./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh --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 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 --- 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-2329fc7 [2022-12-14 07:19:33,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:19:33,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:19:34,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:19:34,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:19:34,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:19:34,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:19:34,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:19:34,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:19:34,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:19:34,010 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:19:34,011 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:19:34,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:19:34,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:19:34,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:19:34,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:19:34,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:19:34,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:19:34,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:19:34,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:19:34,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:19:34,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:19:34,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:19:34,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:19:34,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:19:34,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:19:34,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:19:34,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:19:34,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:19:34,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:19:34,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:19:34,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:19:34,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:19:34,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:19:34,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:19:34,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:19:34,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:19:34,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:19:34,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:19:34,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:19:34,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:19:34,036 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:19:34,055 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:19:34,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:19:34,055 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:19:34,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:19:34,056 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:19:34,056 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:19:34,056 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:19:34,057 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:19:34,057 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:19:34,057 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:19:34,057 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:19:34,057 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:19:34,057 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:19:34,058 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:19:34,058 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:19:34,058 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:19:34,058 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:19:34,058 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:19:34,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:19:34,059 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:19:34,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:19:34,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:19:34,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:19:34,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:19:34,060 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:19:34,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:19:34,060 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:19:34,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:19:34,060 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:19:34,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:19:34,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:19:34,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:19:34,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:19:34,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:19:34,061 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:19:34,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:19:34,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:19:34,062 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:19:34,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:19:34,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:19:34,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:19:34,062 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_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 10f09c8c5639b403d441157c6cb90f176690981c36f4af5417d0103735cbe364 [2022-12-14 07:19:34,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:19:34,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:19:34,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:19:34,277 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:19:34,278 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:19:34,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2022-12-14 07:19:36,960 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:19:37,202 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:19:37,202 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c [2022-12-14 07:19:37,214 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/data/2da1c3b20/6d96602e6af749dcbb00a33455c1e1ad/FLAG50f4fe373 [2022-12-14 07:19:37,225 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/data/2da1c3b20/6d96602e6af749dcbb00a33455c1e1ad [2022-12-14 07:19:37,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:19:37,228 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:19:37,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:19:37,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:19:37,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:19:37,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:19:37" (1/1) ... [2022-12-14 07:19:37,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ac9bfe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:37, skipping insertion in model container [2022-12-14 07:19:37,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:19:37" (1/1) ... [2022-12-14 07:19:37,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:19:37,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:19:37,404 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_d1f3b431-84c3-44d8-becd-121236957fce/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c[3205,3218] [2022-12-14 07:19:37,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:19:37,602 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:19:37,614 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_d1f3b431-84c3-44d8-becd-121236957fce/sv-benchmarks/c/product-lines/elevator_spec3_product22.cil.c[3205,3218] [2022-12-14 07:19:37,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:19:37,694 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:19:37,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:37 WrapperNode [2022-12-14 07:19:37,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:19:37,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:19:37,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:19:37,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:19:37,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:37" (1/1) ... [2022-12-14 07:19:37,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:37" (1/1) ... [2022-12-14 07:19:37,757 INFO L138 Inliner]: procedures = 92, calls = 351, calls flagged for inlining = 26, calls inlined = 22, statements flattened = 905 [2022-12-14 07:19:37,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:19:37,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:19:37,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:19:37,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:19:37,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:37" (1/1) ... [2022-12-14 07:19:37,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:37" (1/1) ... [2022-12-14 07:19:37,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:37" (1/1) ... [2022-12-14 07:19:37,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:37" (1/1) ... [2022-12-14 07:19:37,797 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:37" (1/1) ... [2022-12-14 07:19:37,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:37" (1/1) ... [2022-12-14 07:19:37,812 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:37" (1/1) ... [2022-12-14 07:19:37,817 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:37" (1/1) ... [2022-12-14 07:19:37,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:19:37,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:19:37,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:19:37,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:19:37,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:37" (1/1) ... [2022-12-14 07:19:37,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:19:37,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:19:37,855 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:19:37,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:19:37,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:19:37,888 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2022-12-14 07:19:37,888 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2022-12-14 07:19:37,888 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 07:19:37,888 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 07:19:37,888 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 07:19:37,888 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 07:19:37,889 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 07:19:37,889 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 07:19:37,889 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2022-12-14 07:19:37,889 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2022-12-14 07:19:37,889 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 07:19:37,889 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 07:19:37,889 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 07:19:37,889 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 07:19:37,889 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 07:19:37,889 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 07:19:37,889 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 07:19:37,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 07:19:37,889 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 07:19:37,889 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 07:19:37,889 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 07:19:37,890 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 07:19:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 07:19:37,890 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 07:19:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 07:19:37,890 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 07:19:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2022-12-14 07:19:37,890 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2022-12-14 07:19:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 07:19:37,890 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 07:19:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2022-12-14 07:19:37,890 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2022-12-14 07:19:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 07:19:37,890 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 07:19:37,890 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 07:19:37,890 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 07:19:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 07:19:37,891 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 07:19:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 07:19:37,891 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 07:19:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:19:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 07:19:37,891 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 07:19:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 07:19:37,891 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 07:19:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 07:19:37,891 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 07:19:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 07:19:37,891 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 07:19:37,891 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-12-14 07:19:37,891 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-12-14 07:19:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 07:19:37,892 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 07:19:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:19:37,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:19:37,892 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 07:19:37,892 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 07:19:38,014 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:19:38,016 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:19:38,801 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:19:39,215 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:19:39,216 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 07:19:39,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:19:39 BoogieIcfgContainer [2022-12-14 07:19:39,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:19:39,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:19:39,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:19:39,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:19:39,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:19:37" (1/3) ... [2022-12-14 07:19:39,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d051992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:19:39, skipping insertion in model container [2022-12-14 07:19:39,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:19:37" (2/3) ... [2022-12-14 07:19:39,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d051992 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:19:39, skipping insertion in model container [2022-12-14 07:19:39,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:19:39" (3/3) ... [2022-12-14 07:19:39,225 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product22.cil.c [2022-12-14 07:19:39,241 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:19:39,241 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:19:39,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:19:39,296 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;@74944cb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:19:39,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 07:19:39,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 411 states, 274 states have (on average 1.572992700729927) internal successors, (431), 294 states have internal predecessors, (431), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-12-14 07:19:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 07:19:39,315 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:39,316 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:39,316 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:19:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:39,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1747377381, now seen corresponding path program 1 times [2022-12-14 07:19:39,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:19:39,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232211828] [2022-12-14 07:19:39,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:39,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:19:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:39,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:19:39,944 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:19:39,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232211828] [2022-12-14 07:19:39,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232211828] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:19:39,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:19:39,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:19:39,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899858626] [2022-12-14 07:19:39,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:39,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:19:39,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:19:39,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:19:39,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:19:39,980 INFO L87 Difference]: Start difference. First operand has 411 states, 274 states have (on average 1.572992700729927) internal successors, (431), 294 states have internal predecessors, (431), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 07:19:40,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:40,822 INFO L93 Difference]: Finished difference Result 1171 states and 1873 transitions. [2022-12-14 07:19:40,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:19:40,824 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 49 [2022-12-14 07:19:40,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:40,838 INFO L225 Difference]: With dead ends: 1171 [2022-12-14 07:19:40,838 INFO L226 Difference]: Without dead ends: 762 [2022-12-14 07:19:40,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:19:40,847 INFO L413 NwaCegarLoop]: 701 mSDtfsCounter, 545 mSDsluCounter, 2427 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 3128 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:40,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 3128 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:19:40,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-12-14 07:19:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 754. [2022-12-14 07:19:40,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 505 states have (on average 1.500990099009901) internal successors, (758), 539 states have internal predecessors, (758), 200 states have call successors, (200), 51 states have call predecessors, (200), 48 states have return successors, (203), 190 states have call predecessors, (203), 196 states have call successors, (203) [2022-12-14 07:19:40,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1161 transitions. [2022-12-14 07:19:40,923 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1161 transitions. Word has length 49 [2022-12-14 07:19:40,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:40,924 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1161 transitions. [2022-12-14 07:19:40,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 4 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 07:19:40,924 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1161 transitions. [2022-12-14 07:19:40,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 07:19:40,925 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:40,926 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:40,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:19:40,926 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:19:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:40,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1062214604, now seen corresponding path program 1 times [2022-12-14 07:19:40,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:19:40,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263304363] [2022-12-14 07:19:40,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:40,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:19:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:19:41,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:19:41,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263304363] [2022-12-14 07:19:41,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263304363] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:19:41,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:19:41,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 07:19:41,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253765038] [2022-12-14 07:19:41,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:41,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:19:41,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:19:41,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:19:41,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:19:41,135 INFO L87 Difference]: Start difference. First operand 754 states and 1161 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 07:19:41,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:41,404 INFO L93 Difference]: Finished difference Result 2232 states and 3471 transitions. [2022-12-14 07:19:41,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:19:41,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 50 [2022-12-14 07:19:41,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:41,414 INFO L225 Difference]: With dead ends: 2232 [2022-12-14 07:19:41,414 INFO L226 Difference]: Without dead ends: 1491 [2022-12-14 07:19:41,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:19:41,418 INFO L413 NwaCegarLoop]: 700 mSDtfsCounter, 602 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:41,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 1281 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:19:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2022-12-14 07:19:41,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1419. [2022-12-14 07:19:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 979 states have (on average 1.5148110316649643) internal successors, (1483), 1031 states have internal predecessors, (1483), 353 states have call successors, (353), 91 states have call predecessors, (353), 86 states have return successors, (373), 324 states have call predecessors, (373), 347 states have call successors, (373) [2022-12-14 07:19:41,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 2209 transitions. [2022-12-14 07:19:41,487 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 2209 transitions. Word has length 50 [2022-12-14 07:19:41,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:41,488 INFO L495 AbstractCegarLoop]: Abstraction has 1419 states and 2209 transitions. [2022-12-14 07:19:41,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 07:19:41,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 2209 transitions. [2022-12-14 07:19:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 07:19:41,492 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:41,492 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:41,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:19:41,492 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:19:41,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:41,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1701121196, now seen corresponding path program 1 times [2022-12-14 07:19:41,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:19:41,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370158604] [2022-12-14 07:19:41,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:41,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:19:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:19:41,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:19:41,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370158604] [2022-12-14 07:19:41,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370158604] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:19:41,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:19:41,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 07:19:41,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167491992] [2022-12-14 07:19:41,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:41,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:19:41,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:19:41,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:19:41,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 07:19:41,868 INFO L87 Difference]: Start difference. First operand 1419 states and 2209 transitions. Second operand has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 07:19:42,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:42,634 INFO L93 Difference]: Finished difference Result 3701 states and 5970 transitions. [2022-12-14 07:19:42,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:19:42,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2022-12-14 07:19:42,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:42,676 INFO L225 Difference]: With dead ends: 3701 [2022-12-14 07:19:42,677 INFO L226 Difference]: Without dead ends: 2294 [2022-12-14 07:19:42,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 07:19:42,692 INFO L413 NwaCegarLoop]: 774 mSDtfsCounter, 675 mSDsluCounter, 2675 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 3449 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:42,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 3449 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:19:42,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2022-12-14 07:19:42,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2080. [2022-12-14 07:19:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 1439 states have (on average 1.507991660875608) internal successors, (2170), 1523 states have internal predecessors, (2170), 512 states have call successors, (512), 135 states have call predecessors, (512), 128 states have return successors, (581), 464 states have call predecessors, (581), 504 states have call successors, (581) [2022-12-14 07:19:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 3263 transitions. [2022-12-14 07:19:42,839 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 3263 transitions. Word has length 87 [2022-12-14 07:19:42,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:42,839 INFO L495 AbstractCegarLoop]: Abstraction has 2080 states and 3263 transitions. [2022-12-14 07:19:42,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 07:19:42,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 3263 transitions. [2022-12-14 07:19:42,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 07:19:42,845 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:42,846 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:42,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:19:42,846 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:19:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:42,847 INFO L85 PathProgramCache]: Analyzing trace with hash -759128987, now seen corresponding path program 1 times [2022-12-14 07:19:42,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:19:42,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084929649] [2022-12-14 07:19:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:42,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:19:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:19:43,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:19:43,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084929649] [2022-12-14 07:19:43,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084929649] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:19:43,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487655756] [2022-12-14 07:19:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:43,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:43,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:19:43,053 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:19:43,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 07:19:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:43,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 1807 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:19:43,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:19:43,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:19:43,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487655756] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:19:43,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:19:43,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 07:19:43,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24229363] [2022-12-14 07:19:43,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:43,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:19:43,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:19:43,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:19:43,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:19:43,419 INFO L87 Difference]: Start difference. First operand 2080 states and 3263 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 07:19:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:43,730 INFO L93 Difference]: Finished difference Result 5950 states and 9595 transitions. [2022-12-14 07:19:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:19:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 86 [2022-12-14 07:19:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:43,758 INFO L225 Difference]: With dead ends: 5950 [2022-12-14 07:19:43,758 INFO L226 Difference]: Without dead ends: 3882 [2022-12-14 07:19:43,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:19:43,773 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 565 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:43,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1192 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:19:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2022-12-14 07:19:43,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3764. [2022-12-14 07:19:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 2621 states have (on average 1.5215566577642121) internal successors, (3988), 2791 states have internal predecessors, (3988), 903 states have call successors, (903), 240 states have call predecessors, (903), 239 states have return successors, (1072), 818 states have call predecessors, (1072), 895 states have call successors, (1072) [2022-12-14 07:19:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 5963 transitions. [2022-12-14 07:19:43,943 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 5963 transitions. Word has length 86 [2022-12-14 07:19:43,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:43,943 INFO L495 AbstractCegarLoop]: Abstraction has 3764 states and 5963 transitions. [2022-12-14 07:19:43,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 07:19:43,944 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 5963 transitions. [2022-12-14 07:19:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 07:19:43,946 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:43,946 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:43,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 07:19:44,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:44,147 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:19:44,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:44,147 INFO L85 PathProgramCache]: Analyzing trace with hash 26840467, now seen corresponding path program 1 times [2022-12-14 07:19:44,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:19:44,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444609123] [2022-12-14 07:19:44,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:44,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:19:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 07:19:44,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:19:44,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444609123] [2022-12-14 07:19:44,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444609123] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:19:44,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236570187] [2022-12-14 07:19:44,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:44,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:44,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:19:44,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:19:44,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 07:19:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:44,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1808 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 07:19:44,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:19:44,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:19:44,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236570187] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:19:44,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:19:44,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 07:19:44,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25120191] [2022-12-14 07:19:44,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:44,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:19:44,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:19:44,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:19:44,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:19:44,699 INFO L87 Difference]: Start difference. First operand 3764 states and 5963 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 07:19:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:45,026 INFO L93 Difference]: Finished difference Result 8443 states and 13531 transitions. [2022-12-14 07:19:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:19:45,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 87 [2022-12-14 07:19:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:45,068 INFO L225 Difference]: With dead ends: 8443 [2022-12-14 07:19:45,068 INFO L226 Difference]: Without dead ends: 4691 [2022-12-14 07:19:45,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:19:45,112 INFO L413 NwaCegarLoop]: 720 mSDtfsCounter, 563 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 1225 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:45,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 1225 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:19:45,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4691 states. [2022-12-14 07:19:45,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4691 to 4627. [2022-12-14 07:19:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 3233 states have (on average 1.5310856789359728) internal successors, (4950), 3446 states have internal predecessors, (4950), 1100 states have call successors, (1100), 291 states have call predecessors, (1100), 293 states have return successors, (1306), 998 states have call predecessors, (1306), 1092 states have call successors, (1306) [2022-12-14 07:19:45,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 7356 transitions. [2022-12-14 07:19:45,377 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 7356 transitions. Word has length 87 [2022-12-14 07:19:45,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:45,378 INFO L495 AbstractCegarLoop]: Abstraction has 4627 states and 7356 transitions. [2022-12-14 07:19:45,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-12-14 07:19:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 7356 transitions. [2022-12-14 07:19:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 07:19:45,380 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:45,380 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 07:19:45,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 07:19:45,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:45,581 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:19:45,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:45,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1118072584, now seen corresponding path program 1 times [2022-12-14 07:19:45,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:19:45,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436580692] [2022-12-14 07:19:45,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:45,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:19:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:19:46,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:19:46,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436580692] [2022-12-14 07:19:46,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436580692] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:19:46,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572549457] [2022-12-14 07:19:46,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:46,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:46,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:19:46,007 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:19:46,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 07:19:46,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:46,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 1833 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 07:19:46,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:19:46,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:19:46,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572549457] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:19:46,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:19:46,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-12-14 07:19:46,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805491273] [2022-12-14 07:19:46,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:46,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 07:19:46,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:19:46,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 07:19:46,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:19:46,348 INFO L87 Difference]: Start difference. First operand 4627 states and 7356 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 07:19:46,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:46,901 INFO L93 Difference]: Finished difference Result 9113 states and 14772 transitions. [2022-12-14 07:19:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:19:46,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 93 [2022-12-14 07:19:46,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:46,939 INFO L225 Difference]: With dead ends: 9113 [2022-12-14 07:19:46,940 INFO L226 Difference]: Without dead ends: 5707 [2022-12-14 07:19:46,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-12-14 07:19:46,959 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 177 mSDsluCounter, 1786 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2426 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:46,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2426 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:19:46,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2022-12-14 07:19:47,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 5163. [2022-12-14 07:19:47,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 3539 states have (on average 1.5241593670528397) internal successors, (5394), 3825 states have internal predecessors, (5394), 1323 states have call successors, (1323), 291 states have call predecessors, (1323), 300 states have return successors, (1557), 1197 states have call predecessors, (1557), 1315 states have call successors, (1557) [2022-12-14 07:19:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 8274 transitions. [2022-12-14 07:19:47,285 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 8274 transitions. Word has length 93 [2022-12-14 07:19:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:47,285 INFO L495 AbstractCegarLoop]: Abstraction has 5163 states and 8274 transitions. [2022-12-14 07:19:47,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 07:19:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 8274 transitions. [2022-12-14 07:19:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 07:19:47,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:47,289 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 07:19:47,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 07:19:47,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:47,490 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:19:47,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:47,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1564043272, now seen corresponding path program 1 times [2022-12-14 07:19:47,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:19:47,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154288155] [2022-12-14 07:19:47,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:47,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:19:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:19:48,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:19:48,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154288155] [2022-12-14 07:19:48,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154288155] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:19:48,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058410061] [2022-12-14 07:19:48,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:48,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:48,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:19:48,048 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:19:48,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 07:19:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:48,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 1840 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 07:19:48,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:19:48,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:19:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:19:48,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058410061] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 07:19:48,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:19:48,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 22 [2022-12-14 07:19:48,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369837777] [2022-12-14 07:19:48,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:48,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 07:19:48,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:19:48,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 07:19:48,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-12-14 07:19:48,839 INFO L87 Difference]: Start difference. First operand 5163 states and 8274 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-12-14 07:19:50,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:50,968 INFO L93 Difference]: Finished difference Result 9851 states and 15893 transitions. [2022-12-14 07:19:50,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 07:19:50,968 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 95 [2022-12-14 07:19:50,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:50,997 INFO L225 Difference]: With dead ends: 9851 [2022-12-14 07:19:50,997 INFO L226 Difference]: Without dead ends: 5933 [2022-12-14 07:19:51,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 177 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-12-14 07:19:51,016 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 1226 mSDsluCounter, 1867 mSDsCounter, 0 mSdLazyCounter, 2571 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1312 SdHoareTripleChecker+Valid, 2512 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 2571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:51,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1312 Valid, 2512 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 2571 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 07:19:51,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5933 states. [2022-12-14 07:19:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5933 to 4906. [2022-12-14 07:19:51,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4906 states, 3424 states have (on average 1.5073014018691588) internal successors, (5161), 3637 states have internal predecessors, (5161), 1140 states have call successors, (1140), 297 states have call predecessors, (1140), 341 states have return successors, (1466), 1074 states have call predecessors, (1466), 1132 states have call successors, (1466) [2022-12-14 07:19:51,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4906 states to 4906 states and 7767 transitions. [2022-12-14 07:19:51,252 INFO L78 Accepts]: Start accepts. Automaton has 4906 states and 7767 transitions. Word has length 95 [2022-12-14 07:19:51,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:51,252 INFO L495 AbstractCegarLoop]: Abstraction has 4906 states and 7767 transitions. [2022-12-14 07:19:51,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 7 states have call successors, (19), 4 states have call predecessors, (19), 5 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-12-14 07:19:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 4906 states and 7767 transitions. [2022-12-14 07:19:51,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-12-14 07:19:51,255 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:51,255 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 07:19:51,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 07:19:51,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:51,457 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:19:51,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:51,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1136161466, now seen corresponding path program 1 times [2022-12-14 07:19:51,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:19:51,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723971078] [2022-12-14 07:19:51,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:51,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:19:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:19:51,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:19:51,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723971078] [2022-12-14 07:19:51,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723971078] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:19:51,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747756713] [2022-12-14 07:19:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:51,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:51,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:19:51,958 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:19:51,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 07:19:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:52,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 07:19:52,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:19:52,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:19:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 07:19:52,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747756713] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 07:19:52,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:19:52,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10, 9] total 21 [2022-12-14 07:19:52,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666814118] [2022-12-14 07:19:52,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:52,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 07:19:52,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:19:52,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 07:19:52,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-12-14 07:19:52,769 INFO L87 Difference]: Start difference. First operand 4906 states and 7767 transitions. Second operand has 10 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 07:19:55,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:55,521 INFO L93 Difference]: Finished difference Result 13741 states and 23761 transitions. [2022-12-14 07:19:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 07:19:55,521 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 97 [2022-12-14 07:19:55,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:55,560 INFO L225 Difference]: With dead ends: 13741 [2022-12-14 07:19:55,560 INFO L226 Difference]: Without dead ends: 10680 [2022-12-14 07:19:55,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 07:19:55,577 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 2516 mSDsluCounter, 2873 mSDsCounter, 0 mSdLazyCounter, 3419 mSolverCounterSat, 1144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2615 SdHoareTripleChecker+Valid, 3596 SdHoareTripleChecker+Invalid, 4563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1144 IncrementalHoareTripleChecker+Valid, 3419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:55,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2615 Valid, 3596 Invalid, 4563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1144 Valid, 3419 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 07:19:55,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10680 states. [2022-12-14 07:19:56,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10680 to 9547. [2022-12-14 07:19:56,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9547 states, 6772 states have (on average 1.514619019492026) internal successors, (10257), 7121 states have internal predecessors, (10257), 2076 states have call successors, (2076), 564 states have call predecessors, (2076), 698 states have return successors, (3365), 2021 states have call predecessors, (3365), 2065 states have call successors, (3365) [2022-12-14 07:19:56,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9547 states to 9547 states and 15698 transitions. [2022-12-14 07:19:56,140 INFO L78 Accepts]: Start accepts. Automaton has 9547 states and 15698 transitions. Word has length 97 [2022-12-14 07:19:56,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:56,141 INFO L495 AbstractCegarLoop]: Abstraction has 9547 states and 15698 transitions. [2022-12-14 07:19:56,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 states have internal predecessors, (58), 5 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-12-14 07:19:56,141 INFO L276 IsEmpty]: Start isEmpty. Operand 9547 states and 15698 transitions. [2022-12-14 07:19:56,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-12-14 07:19:56,144 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:56,144 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 07:19:56,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 07:19:56,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:56,345 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:19:56,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:56,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1718020597, now seen corresponding path program 1 times [2022-12-14 07:19:56,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:19:56,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394280790] [2022-12-14 07:19:56,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:56,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:19:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 07:19:56,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:19:56,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394280790] [2022-12-14 07:19:56,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394280790] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:19:56,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503188591] [2022-12-14 07:19:56,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:56,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:56,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:19:56,730 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:19:56,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 07:19:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:56,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 1855 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:19:56,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:19:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 07:19:57,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:19:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:19:57,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503188591] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 07:19:57,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 07:19:57,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 7] total 17 [2022-12-14 07:19:57,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202843855] [2022-12-14 07:19:57,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:19:57,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:19:57,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:19:57,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:19:57,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-12-14 07:19:57,277 INFO L87 Difference]: Start difference. First operand 9547 states and 15698 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-12-14 07:19:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:19:58,709 INFO L93 Difference]: Finished difference Result 18107 states and 30127 transitions. [2022-12-14 07:19:58,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 07:19:58,710 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 101 [2022-12-14 07:19:58,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:19:58,746 INFO L225 Difference]: With dead ends: 18107 [2022-12-14 07:19:58,746 INFO L226 Difference]: Without dead ends: 10405 [2022-12-14 07:19:58,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 193 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-12-14 07:19:58,772 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 977 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1073 SdHoareTripleChecker+Valid, 1948 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:19:58,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1073 Valid, 1948 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1722 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 07:19:58,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10405 states. [2022-12-14 07:19:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10405 to 9535. [2022-12-14 07:19:59,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9535 states, 6772 states have (on average 1.514619019492026) internal successors, (10257), 7109 states have internal predecessors, (10257), 2064 states have call successors, (2064), 564 states have call predecessors, (2064), 698 states have return successors, (3329), 2021 states have call predecessors, (3329), 2053 states have call successors, (3329) [2022-12-14 07:19:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9535 states to 9535 states and 15650 transitions. [2022-12-14 07:19:59,336 INFO L78 Accepts]: Start accepts. Automaton has 9535 states and 15650 transitions. Word has length 101 [2022-12-14 07:19:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:19:59,337 INFO L495 AbstractCegarLoop]: Abstraction has 9535 states and 15650 transitions. [2022-12-14 07:19:59,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-12-14 07:19:59,337 INFO L276 IsEmpty]: Start isEmpty. Operand 9535 states and 15650 transitions. [2022-12-14 07:19:59,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 07:19:59,341 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:19:59,341 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:19:59,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 07:19:59,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 07:19:59,541 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:19:59,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:19:59,542 INFO L85 PathProgramCache]: Analyzing trace with hash -648660930, now seen corresponding path program 1 times [2022-12-14 07:19:59,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:19:59,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244559547] [2022-12-14 07:19:59,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:59,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:19:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:19:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:19:59,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:19:59,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244559547] [2022-12-14 07:19:59,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244559547] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:19:59,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151868032] [2022-12-14 07:19:59,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:19:59,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:19:59,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:19:59,889 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:19:59,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 07:20:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:00,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:20:00,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:20:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:20:00,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:20:00,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151868032] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:20:00,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:20:00,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-12-14 07:20:00,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610697367] [2022-12-14 07:20:00,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:20:00,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:20:00,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:20:00,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:20:00,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 07:20:00,192 INFO L87 Difference]: Start difference. First operand 9535 states and 15650 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 07:20:00,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:20:00,711 INFO L93 Difference]: Finished difference Result 18263 states and 30909 transitions. [2022-12-14 07:20:00,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:20:00,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 127 [2022-12-14 07:20:00,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:20:00,750 INFO L225 Difference]: With dead ends: 18263 [2022-12-14 07:20:00,750 INFO L226 Difference]: Without dead ends: 9991 [2022-12-14 07:20:00,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 07:20:00,781 INFO L413 NwaCegarLoop]: 605 mSDtfsCounter, 2 mSDsluCounter, 2989 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3594 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:20:00,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3594 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:20:00,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9991 states. [2022-12-14 07:20:01,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9991 to 9865. [2022-12-14 07:20:01,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9865 states, 6994 states have (on average 1.4982842436374035) internal successors, (10479), 7355 states have internal predecessors, (10479), 2064 states have call successors, (2064), 564 states have call predecessors, (2064), 806 states have return successors, (4013), 2105 states have call predecessors, (4013), 2053 states have call successors, (4013) [2022-12-14 07:20:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9865 states to 9865 states and 16556 transitions. [2022-12-14 07:20:01,459 INFO L78 Accepts]: Start accepts. Automaton has 9865 states and 16556 transitions. Word has length 127 [2022-12-14 07:20:01,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:20:01,459 INFO L495 AbstractCegarLoop]: Abstraction has 9865 states and 16556 transitions. [2022-12-14 07:20:01,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 07:20:01,460 INFO L276 IsEmpty]: Start isEmpty. Operand 9865 states and 16556 transitions. [2022-12-14 07:20:01,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 07:20:01,463 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:20:01,463 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:20:01,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 07:20:01,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:01,664 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:20:01,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:20:01,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1885550314, now seen corresponding path program 1 times [2022-12-14 07:20:01,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:20:01,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490241205] [2022-12-14 07:20:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:01,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:20:01,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 07:20:01,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:20:01,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490241205] [2022-12-14 07:20:01,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490241205] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:20:01,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058044874] [2022-12-14 07:20:01,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:01,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:01,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:20:01,997 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:20:01,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 07:20:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:02,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:20:02,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:20:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 07:20:02,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:20:02,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058044874] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:20:02,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:20:02,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-12-14 07:20:02,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942135961] [2022-12-14 07:20:02,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:20:02,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:20:02,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:20:02,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:20:02,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 07:20:02,266 INFO L87 Difference]: Start difference. First operand 9865 states and 16556 transitions. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 07:20:02,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:20:02,803 INFO L93 Difference]: Finished difference Result 18803 states and 32269 transitions. [2022-12-14 07:20:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:20:02,803 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 131 [2022-12-14 07:20:02,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:20:02,837 INFO L225 Difference]: With dead ends: 18803 [2022-12-14 07:20:02,837 INFO L226 Difference]: Without dead ends: 10213 [2022-12-14 07:20:02,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 07:20:02,866 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 2 mSDsluCounter, 2991 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3597 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:20:02,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3597 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:20:02,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10213 states. [2022-12-14 07:20:03,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10213 to 9919. [2022-12-14 07:20:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9919 states, 7048 states have (on average 1.494466515323496) internal successors, (10533), 7355 states have internal predecessors, (10533), 2064 states have call successors, (2064), 564 states have call predecessors, (2064), 806 states have return successors, (4013), 2159 states have call predecessors, (4013), 2053 states have call successors, (4013) [2022-12-14 07:20:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9919 states to 9919 states and 16610 transitions. [2022-12-14 07:20:03,554 INFO L78 Accepts]: Start accepts. Automaton has 9919 states and 16610 transitions. Word has length 131 [2022-12-14 07:20:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:20:03,554 INFO L495 AbstractCegarLoop]: Abstraction has 9919 states and 16610 transitions. [2022-12-14 07:20:03,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 07:20:03,554 INFO L276 IsEmpty]: Start isEmpty. Operand 9919 states and 16610 transitions. [2022-12-14 07:20:03,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 07:20:03,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:20:03,558 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 07:20:03,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 07:20:03,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 07:20:03,760 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:20:03,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:20:03,762 INFO L85 PathProgramCache]: Analyzing trace with hash 372097740, now seen corresponding path program 1 times [2022-12-14 07:20:03,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:20:03,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531213380] [2022-12-14 07:20:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:03,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:20:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 07:20:04,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:20:04,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531213380] [2022-12-14 07:20:04,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531213380] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:20:04,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001202392] [2022-12-14 07:20:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:04,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:04,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:20:04,168 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:20:04,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 07:20:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:04,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1966 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:20:04,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:20:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:20:04,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:20:04,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001202392] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:20:04,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:20:04,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2022-12-14 07:20:04,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310902983] [2022-12-14 07:20:04,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:20:04,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:20:04,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:20:04,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:20:04,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 07:20:04,439 INFO L87 Difference]: Start difference. First operand 9919 states and 16610 transitions. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 07:20:04,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:20:04,990 INFO L93 Difference]: Finished difference Result 18911 states and 32377 transitions. [2022-12-14 07:20:04,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:20:04,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) Word has length 128 [2022-12-14 07:20:04,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:20:05,063 INFO L225 Difference]: With dead ends: 18911 [2022-12-14 07:20:05,063 INFO L226 Difference]: Without dead ends: 10267 [2022-12-14 07:20:05,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-12-14 07:20:05,085 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 2 mSDsluCounter, 2991 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3597 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:20:05,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3597 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:20:05,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10267 states. [2022-12-14 07:20:05,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10267 to 9973. [2022-12-14 07:20:05,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9973 states, 7102 states have (on average 1.4907068431427766) internal successors, (10587), 7355 states have internal predecessors, (10587), 2064 states have call successors, (2064), 564 states have call predecessors, (2064), 806 states have return successors, (4013), 2213 states have call predecessors, (4013), 2053 states have call successors, (4013) [2022-12-14 07:20:05,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9973 states to 9973 states and 16664 transitions. [2022-12-14 07:20:05,513 INFO L78 Accepts]: Start accepts. Automaton has 9973 states and 16664 transitions. Word has length 128 [2022-12-14 07:20:05,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:20:05,514 INFO L495 AbstractCegarLoop]: Abstraction has 9973 states and 16664 transitions. [2022-12-14 07:20:05,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (25), 2 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 2 states have call successors, (23) [2022-12-14 07:20:05,514 INFO L276 IsEmpty]: Start isEmpty. Operand 9973 states and 16664 transitions. [2022-12-14 07:20:05,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 07:20:05,518 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:20:05,518 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:20:05,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 07:20:05,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 07:20:05,734 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:20:05,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:20:05,735 INFO L85 PathProgramCache]: Analyzing trace with hash -911303630, now seen corresponding path program 1 times [2022-12-14 07:20:05,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:20:05,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387356017] [2022-12-14 07:20:05,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:05,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:20:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:06,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:20:06,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:20:06,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387356017] [2022-12-14 07:20:06,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387356017] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:20:06,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777451395] [2022-12-14 07:20:06,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:06,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:06,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:20:06,078 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:20:06,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 07:20:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:06,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1971 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 07:20:06,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:20:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 07:20:06,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:20:06,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777451395] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:20:06,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:20:06,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2022-12-14 07:20:06,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612750635] [2022-12-14 07:20:06,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:20:06,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 07:20:06,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:20:06,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 07:20:06,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-12-14 07:20:06,367 INFO L87 Difference]: Start difference. First operand 9973 states and 16664 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 07:20:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:20:07,166 INFO L93 Difference]: Finished difference Result 21578 states and 36160 transitions. [2022-12-14 07:20:07,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 07:20:07,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 137 [2022-12-14 07:20:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:20:07,220 INFO L225 Difference]: With dead ends: 21578 [2022-12-14 07:20:07,220 INFO L226 Difference]: Without dead ends: 11617 [2022-12-14 07:20:07,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:20:07,256 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 423 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:20:07,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 1779 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:20:07,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11617 states. [2022-12-14 07:20:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11617 to 11345. [2022-12-14 07:20:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11345 states, 8058 states have (on average 1.4687267311988086) internal successors, (11835), 8313 states have internal predecessors, (11835), 2342 states have call successors, (2342), 684 states have call predecessors, (2342), 944 states have return successors, (4631), 2507 states have call predecessors, (4631), 2325 states have call successors, (4631) [2022-12-14 07:20:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11345 states to 11345 states and 18808 transitions. [2022-12-14 07:20:07,816 INFO L78 Accepts]: Start accepts. Automaton has 11345 states and 18808 transitions. Word has length 137 [2022-12-14 07:20:07,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:20:07,817 INFO L495 AbstractCegarLoop]: Abstraction has 11345 states and 18808 transitions. [2022-12-14 07:20:07,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-12-14 07:20:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 11345 states and 18808 transitions. [2022-12-14 07:20:07,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-14 07:20:07,821 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:20:07,821 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:20:07,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 07:20:08,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 07:20:08,022 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:20:08,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:20:08,023 INFO L85 PathProgramCache]: Analyzing trace with hash 255968875, now seen corresponding path program 1 times [2022-12-14 07:20:08,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:20:08,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5206904] [2022-12-14 07:20:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:08,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:20:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:20:08,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:20:08,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5206904] [2022-12-14 07:20:08,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5206904] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:20:08,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90841405] [2022-12-14 07:20:08,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:08,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:08,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:20:08,356 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:20:08,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 07:20:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:08,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 1971 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 07:20:08,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:20:08,704 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:20:08,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:20:08,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90841405] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:20:08,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:20:08,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-12-14 07:20:08,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758610749] [2022-12-14 07:20:08,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:20:08,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:20:08,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:20:08,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:20:08,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:20:08,706 INFO L87 Difference]: Start difference. First operand 11345 states and 18808 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-12-14 07:20:09,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:20:09,525 INFO L93 Difference]: Finished difference Result 23541 states and 40497 transitions. [2022-12-14 07:20:09,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 07:20:09,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 138 [2022-12-14 07:20:09,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:20:09,571 INFO L225 Difference]: With dead ends: 23541 [2022-12-14 07:20:09,571 INFO L226 Difference]: Without dead ends: 11072 [2022-12-14 07:20:09,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-12-14 07:20:09,621 INFO L413 NwaCegarLoop]: 643 mSDtfsCounter, 247 mSDsluCounter, 2290 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 2933 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:20:09,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 2933 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:20:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11072 states. [2022-12-14 07:20:10,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11072 to 11052. [2022-12-14 07:20:10,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11052 states, 7831 states have (on average 1.444387689950198) internal successors, (11311), 8088 states have internal predecessors, (11311), 2298 states have call successors, (2298), 678 states have call predecessors, (2298), 922 states have return successors, (4482), 2445 states have call predecessors, (4482), 2281 states have call successors, (4482) [2022-12-14 07:20:10,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11052 states to 11052 states and 18091 transitions. [2022-12-14 07:20:10,187 INFO L78 Accepts]: Start accepts. Automaton has 11052 states and 18091 transitions. Word has length 138 [2022-12-14 07:20:10,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:20:10,187 INFO L495 AbstractCegarLoop]: Abstraction has 11052 states and 18091 transitions. [2022-12-14 07:20:10,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-12-14 07:20:10,187 INFO L276 IsEmpty]: Start isEmpty. Operand 11052 states and 18091 transitions. [2022-12-14 07:20:10,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 07:20:10,192 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:20:10,192 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:20:10,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 07:20:10,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 07:20:10,393 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:20:10,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:20:10,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2063158661, now seen corresponding path program 1 times [2022-12-14 07:20:10,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:20:10,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133845247] [2022-12-14 07:20:10,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:10,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:20:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:20:10,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:20:10,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133845247] [2022-12-14 07:20:10,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133845247] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:20:10,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319517237] [2022-12-14 07:20:10,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:10,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:10,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:20:10,735 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:20:10,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 07:20:10,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:10,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 07:20:10,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:20:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 07:20:10,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:20:10,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319517237] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:20:10,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:20:10,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-12-14 07:20:10,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277509381] [2022-12-14 07:20:10,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:20:10,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:20:10,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:20:10,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:20:10,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:20:10,994 INFO L87 Difference]: Start difference. First operand 11052 states and 18091 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-12-14 07:20:12,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:20:12,107 INFO L93 Difference]: Finished difference Result 23842 states and 40130 transitions. [2022-12-14 07:20:12,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:20:12,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 142 [2022-12-14 07:20:12,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:20:12,164 INFO L225 Difference]: With dead ends: 23842 [2022-12-14 07:20:12,164 INFO L226 Difference]: Without dead ends: 13677 [2022-12-14 07:20:12,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-12-14 07:20:12,214 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 275 mSDsluCounter, 2270 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 2905 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 07:20:12,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 2905 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 07:20:12,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13677 states. [2022-12-14 07:20:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13677 to 13677. [2022-12-14 07:20:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13677 states, 10053 states have (on average 1.4727941907888193) internal successors, (14806), 10391 states have internal predecessors, (14806), 2578 states have call successors, (2578), 720 states have call predecessors, (2578), 1045 states have return successors, (4762), 2725 states have call predecessors, (4762), 2561 states have call successors, (4762) [2022-12-14 07:20:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13677 states to 13677 states and 22146 transitions. [2022-12-14 07:20:12,896 INFO L78 Accepts]: Start accepts. Automaton has 13677 states and 22146 transitions. Word has length 142 [2022-12-14 07:20:12,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:20:12,896 INFO L495 AbstractCegarLoop]: Abstraction has 13677 states and 22146 transitions. [2022-12-14 07:20:12,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-12-14 07:20:12,897 INFO L276 IsEmpty]: Start isEmpty. Operand 13677 states and 22146 transitions. [2022-12-14 07:20:12,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-12-14 07:20:12,902 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:20:12,902 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-12-14 07:20:12,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 07:20:13,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 07:20:13,103 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:20:13,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:20:13,104 INFO L85 PathProgramCache]: Analyzing trace with hash -518817813, now seen corresponding path program 1 times [2022-12-14 07:20:13,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:20:13,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449289590] [2022-12-14 07:20:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:13,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:20:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 07:20:13,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:20:13,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449289590] [2022-12-14 07:20:13,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449289590] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:20:13,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601193499] [2022-12-14 07:20:13,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:13,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:13,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:20:13,416 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:20:13,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 07:20:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:13,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 07:20:13,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:20:13,775 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 07:20:13,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:20:13,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601193499] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:20:13,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:20:13,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 11 [2022-12-14 07:20:13,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779051702] [2022-12-14 07:20:13,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:20:13,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:20:13,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:20:13,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:20:13,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:20:13,777 INFO L87 Difference]: Start difference. First operand 13677 states and 22146 transitions. Second operand has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-12-14 07:20:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:20:15,661 INFO L93 Difference]: Finished difference Result 36088 states and 62057 transitions. [2022-12-14 07:20:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:20:15,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 143 [2022-12-14 07:20:15,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:20:15,771 INFO L225 Difference]: With dead ends: 36088 [2022-12-14 07:20:15,772 INFO L226 Difference]: Without dead ends: 22343 [2022-12-14 07:20:15,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:20:15,845 INFO L413 NwaCegarLoop]: 779 mSDtfsCounter, 625 mSDsluCounter, 2682 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 3461 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 07:20:15,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 3461 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 07:20:15,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22343 states. [2022-12-14 07:20:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22343 to 21026. [2022-12-14 07:20:16,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21026 states, 15450 states have (on average 1.4659546925566342) internal successors, (22649), 16015 states have internal predecessors, (22649), 3932 states have call successors, (3932), 1133 states have call predecessors, (3932), 1643 states have return successors, (8398), 4136 states have call predecessors, (8398), 3910 states have call successors, (8398) [2022-12-14 07:20:17,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21026 states to 21026 states and 34979 transitions. [2022-12-14 07:20:17,103 INFO L78 Accepts]: Start accepts. Automaton has 21026 states and 34979 transitions. Word has length 143 [2022-12-14 07:20:17,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:20:17,103 INFO L495 AbstractCegarLoop]: Abstraction has 21026 states and 34979 transitions. [2022-12-14 07:20:17,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2022-12-14 07:20:17,103 INFO L276 IsEmpty]: Start isEmpty. Operand 21026 states and 34979 transitions. [2022-12-14 07:20:17,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-12-14 07:20:17,112 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:20:17,112 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2022-12-14 07:20:17,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 07:20:17,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 07:20:17,313 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:20:17,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:20:17,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1284227365, now seen corresponding path program 1 times [2022-12-14 07:20:17,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:20:17,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446901673] [2022-12-14 07:20:17,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:17,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:20:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:17,994 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 07:20:17,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:20:17,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446901673] [2022-12-14 07:20:17,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446901673] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:20:17,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109046977] [2022-12-14 07:20:17,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:17,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:17,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:20:17,995 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:20:17,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 07:20:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:18,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 1990 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 07:20:18,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:20:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 07:20:18,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:20:18,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109046977] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:20:18,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:20:18,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-12-14 07:20:18,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820489708] [2022-12-14 07:20:18,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:20:18,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:20:18,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:20:18,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:20:18,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:20:18,475 INFO L87 Difference]: Start difference. First operand 21026 states and 34979 transitions. Second operand has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 07:20:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:20:20,437 INFO L93 Difference]: Finished difference Result 48190 states and 81381 transitions. [2022-12-14 07:20:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:20:20,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) Word has length 152 [2022-12-14 07:20:20,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:20:20,575 INFO L225 Difference]: With dead ends: 48190 [2022-12-14 07:20:20,575 INFO L226 Difference]: Without dead ends: 27176 [2022-12-14 07:20:20,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:20:20,742 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 583 mSDsluCounter, 2691 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 3464 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:20:20,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 3464 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 07:20:20,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27176 states. [2022-12-14 07:20:21,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27176 to 25768. [2022-12-14 07:20:21,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25768 states, 18963 states have (on average 1.4587354321573591) internal successors, (27662), 19671 states have internal predecessors, (27662), 4808 states have call successors, (4808), 1369 states have call predecessors, (4808), 1996 states have return successors, (9852), 5043 states have call predecessors, (9852), 4782 states have call successors, (9852) [2022-12-14 07:20:22,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25768 states to 25768 states and 42322 transitions. [2022-12-14 07:20:22,117 INFO L78 Accepts]: Start accepts. Automaton has 25768 states and 42322 transitions. Word has length 152 [2022-12-14 07:20:22,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:20:22,117 INFO L495 AbstractCegarLoop]: Abstraction has 25768 states and 42322 transitions. [2022-12-14 07:20:22,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 3 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (23), 3 states have call predecessors, (23), 3 states have call successors, (23) [2022-12-14 07:20:22,117 INFO L276 IsEmpty]: Start isEmpty. Operand 25768 states and 42322 transitions. [2022-12-14 07:20:22,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 07:20:22,124 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:20:22,124 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:20:22,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 07:20:22,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 07:20:22,325 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:20:22,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:20:22,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1768937041, now seen corresponding path program 1 times [2022-12-14 07:20:22,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:20:22,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425797145] [2022-12-14 07:20:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:22,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:20:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 07:20:22,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:20:22,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425797145] [2022-12-14 07:20:22,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425797145] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:20:22,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404092733] [2022-12-14 07:20:22,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:22,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:22,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:20:22,924 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:20:22,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 07:20:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:23,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 2007 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 07:20:23,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:20:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 07:20:23,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:20:23,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404092733] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:20:23,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:20:23,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-12-14 07:20:23,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313774846] [2022-12-14 07:20:23,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:20:23,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 07:20:23,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:20:23,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 07:20:23,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-14 07:20:23,459 INFO L87 Difference]: Start difference. First operand 25768 states and 42322 transitions. Second operand has 6 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-12-14 07:20:25,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:20:25,884 INFO L93 Difference]: Finished difference Result 52036 states and 87252 transitions. [2022-12-14 07:20:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:20:25,885 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 155 [2022-12-14 07:20:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:20:26,057 INFO L225 Difference]: With dead ends: 52036 [2022-12-14 07:20:26,057 INFO L226 Difference]: Without dead ends: 26280 [2022-12-14 07:20:26,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-12-14 07:20:26,144 INFO L413 NwaCegarLoop]: 762 mSDtfsCounter, 565 mSDsluCounter, 2464 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 3226 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:20:26,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 3226 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 07:20:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26280 states. [2022-12-14 07:20:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26280 to 24840. [2022-12-14 07:20:27,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24840 states, 18301 states have (on average 1.458007759138845) internal successors, (26683), 18980 states have internal predecessors, (26683), 4640 states have call successors, (4640), 1328 states have call predecessors, (4640), 1898 states have return successors, (9411), 4839 states have call predecessors, (9411), 4614 states have call successors, (9411) [2022-12-14 07:20:27,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24840 states to 24840 states and 40734 transitions. [2022-12-14 07:20:27,532 INFO L78 Accepts]: Start accepts. Automaton has 24840 states and 40734 transitions. Word has length 155 [2022-12-14 07:20:27,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:20:27,533 INFO L495 AbstractCegarLoop]: Abstraction has 24840 states and 40734 transitions. [2022-12-14 07:20:27,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2022-12-14 07:20:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 24840 states and 40734 transitions. [2022-12-14 07:20:27,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-12-14 07:20:27,538 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:20:27,539 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:20:27,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 07:20:27,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 07:20:27,740 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:20:27,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:20:27,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1238009729, now seen corresponding path program 1 times [2022-12-14 07:20:27,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:20:27,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101973920] [2022-12-14 07:20:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:27,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:20:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 07:20:27,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:20:27,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101973920] [2022-12-14 07:20:27,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101973920] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:20:27,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147077590] [2022-12-14 07:20:27,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:27,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:27,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:20:27,942 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:20:27,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 07:20:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:28,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 2418 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 07:20:28,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:20:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 07:20:28,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:20:28,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147077590] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:20:28,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:20:28,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2022-12-14 07:20:28,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414706179] [2022-12-14 07:20:28,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:20:28,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 07:20:28,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:20:28,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 07:20:28,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-12-14 07:20:28,346 INFO L87 Difference]: Start difference. First operand 24840 states and 40734 transitions. Second operand has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 5 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2022-12-14 07:20:31,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:20:31,945 INFO L93 Difference]: Finished difference Result 53519 states and 89064 transitions. [2022-12-14 07:20:31,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 07:20:31,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 5 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) Word has length 151 [2022-12-14 07:20:31,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:20:32,080 INFO L225 Difference]: With dead ends: 53519 [2022-12-14 07:20:32,081 INFO L226 Difference]: Without dead ends: 28581 [2022-12-14 07:20:32,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-12-14 07:20:32,182 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 1201 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 3405 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1289 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 3906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 3405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:20:32,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1289 Valid, 1481 Invalid, 3906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 3405 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 07:20:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28581 states. [2022-12-14 07:20:33,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28581 to 24815. [2022-12-14 07:20:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24815 states, 18276 states have (on average 1.4583606916174217) internal successors, (26653), 18955 states have internal predecessors, (26653), 4640 states have call successors, (4640), 1328 states have call predecessors, (4640), 1898 states have return successors, (9411), 4839 states have call predecessors, (9411), 4614 states have call successors, (9411) [2022-12-14 07:20:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24815 states to 24815 states and 40704 transitions. [2022-12-14 07:20:34,041 INFO L78 Accepts]: Start accepts. Automaton has 24815 states and 40704 transitions. Word has length 151 [2022-12-14 07:20:34,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:20:34,042 INFO L495 AbstractCegarLoop]: Abstraction has 24815 states and 40704 transitions. [2022-12-14 07:20:34,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 5 states have call successors, (27), 4 states have call predecessors, (27), 5 states have return successors, (25), 6 states have call predecessors, (25), 5 states have call successors, (25) [2022-12-14 07:20:34,042 INFO L276 IsEmpty]: Start isEmpty. Operand 24815 states and 40704 transitions. [2022-12-14 07:20:34,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-12-14 07:20:34,047 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:20:34,048 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:20:34,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 07:20:34,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:34,249 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:20:34,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:20:34,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1640001773, now seen corresponding path program 1 times [2022-12-14 07:20:34,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:20:34,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489810837] [2022-12-14 07:20:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:34,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:20:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-12-14 07:20:35,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:20:35,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489810837] [2022-12-14 07:20:35,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489810837] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:20:35,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810792892] [2022-12-14 07:20:35,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:20:35,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:20:35,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:20:35,050 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:20:35,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 07:20:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:20:35,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 2476 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:20:35,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:20:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-12-14 07:20:35,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:20:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 07:20:35,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810792892] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:20:35,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [507199452] [2022-12-14 07:20:35,675 INFO L159 IcfgInterpreter]: Started Sifa with 107 locations of interest [2022-12-14 07:20:35,675 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:20:35,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:20:35,681 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:20:35,682 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:20:41,637 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 679 for LOIs [2022-12-14 07:20:48,361 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 25 for LOIs [2022-12-14 07:20:48,363 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__twothirdsfull with input of size 199 for LOIs [2022-12-14 07:20:49,970 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 55 for LOIs [2022-12-14 07:20:50,277 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 69 for LOIs [2022-12-14 07:20:50,385 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 66 for LOIs [2022-12-14 07:20:50,396 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 54 for LOIs [2022-12-14 07:20:50,408 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2022-12-14 07:20:52,731 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2022-12-14 07:20:52,926 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 42 for LOIs [2022-12-14 07:20:52,930 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 69 for LOIs [2022-12-14 07:20:52,953 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 42 for LOIs [2022-12-14 07:20:52,958 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2022-12-14 07:20:56,303 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 07:20:56,909 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 07:20:57,047 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:22:03,959 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '828212#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 07:22:03,959 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:22:03,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:22:03,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 9] total 29 [2022-12-14 07:22:03,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915171349] [2022-12-14 07:22:03,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:22:03,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 07:22:03,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:03,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 07:22:03,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=12789, Unknown=0, NotChecked=0, Total=13572 [2022-12-14 07:22:03,963 INFO L87 Difference]: Start difference. First operand 24815 states and 40704 transitions. Second operand has 29 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 25 states have internal predecessors, (167), 16 states have call successors, (58), 7 states have call predecessors, (58), 15 states have return successors, (59), 19 states have call predecessors, (59), 16 states have call successors, (59) [2022-12-14 07:22:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:19,798 INFO L93 Difference]: Finished difference Result 74505 states and 134002 transitions. [2022-12-14 07:22:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-12-14 07:22:19,799 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 25 states have internal predecessors, (167), 16 states have call successors, (58), 7 states have call predecessors, (58), 15 states have return successors, (59), 19 states have call predecessors, (59), 16 states have call successors, (59) Word has length 170 [2022-12-14 07:22:19,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:20,040 INFO L225 Difference]: With dead ends: 74505 [2022-12-14 07:22:20,041 INFO L226 Difference]: Without dead ends: 52016 [2022-12-14 07:22:20,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 429 SyntacticMatches, 12 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12368 ImplicationChecksByTransitivity, 69.0s TimeCoverageRelationStatistics Valid=2072, Invalid=28728, Unknown=0, NotChecked=0, Total=30800 [2022-12-14 07:22:20,240 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 7571 mSDsluCounter, 6779 mSDsCounter, 0 mSdLazyCounter, 22328 mSolverCounterSat, 4911 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7571 SdHoareTripleChecker+Valid, 7398 SdHoareTripleChecker+Invalid, 27239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4911 IncrementalHoareTripleChecker+Valid, 22328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:20,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7571 Valid, 7398 Invalid, 27239 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4911 Valid, 22328 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-12-14 07:22:20,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52016 states. [2022-12-14 07:22:23,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52016 to 44692. [2022-12-14 07:22:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44692 states, 31645 states have (on average 1.419718754937589) internal successors, (44927), 33382 states have internal predecessors, (44927), 9366 states have call successors, (9366), 2876 states have call predecessors, (9366), 3680 states have return successors, (17312), 9191 states have call predecessors, (17312), 9327 states have call successors, (17312) [2022-12-14 07:22:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44692 states to 44692 states and 71605 transitions. [2022-12-14 07:22:23,659 INFO L78 Accepts]: Start accepts. Automaton has 44692 states and 71605 transitions. Word has length 170 [2022-12-14 07:22:23,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:23,660 INFO L495 AbstractCegarLoop]: Abstraction has 44692 states and 71605 transitions. [2022-12-14 07:22:23,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 25 states have internal predecessors, (167), 16 states have call successors, (58), 7 states have call predecessors, (58), 15 states have return successors, (59), 19 states have call predecessors, (59), 16 states have call successors, (59) [2022-12-14 07:22:23,660 INFO L276 IsEmpty]: Start isEmpty. Operand 44692 states and 71605 transitions. [2022-12-14 07:22:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-12-14 07:22:23,666 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:23,666 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 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] [2022-12-14 07:22:23,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 07:22:23,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:22:23,868 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:22:23,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:23,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1569829116, now seen corresponding path program 1 times [2022-12-14 07:22:23,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:23,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325553568] [2022-12-14 07:22:23,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:23,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 07:22:23,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:23,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325553568] [2022-12-14 07:22:23,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325553568] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:22:23,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656889114] [2022-12-14 07:22:23,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:23,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:22:23,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:22:24,000 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:22:24,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 07:22:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:24,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 2501 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 07:22:24,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:22:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 07:22:24,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 07:22:24,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656889114] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:24,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 07:22:24,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-12-14 07:22:24,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402465947] [2022-12-14 07:22:24,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:24,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:22:24,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:24,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:22:24,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:22:24,283 INFO L87 Difference]: Start difference. First operand 44692 states and 71605 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 07:22:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:27,973 INFO L93 Difference]: Finished difference Result 89332 states and 148213 transitions. [2022-12-14 07:22:27,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:22:27,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 181 [2022-12-14 07:22:27,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:28,255 INFO L225 Difference]: With dead ends: 89332 [2022-12-14 07:22:28,255 INFO L226 Difference]: Without dead ends: 46637 [2022-12-14 07:22:28,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 07:22:28,480 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 56 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1172 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:28,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 1172 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:22:28,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46637 states. [2022-12-14 07:22:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46637 to 46200. [2022-12-14 07:22:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46200 states, 33173 states have (on average 1.4177192294938654) internal successors, (47030), 34914 states have internal predecessors, (47030), 9342 states have call successors, (9342), 2876 states have call predecessors, (9342), 3684 states have return successors, (17314), 9167 states have call predecessors, (17314), 9303 states have call successors, (17314) [2022-12-14 07:22:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46200 states to 46200 states and 73686 transitions. [2022-12-14 07:22:31,871 INFO L78 Accepts]: Start accepts. Automaton has 46200 states and 73686 transitions. Word has length 181 [2022-12-14 07:22:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:31,872 INFO L495 AbstractCegarLoop]: Abstraction has 46200 states and 73686 transitions. [2022-12-14 07:22:31,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2022-12-14 07:22:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 46200 states and 73686 transitions. [2022-12-14 07:22:31,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-12-14 07:22:31,877 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:31,878 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:31,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 07:22:32,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:22:32,079 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:22:32,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:32,080 INFO L85 PathProgramCache]: Analyzing trace with hash 669901373, now seen corresponding path program 1 times [2022-12-14 07:22:32,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:32,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606222518] [2022-12-14 07:22:32,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:32,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-14 07:22:32,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:32,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606222518] [2022-12-14 07:22:32,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606222518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:32,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:32,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:22:32,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324299111] [2022-12-14 07:22:32,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:32,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:22:32,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:32,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:22:32,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:22:32,297 INFO L87 Difference]: Start difference. First operand 46200 states and 73686 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 07:22:35,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:35,755 INFO L93 Difference]: Finished difference Result 81964 states and 132094 transitions. [2022-12-14 07:22:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:22:35,756 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) Word has length 186 [2022-12-14 07:22:35,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:35,983 INFO L225 Difference]: With dead ends: 81964 [2022-12-14 07:22:35,983 INFO L226 Difference]: Without dead ends: 47221 [2022-12-14 07:22:36,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:22:36,155 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 6 mSDsluCounter, 2912 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:36,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3503 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:22:36,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47221 states. [2022-12-14 07:22:39,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47221 to 47005. [2022-12-14 07:22:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47005 states, 33709 states have (on average 1.4110771604022665) internal successors, (47566), 35554 states have internal predecessors, (47566), 9342 states have call successors, (9342), 2876 states have call predecessors, (9342), 3953 states have return successors, (17815), 9332 states have call predecessors, (17815), 9303 states have call successors, (17815) [2022-12-14 07:22:40,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47005 states to 47005 states and 74723 transitions. [2022-12-14 07:22:40,010 INFO L78 Accepts]: Start accepts. Automaton has 47005 states and 74723 transitions. Word has length 186 [2022-12-14 07:22:40,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:40,010 INFO L495 AbstractCegarLoop]: Abstraction has 47005 states and 74723 transitions. [2022-12-14 07:22:40,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 07:22:40,010 INFO L276 IsEmpty]: Start isEmpty. Operand 47005 states and 74723 transitions. [2022-12-14 07:22:40,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-12-14 07:22:40,015 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:40,016 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:40,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-14 07:22:40,016 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:22:40,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:40,016 INFO L85 PathProgramCache]: Analyzing trace with hash 605440547, now seen corresponding path program 2 times [2022-12-14 07:22:40,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:40,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919196857] [2022-12-14 07:22:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:40,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-14 07:22:40,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:40,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919196857] [2022-12-14 07:22:40,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919196857] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:40,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:40,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:22:40,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052440474] [2022-12-14 07:22:40,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:40,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:22:40,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:40,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:22:40,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:22:40,192 INFO L87 Difference]: Start difference. First operand 47005 states and 74723 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 07:22:43,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:43,947 INFO L93 Difference]: Finished difference Result 83210 states and 133689 transitions. [2022-12-14 07:22:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:22:43,948 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) Word has length 186 [2022-12-14 07:22:43,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:44,225 INFO L225 Difference]: With dead ends: 83210 [2022-12-14 07:22:44,225 INFO L226 Difference]: Without dead ends: 47782 [2022-12-14 07:22:44,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:22:44,446 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 6 mSDsluCounter, 2912 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:44,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3503 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:22:44,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47782 states. [2022-12-14 07:22:47,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47782 to 47060. [2022-12-14 07:22:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47060 states, 33768 states have (on average 1.410358919687278) internal successors, (47625), 35546 states have internal predecessors, (47625), 9342 states have call successors, (9342), 2876 states have call predecessors, (9342), 3949 states have return successors, (17807), 9395 states have call predecessors, (17807), 9303 states have call successors, (17807) [2022-12-14 07:22:48,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47060 states to 47060 states and 74774 transitions. [2022-12-14 07:22:48,017 INFO L78 Accepts]: Start accepts. Automaton has 47060 states and 74774 transitions. Word has length 186 [2022-12-14 07:22:48,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:48,017 INFO L495 AbstractCegarLoop]: Abstraction has 47060 states and 74774 transitions. [2022-12-14 07:22:48,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 07:22:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 47060 states and 74774 transitions. [2022-12-14 07:22:48,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-12-14 07:22:48,023 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:48,023 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:22:48,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 07:22:48,023 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:22:48,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:48,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1930096783, now seen corresponding path program 1 times [2022-12-14 07:22:48,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:48,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130473618] [2022-12-14 07:22:48,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:48,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-12-14 07:22:48,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:48,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130473618] [2022-12-14 07:22:48,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130473618] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:22:48,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:22:48,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 07:22:48,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81394225] [2022-12-14 07:22:48,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:22:48,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 07:22:48,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:22:48,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 07:22:48,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:22:48,198 INFO L87 Difference]: Start difference. First operand 47060 states and 74774 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 07:22:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:22:51,915 INFO L93 Difference]: Finished difference Result 82999 states and 133258 transitions. [2022-12-14 07:22:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 07:22:51,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) Word has length 187 [2022-12-14 07:22:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:22:52,146 INFO L225 Difference]: With dead ends: 82999 [2022-12-14 07:22:52,146 INFO L226 Difference]: Without dead ends: 47516 [2022-12-14 07:22:52,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 07:22:52,327 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 6 mSDsluCounter, 2920 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3513 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:22:52,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3513 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:22:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47516 states. [2022-12-14 07:22:55,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47516 to 46818. [2022-12-14 07:22:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46818 states, 33635 states have (on average 1.4101977107180022) internal successors, (47432), 35301 states have internal predecessors, (47432), 9309 states have call successors, (9309), 2876 states have call predecessors, (9309), 3873 states have return successors, (17585), 9398 states have call predecessors, (17585), 9270 states have call successors, (17585) [2022-12-14 07:22:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46818 states to 46818 states and 74326 transitions. [2022-12-14 07:22:55,798 INFO L78 Accepts]: Start accepts. Automaton has 46818 states and 74326 transitions. Word has length 187 [2022-12-14 07:22:55,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:22:55,799 INFO L495 AbstractCegarLoop]: Abstraction has 46818 states and 74326 transitions. [2022-12-14 07:22:55,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (28), 2 states have call predecessors, (28), 4 states have return successors, (27), 4 states have call predecessors, (27), 2 states have call successors, (27) [2022-12-14 07:22:55,799 INFO L276 IsEmpty]: Start isEmpty. Operand 46818 states and 74326 transitions. [2022-12-14 07:22:55,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-12-14 07:22:55,810 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:22:55,810 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 07:22:55,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-14 07:22:55,811 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:22:55,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:22:55,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1292655336, now seen corresponding path program 1 times [2022-12-14 07:22:55,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:22:55,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492345300] [2022-12-14 07:22:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:55,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:22:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-12-14 07:22:56,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:22:56,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492345300] [2022-12-14 07:22:56,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492345300] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:22:56,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839695535] [2022-12-14 07:22:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:22:56,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:22:56,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:22:56,117 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:22:56,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 07:22:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:22:56,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 2621 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 07:22:56,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:22:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 49 proven. 3 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-12-14 07:22:56,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:22:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 35 proven. 1 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-12-14 07:22:56,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839695535] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:22:56,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7253821] [2022-12-14 07:22:56,743 INFO L159 IcfgInterpreter]: Started Sifa with 143 locations of interest [2022-12-14 07:22:56,743 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:22:56,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:22:56,744 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:22:56,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:23:02,875 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 675 for LOIs [2022-12-14 07:23:07,637 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 25 for LOIs [2022-12-14 07:23:07,639 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__twothirdsfull with input of size 199 for LOIs [2022-12-14 07:23:09,987 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 52 for LOIs [2022-12-14 07:23:10,354 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 110 for LOIs [2022-12-14 07:23:11,207 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 73 for LOIs [2022-12-14 07:23:11,214 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 67 for LOIs [2022-12-14 07:23:11,228 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 54 for LOIs [2022-12-14 07:23:11,240 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2022-12-14 07:23:13,255 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2022-12-14 07:23:13,447 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 50 for LOIs [2022-12-14 07:23:13,451 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 77 for LOIs [2022-12-14 07:23:13,494 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 67 for LOIs [2022-12-14 07:23:13,501 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 48 for LOIs [2022-12-14 07:23:13,507 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2022-12-14 07:23:16,776 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 07:23:17,332 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 07:23:17,470 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:24:39,845 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1716643#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 07:24:39,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:24:39,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:24:39,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-12-14 07:24:39,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60422671] [2022-12-14 07:24:39,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:24:39,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 07:24:39,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:24:39,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 07:24:39,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=17808, Unknown=0, NotChecked=0, Total=18632 [2022-12-14 07:24:39,853 INFO L87 Difference]: Start difference. First operand 46818 states and 74326 transitions. Second operand has 19 states, 17 states have (on average 11.705882352941176) internal successors, (199), 17 states have internal predecessors, (199), 13 states have call successors, (65), 7 states have call predecessors, (65), 8 states have return successors, (65), 16 states have call predecessors, (65), 13 states have call successors, (65) [2022-12-14 07:25:02,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:25:02,662 INFO L93 Difference]: Finished difference Result 185057 states and 342853 transitions. [2022-12-14 07:25:02,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-14 07:25:02,663 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 11.705882352941176) internal successors, (199), 17 states have internal predecessors, (199), 13 states have call successors, (65), 7 states have call predecessors, (65), 8 states have return successors, (65), 16 states have call predecessors, (65), 13 states have call successors, (65) Word has length 219 [2022-12-14 07:25:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:25:03,607 INFO L225 Difference]: With dead ends: 185057 [2022-12-14 07:25:03,607 INFO L226 Difference]: Without dead ends: 141140 [2022-12-14 07:25:04,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 553 SyntacticMatches, 16 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16944 ImplicationChecksByTransitivity, 83.7s TimeCoverageRelationStatistics Valid=1734, Invalid=38868, Unknown=0, NotChecked=0, Total=40602 [2022-12-14 07:25:04,096 INFO L413 NwaCegarLoop]: 1174 mSDtfsCounter, 8889 mSDsluCounter, 7110 mSDsCounter, 0 mSdLazyCounter, 19275 mSolverCounterSat, 6957 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8905 SdHoareTripleChecker+Valid, 8284 SdHoareTripleChecker+Invalid, 26232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6957 IncrementalHoareTripleChecker+Valid, 19275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-12-14 07:25:04,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8905 Valid, 8284 Invalid, 26232 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6957 Valid, 19275 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2022-12-14 07:25:04,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141140 states. [2022-12-14 07:25:14,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141140 to 117669. [2022-12-14 07:25:14,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117669 states, 79967 states have (on average 1.388135105731114) internal successors, (111005), 86224 states have internal predecessors, (111005), 28910 states have call successors, (28910), 6730 states have call predecessors, (28910), 8791 states have return successors, (59452), 27739 states have call predecessors, (59452), 28830 states have call successors, (59452) [2022-12-14 07:25:15,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117669 states to 117669 states and 199367 transitions. [2022-12-14 07:25:15,659 INFO L78 Accepts]: Start accepts. Automaton has 117669 states and 199367 transitions. Word has length 219 [2022-12-14 07:25:15,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:25:15,660 INFO L495 AbstractCegarLoop]: Abstraction has 117669 states and 199367 transitions. [2022-12-14 07:25:15,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 11.705882352941176) internal successors, (199), 17 states have internal predecessors, (199), 13 states have call successors, (65), 7 states have call predecessors, (65), 8 states have return successors, (65), 16 states have call predecessors, (65), 13 states have call successors, (65) [2022-12-14 07:25:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 117669 states and 199367 transitions. [2022-12-14 07:25:15,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-12-14 07:25:15,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:25:15,674 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:25:15,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 07:25:15,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 07:25:15,875 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:25:15,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:25:15,875 INFO L85 PathProgramCache]: Analyzing trace with hash -117018007, now seen corresponding path program 1 times [2022-12-14 07:25:15,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:25:15,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207143898] [2022-12-14 07:25:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:15,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:25:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 07:25:16,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:25:16,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207143898] [2022-12-14 07:25:16,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207143898] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:25:16,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067988486] [2022-12-14 07:25:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:25:16,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:25:16,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:25:16,122 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:25:16,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 07:25:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:25:16,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 2536 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 07:25:16,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:25:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 07:25:16,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:25:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-14 07:25:16,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067988486] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:25:16,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1597096600] [2022-12-14 07:25:16,656 INFO L159 IcfgInterpreter]: Started Sifa with 132 locations of interest [2022-12-14 07:25:16,656 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:25:16,656 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:25:16,656 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:25:16,656 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:25:23,009 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 679 for LOIs [2022-12-14 07:25:29,127 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 25 for LOIs [2022-12-14 07:25:29,129 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__twothirdsfull with input of size 50 for LOIs [2022-12-14 07:25:29,668 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 53 for LOIs [2022-12-14 07:25:30,049 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 68 for LOIs [2022-12-14 07:25:30,950 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 62 for LOIs [2022-12-14 07:25:30,953 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 63 for LOIs [2022-12-14 07:25:30,966 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 87 for LOIs [2022-12-14 07:25:30,985 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2022-12-14 07:25:32,969 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2022-12-14 07:25:33,165 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 42 for LOIs [2022-12-14 07:25:33,169 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 67 for LOIs [2022-12-14 07:25:33,191 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 48 for LOIs [2022-12-14 07:25:33,198 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2022-12-14 07:25:36,468 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 07:25:37,025 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 07:25:37,163 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:26:51,793 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2140270#(and (= ~currentHeading~0 0) (= ~head~0.offset 0) (= ~expectedDirection~0 1) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~blocked~0 0) (<= 0 |#StackHeapBarrier|) (= ~maximumWeight~0 100) (= ~cleanupTimeShifts~0 12) (= |#NULL.base| 0))' at error location [2022-12-14 07:26:51,793 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 07:26:51,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:26:51,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 15 [2022-12-14 07:26:51,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837125533] [2022-12-14 07:26:51,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 07:26:51,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 07:26:51,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:26:51,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 07:26:51,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=919, Invalid=13601, Unknown=0, NotChecked=0, Total=14520 [2022-12-14 07:26:51,797 INFO L87 Difference]: Start difference. First operand 117669 states and 199367 transitions. Second operand has 15 states, 13 states have (on average 9.615384615384615) internal successors, (125), 13 states have internal predecessors, (125), 5 states have call successors, (38), 5 states have call predecessors, (38), 7 states have return successors, (37), 8 states have call predecessors, (37), 5 states have call successors, (37) [2022-12-14 07:27:12,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:27:12,450 INFO L93 Difference]: Finished difference Result 276285 states and 496852 transitions. [2022-12-14 07:27:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 07:27:12,452 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 9.615384615384615) internal successors, (125), 13 states have internal predecessors, (125), 5 states have call successors, (38), 5 states have call predecessors, (38), 7 states have return successors, (37), 8 states have call predecessors, (37), 5 states have call successors, (37) Word has length 196 [2022-12-14 07:27:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:27:13,679 INFO L225 Difference]: With dead ends: 276285 [2022-12-14 07:27:13,679 INFO L226 Difference]: Without dead ends: 169857 [2022-12-14 07:27:15,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 472 SyntacticMatches, 12 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7261 ImplicationChecksByTransitivity, 75.5s TimeCoverageRelationStatistics Valid=1097, Invalid=18363, Unknown=0, NotChecked=0, Total=19460 [2022-12-14 07:27:15,054 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 2457 mSDsluCounter, 2288 mSDsCounter, 0 mSdLazyCounter, 6404 mSolverCounterSat, 1264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2475 SdHoareTripleChecker+Valid, 2840 SdHoareTripleChecker+Invalid, 7668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1264 IncrementalHoareTripleChecker+Valid, 6404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 07:27:15,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2475 Valid, 2840 Invalid, 7668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1264 Valid, 6404 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 07:27:15,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169857 states. [2022-12-14 07:27:28,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169857 to 155774. [2022-12-14 07:27:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155774 states, 105739 states have (on average 1.38020976177191) internal successors, (145942), 113655 states have internal predecessors, (145942), 38149 states have call successors, (38149), 9651 states have call predecessors, (38149), 11885 states have return successors, (78608), 36489 states have call predecessors, (78608), 38024 states have call successors, (78608) [2022-12-14 07:27:30,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155774 states to 155774 states and 262699 transitions. [2022-12-14 07:27:30,263 INFO L78 Accepts]: Start accepts. Automaton has 155774 states and 262699 transitions. Word has length 196 [2022-12-14 07:27:30,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:27:30,263 INFO L495 AbstractCegarLoop]: Abstraction has 155774 states and 262699 transitions. [2022-12-14 07:27:30,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 9.615384615384615) internal successors, (125), 13 states have internal predecessors, (125), 5 states have call successors, (38), 5 states have call predecessors, (38), 7 states have return successors, (37), 8 states have call predecessors, (37), 5 states have call successors, (37) [2022-12-14 07:27:30,264 INFO L276 IsEmpty]: Start isEmpty. Operand 155774 states and 262699 transitions. [2022-12-14 07:27:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-12-14 07:27:30,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:27:30,283 INFO L195 NwaCegarLoop]: trace histogram [7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:27:30,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 07:27:30,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 07:27:30,485 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 07:27:30,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:27:30,486 INFO L85 PathProgramCache]: Analyzing trace with hash -825701866, now seen corresponding path program 1 times [2022-12-14 07:27:30,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:27:30,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748021410] [2022-12-14 07:27:30,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:27:30,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:27:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:27:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-12-14 07:27:31,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:27:31,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748021410] [2022-12-14 07:27:31,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748021410] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 07:27:31,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438438347] [2022-12-14 07:27:31,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:27:31,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 07:27:31,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:27:31,088 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 07:27:31,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d1f3b431-84c3-44d8-becd-121236957fce/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 07:27:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:27:31,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 2555 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 07:27:31,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 07:27:31,430 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 07:27:31,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 07:27:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 07:27:31,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438438347] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 07:27:31,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [836732978] [2022-12-14 07:27:31,951 INFO L159 IcfgInterpreter]: Started Sifa with 135 locations of interest [2022-12-14 07:27:31,951 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 07:27:31,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 07:27:31,952 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 07:27:31,952 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 07:27:37,880 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 679 for LOIs [2022-12-14 07:27:44,203 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift__wrappee__twothirdsfull with input of size 245 for LOIs [2022-12-14 07:27:45,907 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 59 for LOIs [2022-12-14 07:27:46,229 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 70 for LOIs [2022-12-14 07:27:47,446 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 48 for LOIs [2022-12-14 07:27:47,455 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 69 for LOIs [2022-12-14 07:27:47,469 INFO L197 IcfgInterpreter]: Interpreting procedure initTopDown with input of size 605 for LOIs [2022-12-14 07:27:49,458 INFO L197 IcfgInterpreter]: Interpreting procedure initFloors with input of size 579 for LOIs [2022-12-14 07:27:49,651 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 60 for LOIs [2022-12-14 07:27:49,657 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 80 for LOIs [2022-12-14 07:27:49,817 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 72 for LOIs [2022-12-14 07:27:49,824 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentHeading with input of size 38 for LOIs [2022-12-14 07:27:49,826 INFO L197 IcfgInterpreter]: Interpreting procedure bobCall with input of size 579 for LOIs [2022-12-14 07:27:53,077 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 583 for LOIs [2022-12-14 07:27:53,637 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 511 for LOIs [2022-12-14 07:27:53,776 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 07:29:11,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [836732978] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:29:11,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 07:29:11,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [14, 9, 10] total 119 [2022-12-14 07:29:11,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466309698] [2022-12-14 07:29:11,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:29:11,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-12-14 07:29:11,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:29:11,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-12-14 07:29:11,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1067, Invalid=12975, Unknown=0, NotChecked=0, Total=14042 [2022-12-14 07:29:11,896 INFO L87 Difference]: Start difference. First operand 155774 states and 262699 transitions. Second operand has 99 states, 75 states have (on average 1.28) internal successors, (96), 68 states have internal predecessors, (96), 27 states have call successors, (28), 14 states have call predecessors, (28), 15 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-12-14 07:29:42,176 WARN L233 SmtUtils]: Spent 5.24s on a formula simplification. DAG size of input: 677 DAG size of output: 634 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 07:29:47,878 WARN L233 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 677 DAG size of output: 634 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)