 114 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:30,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 76 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:39:30,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50912 states. [2022-11-22 01:39:31,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50912 to 38757. [2022-11-22 01:39:31,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38757 states, 38756 states have (on average 1.1128341418103003) internal successors, (43129), 38756 states have internal predecessors, (43129), 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 01:39:32,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38757 states to 38757 states and 43129 transitions. [2022-11-22 01:39:32,039 INFO L78 Accepts]: Start accepts. Automaton has 38757 states and 43129 transitions. Word has length 425 [2022-11-22 01:39:32,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:32,039 INFO L495 AbstractCegarLoop]: Abstraction has 38757 states and 43129 transitions. [2022-11-22 01:39:32,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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 01:39:32,040 INFO L276 IsEmpty]: Start isEmpty. Operand 38757 states and 43129 transitions. [2022-11-22 01:39:32,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2022-11-22 01:39:32,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:32,067 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 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 01:39:32,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-22 01:39:32,068 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:32,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:32,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1563875479, now seen corresponding path program 1 times [2022-11-22 01:39:32,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:32,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250671337] [2022-11-22 01:39:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:32,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 375 proven. 90 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-22 01:39:32,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:32,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250671337] [2022-11-22 01:39:32,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250671337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:32,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655393268] [2022-11-22 01:39:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:32,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:32,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:32,472 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:32,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 01:39:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:32,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:39:32,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:33,181 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 501 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-22 01:39:33,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:33,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655393268] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:33,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:33,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-11-22 01:39:33,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764498052] [2022-11-22 01:39:33,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:33,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:39:33,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:33,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:39:33,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:39:33,184 INFO L87 Difference]: Start difference. First operand 38757 states and 43129 transitions. Second operand has 4 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 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 01:39:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:34,781 INFO L93 Difference]: Finished difference Result 86809 states and 96320 transitions. [2022-11-22 01:39:34,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:39:34,781 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 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 429 [2022-11-22 01:39:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:34,826 INFO L225 Difference]: With dead ends: 86809 [2022-11-22 01:39:34,826 INFO L226 Difference]: Without dead ends: 49055 [2022-11-22 01:39:34,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:39:34,847 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 326 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:34,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 207 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 01:39:34,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49055 states. [2022-11-22 01:39:35,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49055 to 45335. [2022-11-22 01:39:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45335 states, 45334 states have (on average 1.109630740724401) internal successors, (50304), 45334 states have internal predecessors, (50304), 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 01:39:35,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45335 states to 45335 states and 50304 transitions. [2022-11-22 01:39:35,766 INFO L78 Accepts]: Start accepts. Automaton has 45335 states and 50304 transitions. Word has length 429 [2022-11-22 01:39:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:35,767 INFO L495 AbstractCegarLoop]: Abstraction has 45335 states and 50304 transitions. [2022-11-22 01:39:35,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.75) internal successors, (351), 4 states have internal predecessors, (351), 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 01:39:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 45335 states and 50304 transitions. [2022-11-22 01:39:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2022-11-22 01:39:35,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:35,807 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, 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, 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, 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, 1, 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 01:39:35,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:36,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-22 01:39:36,008 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:36,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:36,009 INFO L85 PathProgramCache]: Analyzing trace with hash -2142441087, now seen corresponding path program 1 times [2022-11-22 01:39:36,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:36,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089676107] [2022-11-22 01:39:36,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:36,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 364 proven. 67 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-22 01:39:38,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:38,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089676107] [2022-11-22 01:39:38,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089676107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:38,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499794815] [2022-11-22 01:39:38,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:38,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:38,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:38,316 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:38,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 01:39:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:38,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:39:38,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 425 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-11-22 01:39:39,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:39,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499794815] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:39,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:39,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-11-22 01:39:39,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163557535] [2022-11-22 01:39:39,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:39,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:39:39,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:39,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:39:39,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:39:39,723 INFO L87 Difference]: Start difference. First operand 45335 states and 50304 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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 01:39:41,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:41,024 INFO L93 Difference]: Finished difference Result 92384 states and 102314 transitions. [2022-11-22 01:39:41,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:39:41,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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 450 [2022-11-22 01:39:41,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:41,071 INFO L225 Difference]: With dead ends: 92384 [2022-11-22 01:39:41,071 INFO L226 Difference]: Without dead ends: 47909 [2022-11-22 01:39:41,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:39:41,091 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 89 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:41,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 237 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:39:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47909 states. [2022-11-22 01:39:41,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47909 to 46908. [2022-11-22 01:39:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46908 states, 46907 states have (on average 1.1055066407998806) internal successors, (51856), 46907 states have internal predecessors, (51856), 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 01:39:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46908 states to 46908 states and 51856 transitions. [2022-11-22 01:39:41,990 INFO L78 Accepts]: Start accepts. Automaton has 46908 states and 51856 transitions. Word has length 450 [2022-11-22 01:39:41,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:41,991 INFO L495 AbstractCegarLoop]: Abstraction has 46908 states and 51856 transitions. [2022-11-22 01:39:41,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 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 01:39:41,991 INFO L276 IsEmpty]: Start isEmpty. Operand 46908 states and 51856 transitions. [2022-11-22 01:39:42,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2022-11-22 01:39:42,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:42,022 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:42,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:42,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:42,223 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:42,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1563366160, now seen corresponding path program 1 times [2022-11-22 01:39:42,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:42,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118192025] [2022-11-22 01:39:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:42,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 367 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:39:43,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:43,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118192025] [2022-11-22 01:39:43,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118192025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:43,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744459266] [2022-11-22 01:39:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:43,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:43,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:43,814 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:43,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 01:39:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:44,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:39:44,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 559 backedges. 553 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:39:44,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:39:44,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744459266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:39:44,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:39:44,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-11-22 01:39:44,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115844628] [2022-11-22 01:39:44,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:39:44,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:39:44,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:39:44,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:39:44,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:39:44,936 INFO L87 Difference]: Start difference. First operand 46908 states and 51856 transitions. Second operand has 4 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 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 01:39:46,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:39:46,656 INFO L93 Difference]: Finished difference Result 93528 states and 103372 transitions. [2022-11-22 01:39:46,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:39:46,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 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 458 [2022-11-22 01:39:46,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:39:46,708 INFO L225 Difference]: With dead ends: 93528 [2022-11-22 01:39:46,708 INFO L226 Difference]: Without dead ends: 47766 [2022-11-22 01:39:46,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:39:46,732 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:39:46,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 35 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 01:39:46,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47766 states. [2022-11-22 01:39:47,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47766 to 46336. [2022-11-22 01:39:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46336 states, 46335 states have (on average 1.1055141901370453) internal successors, (51224), 46335 states have internal predecessors, (51224), 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 01:39:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46336 states to 46336 states and 51224 transitions. [2022-11-22 01:39:47,626 INFO L78 Accepts]: Start accepts. Automaton has 46336 states and 51224 transitions. Word has length 458 [2022-11-22 01:39:47,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:39:47,627 INFO L495 AbstractCegarLoop]: Abstraction has 46336 states and 51224 transitions. [2022-11-22 01:39:47,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 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 01:39:47,627 INFO L276 IsEmpty]: Start isEmpty. Operand 46336 states and 51224 transitions. [2022-11-22 01:39:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2022-11-22 01:39:47,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:39:47,657 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:39:47,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 01:39:47,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-22 01:39:47,864 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 01:39:47,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:39:47,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1037234962, now seen corresponding path program 1 times [2022-11-22 01:39:47,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:39:47,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060761087] [2022-11-22 01:39:47,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:47,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:39:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 386 proven. 67 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-11-22 01:39:49,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:39:49,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060761087] [2022-11-22 01:39:49,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060761087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:39:49,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239358991] [2022-11-22 01:39:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:39:49,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:39:49,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:39:49,996 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:39:49,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e9dcbe8f-21ca-4080-a630-96cadf68b0e9/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 01:39:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:39:50,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:39:50,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:39:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 516 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:39:51,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:39:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 516 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:39:53,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239358991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:39:53,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1941463694] [2022-11-22 01:39:53,287 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2022-11-22 01:39:53,287 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:39:53,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:39:53,288 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:39:53,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs