./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/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_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/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_52a015ba-2fb1-48c1-894a-ee05b47d1e57/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 b02d53de4cc8dbaebc187e8fa236234211af4eca5416c7869304d04f0d61a0bd --- 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 15:27:06,027 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 15:27:06,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 15:27:06,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 15:27:06,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 15:27:06,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 15:27:06,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 15:27:06,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 15:27:06,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 15:27:06,054 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 15:27:06,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 15:27:06,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 15:27:06,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 15:27:06,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 15:27:06,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 15:27:06,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 15:27:06,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 15:27:06,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 15:27:06,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 15:27:06,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 15:27:06,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 15:27:06,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 15:27:06,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 15:27:06,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 15:27:06,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 15:27:06,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 15:27:06,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 15:27:06,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 15:27:06,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 15:27:06,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 15:27:06,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 15:27:06,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 15:27:06,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 15:27:06,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 15:27:06,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 15:27:06,076 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 15:27:06,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 15:27:06,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 15:27:06,077 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 15:27:06,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 15:27:06,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 15:27:06,079 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 15:27:06,098 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 15:27:06,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 15:27:06,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 15:27:06,099 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 15:27:06,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 15:27:06,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 15:27:06,100 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 15:27:06,100 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 15:27:06,100 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 15:27:06,100 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 15:27:06,105 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 15:27:06,105 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 15:27:06,105 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 15:27:06,105 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 15:27:06,106 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 15:27:06,106 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 15:27:06,106 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 15:27:06,106 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 15:27:06,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 15:27:06,107 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 15:27:06,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 15:27:06,108 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 15:27:06,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 15:27:06,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 15:27:06,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 15:27:06,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 15:27:06,108 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 15:27:06,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 15:27:06,109 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 15:27:06,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 15:27:06,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 15:27:06,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 15:27:06,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:27:06,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 15:27:06,110 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 15:27:06,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 15:27:06,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 15:27:06,110 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 15:27:06,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 15:27:06,111 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 15:27:06,111 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 15:27:06,111 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_52a015ba-2fb1-48c1-894a-ee05b47d1e57/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b02d53de4cc8dbaebc187e8fa236234211af4eca5416c7869304d04f0d61a0bd [2022-12-14 15:27:06,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 15:27:06,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 15:27:06,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 15:27:06,297 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 15:27:06,297 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 15:27:06,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c [2022-12-14 15:27:08,862 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 15:27:09,102 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 15:27:09,103 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c [2022-12-14 15:27:09,115 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/data/77a8cca7c/dbb87f4670c24a3d9d0804aed0c44be2/FLAG4f86a9860 [2022-12-14 15:27:09,125 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/data/77a8cca7c/dbb87f4670c24a3d9d0804aed0c44be2 [2022-12-14 15:27:09,127 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 15:27:09,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 15:27:09,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 15:27:09,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 15:27:09,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 15:27:09,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:27:09" (1/1) ... [2022-12-14 15:27:09,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518d2917 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:09, skipping insertion in model container [2022-12-14 15:27:09,133 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:27:09" (1/1) ... [2022-12-14 15:27:09,138 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 15:27:09,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 15:27:09,424 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_52a015ba-2fb1-48c1-894a-ee05b47d1e57/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c[40071,40084] [2022-12-14 15:27:09,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:27:09,491 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 15:27:09,534 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_52a015ba-2fb1-48c1-894a-ee05b47d1e57/sv-benchmarks/c/product-lines/elevator_spec2_product21.cil.c[40071,40084] [2022-12-14 15:27:09,581 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 15:27:09,612 INFO L208 MainTranslator]: Completed translation [2022-12-14 15:27:09,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:09 WrapperNode [2022-12-14 15:27:09,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 15:27:09,614 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 15:27:09,614 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 15:27:09,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 15:27:09,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:09" (1/1) ... [2022-12-14 15:27:09,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:09" (1/1) ... [2022-12-14 15:27:09,665 INFO L138 Inliner]: procedures = 92, calls = 339, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 861 [2022-12-14 15:27:09,665 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 15:27:09,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 15:27:09,666 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 15:27:09,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 15:27:09,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:09" (1/1) ... [2022-12-14 15:27:09,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:09" (1/1) ... [2022-12-14 15:27:09,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:09" (1/1) ... [2022-12-14 15:27:09,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:09" (1/1) ... [2022-12-14 15:27:09,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:09" (1/1) ... [2022-12-14 15:27:09,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:09" (1/1) ... [2022-12-14 15:27:09,698 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:09" (1/1) ... [2022-12-14 15:27:09,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:09" (1/1) ... [2022-12-14 15:27:09,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 15:27:09,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 15:27:09,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 15:27:09,707 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 15:27:09,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:09" (1/1) ... [2022-12-14 15:27:09,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 15:27:09,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:27:09,733 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 15:27:09,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 15:27:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 15:27:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-12-14 15:27:09,769 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-12-14 15:27:09,769 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-12-14 15:27:09,770 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-12-14 15:27:09,770 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-12-14 15:27:09,770 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-12-14 15:27:09,770 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-12-14 15:27:09,770 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-12-14 15:27:09,770 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-12-14 15:27:09,770 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-12-14 15:27:09,771 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-12-14 15:27:09,771 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-12-14 15:27:09,771 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-12-14 15:27:09,771 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-12-14 15:27:09,771 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-12-14 15:27:09,771 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-12-14 15:27:09,771 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-12-14 15:27:09,771 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-12-14 15:27:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-12-14 15:27:09,772 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-12-14 15:27:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-12-14 15:27:09,772 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-12-14 15:27:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-12-14 15:27:09,772 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-12-14 15:27:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-12-14 15:27:09,773 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-12-14 15:27:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-12-14 15:27:09,773 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-12-14 15:27:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-12-14 15:27:09,773 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-12-14 15:27:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-12-14 15:27:09,773 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-12-14 15:27:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-12-14 15:27:09,774 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-12-14 15:27:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-12-14 15:27:09,774 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-12-14 15:27:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 15:27:09,774 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-12-14 15:27:09,774 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-12-14 15:27:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-12-14 15:27:09,775 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-12-14 15:27:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-12-14 15:27:09,775 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-12-14 15:27:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-12-14 15:27:09,775 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-12-14 15:27:09,775 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 15:27:09,775 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2022-12-14 15:27:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 15:27:09,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 15:27:09,776 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-12-14 15:27:09,776 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-12-14 15:27:09,883 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 15:27:09,885 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 15:27:10,603 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 15:27:11,116 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 15:27:11,116 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 15:27:11,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:27:11 BoogieIcfgContainer [2022-12-14 15:27:11,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 15:27:11,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 15:27:11,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 15:27:11,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 15:27:11,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:27:09" (1/3) ... [2022-12-14 15:27:11,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112f335c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:27:11, skipping insertion in model container [2022-12-14 15:27:11,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:27:09" (2/3) ... [2022-12-14 15:27:11,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@112f335c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:27:11, skipping insertion in model container [2022-12-14 15:27:11,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:27:11" (3/3) ... [2022-12-14 15:27:11,126 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product21.cil.c [2022-12-14 15:27:11,141 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 15:27:11,141 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 15:27:11,184 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 15:27:11,188 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;@285e0611, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 15:27:11,188 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 15:27:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand has 374 states, 253 states have (on average 1.5968379446640317) internal successors, (404), 274 states have internal predecessors, (404), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-12-14 15:27:11,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 15:27:11,207 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:27:11,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:27:11,207 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:27:11,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:27:11,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1097568117, now seen corresponding path program 1 times [2022-12-14 15:27:11,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:27:11,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366285384] [2022-12-14 15:27:11,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:27:11,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:27:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:27:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:27:11,629 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:27:11,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366285384] [2022-12-14 15:27:11,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366285384] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:27:11,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:27:11,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 15:27:11,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536322649] [2022-12-14 15:27:11,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:27:11,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 15:27:11,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:27:11,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 15:27:11,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 15:27:11,662 INFO L87 Difference]: Start difference. First operand has 374 states, 253 states have (on average 1.5968379446640317) internal successors, (404), 274 states have internal predecessors, (404), 95 states have call successors, (95), 24 states have call predecessors, (95), 24 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 15:27:12,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:27:12,079 INFO L93 Difference]: Finished difference Result 844 states and 1368 transitions. [2022-12-14 15:27:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:27:12,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 65 [2022-12-14 15:27:12,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:27:12,092 INFO L225 Difference]: With dead ends: 844 [2022-12-14 15:27:12,092 INFO L226 Difference]: Without dead ends: 483 [2022-12-14 15:27:12,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:27:12,099 INFO L413 NwaCegarLoop]: 650 mSDtfsCounter, 282 mSDsluCounter, 1672 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2322 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:27:12,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 2322 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:27:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-12-14 15:27:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 373. [2022-12-14 15:27:12,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 254 states have (on average 1.578740157480315) internal successors, (401), 273 states have internal predecessors, (401), 95 states have call successors, (95), 24 states have call predecessors, (95), 23 states have return successors, (90), 88 states have call predecessors, (90), 90 states have call successors, (90) [2022-12-14 15:27:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 586 transitions. [2022-12-14 15:27:12,153 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 586 transitions. Word has length 65 [2022-12-14 15:27:12,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:27:12,154 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 586 transitions. [2022-12-14 15:27:12,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 15:27:12,154 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 586 transitions. [2022-12-14 15:27:12,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 15:27:12,157 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:27:12,158 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] [2022-12-14 15:27:12,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 15:27:12,158 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:27:12,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:27:12,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2096145610, now seen corresponding path program 1 times [2022-12-14 15:27:12,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:27:12,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368784053] [2022-12-14 15:27:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:27:12,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:27:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:27:12,386 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 15:27:12,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:27:12,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368784053] [2022-12-14 15:27:12,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368784053] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:27:12,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:27:12,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 15:27:12,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586662385] [2022-12-14 15:27:12,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:27:12,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 15:27:12,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:27:12,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 15:27:12,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-12-14 15:27:12,390 INFO L87 Difference]: Start difference. First operand 373 states and 586 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 15:27:14,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:27:14,570 INFO L93 Difference]: Finished difference Result 1280 states and 2045 transitions. [2022-12-14 15:27:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 15:27:14,570 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 68 [2022-12-14 15:27:14,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:27:14,578 INFO L225 Difference]: With dead ends: 1280 [2022-12-14 15:27:14,578 INFO L226 Difference]: Without dead ends: 923 [2022-12-14 15:27:14,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-12-14 15:27:14,582 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 1733 mSDsluCounter, 2128 mSDsCounter, 0 mSdLazyCounter, 3918 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1799 SdHoareTripleChecker+Valid, 2525 SdHoareTripleChecker+Invalid, 4504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 3918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:27:14,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1799 Valid, 2525 Invalid, 4504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 3918 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 15:27:14,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-12-14 15:27:14,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 867. [2022-12-14 15:27:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 611 states have (on average 1.5973813420621932) internal successors, (976), 642 states have internal predecessors, (976), 203 states have call successors, (203), 48 states have call predecessors, (203), 52 states have return successors, (210), 201 states have call predecessors, (210), 198 states have call successors, (210) [2022-12-14 15:27:14,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1389 transitions. [2022-12-14 15:27:14,648 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1389 transitions. Word has length 68 [2022-12-14 15:27:14,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:27:14,649 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1389 transitions. [2022-12-14 15:27:14,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 15:27:14,649 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1389 transitions. [2022-12-14 15:27:14,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 15:27:14,651 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:27:14,651 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] [2022-12-14 15:27:14,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 15:27:14,652 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:27:14,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:27:14,652 INFO L85 PathProgramCache]: Analyzing trace with hash -440375437, now seen corresponding path program 1 times [2022-12-14 15:27:14,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:27:14,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691952582] [2022-12-14 15:27:14,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:27:14,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:27:14,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:27:15,424 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 15:27:15,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:27:15,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691952582] [2022-12-14 15:27:15,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691952582] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:27:15,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:27:15,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 15:27:15,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700225436] [2022-12-14 15:27:15,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:27:15,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:27:15,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:27:15,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:27:15,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:27:15,427 INFO L87 Difference]: Start difference. First operand 867 states and 1389 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 15:27:18,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:27:18,227 INFO L93 Difference]: Finished difference Result 3556 states and 5794 transitions. [2022-12-14 15:27:18,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 15:27:18,228 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 73 [2022-12-14 15:27:18,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:27:18,240 INFO L225 Difference]: With dead ends: 3556 [2022-12-14 15:27:18,240 INFO L226 Difference]: Without dead ends: 2706 [2022-12-14 15:27:18,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:27:18,244 INFO L413 NwaCegarLoop]: 523 mSDtfsCounter, 2161 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 3185 mSolverCounterSat, 928 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2233 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 4113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 928 IncrementalHoareTripleChecker+Valid, 3185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:27:18,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2233 Valid, 1674 Invalid, 4113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [928 Valid, 3185 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 15:27:18,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2022-12-14 15:27:18,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 2502. [2022-12-14 15:27:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 1794 states have (on average 1.596432552954292) internal successors, (2864), 1885 states have internal predecessors, (2864), 563 states have call successors, (563), 128 states have call predecessors, (563), 144 states have return successors, (614), 549 states have call predecessors, (614), 558 states have call successors, (614) [2022-12-14 15:27:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 4041 transitions. [2022-12-14 15:27:18,413 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 4041 transitions. Word has length 73 [2022-12-14 15:27:18,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:27:18,413 INFO L495 AbstractCegarLoop]: Abstraction has 2502 states and 4041 transitions. [2022-12-14 15:27:18,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 6 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 15:27:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 4041 transitions. [2022-12-14 15:27:18,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 15:27:18,415 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:27:18,415 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] [2022-12-14 15:27:18,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 15:27:18,415 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:27:18,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:27:18,415 INFO L85 PathProgramCache]: Analyzing trace with hash 958952201, now seen corresponding path program 1 times [2022-12-14 15:27:18,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:27:18,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359943770] [2022-12-14 15:27:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:27:18,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:27:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:27:18,559 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 15:27:18,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:27:18,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359943770] [2022-12-14 15:27:18,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359943770] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:27:18,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:27:18,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 15:27:18,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050960949] [2022-12-14 15:27:18,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:27:18,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:27:18,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:27:18,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:27:18,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:27:18,561 INFO L87 Difference]: Start difference. First operand 2502 states and 4041 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 15:27:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:27:18,914 INFO L93 Difference]: Finished difference Result 4303 states and 6959 transitions. [2022-12-14 15:27:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:27:18,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 72 [2022-12-14 15:27:18,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:27:18,924 INFO L225 Difference]: With dead ends: 4303 [2022-12-14 15:27:18,924 INFO L226 Difference]: Without dead ends: 2769 [2022-12-14 15:27:18,929 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 15:27:18,930 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 41 mSDsluCounter, 2905 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:27:18,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 3503 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:27:18,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2022-12-14 15:27:19,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 2575. [2022-12-14 15:27:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 1845 states have (on average 1.5799457994579946) internal successors, (2915), 1938 states have internal predecessors, (2915), 563 states have call successors, (563), 128 states have call predecessors, (563), 166 states have return successors, (661), 569 states have call predecessors, (661), 558 states have call successors, (661) [2022-12-14 15:27:19,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 4139 transitions. [2022-12-14 15:27:19,085 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 4139 transitions. Word has length 72 [2022-12-14 15:27:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:27:19,085 INFO L495 AbstractCegarLoop]: Abstraction has 2575 states and 4139 transitions. [2022-12-14 15:27:19,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 15:27:19,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 4139 transitions. [2022-12-14 15:27:19,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 15:27:19,086 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:27:19,087 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] [2022-12-14 15:27:19,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 15:27:19,087 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:27:19,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:27:19,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1682650451, now seen corresponding path program 1 times [2022-12-14 15:27:19,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:27:19,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741216513] [2022-12-14 15:27:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:27:19,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:27:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:27:19,252 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 15:27:19,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:27:19,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741216513] [2022-12-14 15:27:19,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741216513] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:27:19,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:27:19,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 15:27:19,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054193671] [2022-12-14 15:27:19,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:27:19,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:27:19,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:27:19,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:27:19,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:27:19,255 INFO L87 Difference]: Start difference. First operand 2575 states and 4139 transitions. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 15:27:19,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:27:19,552 INFO L93 Difference]: Finished difference Result 4401 states and 7082 transitions. [2022-12-14 15:27:19,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:27:19,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 73 [2022-12-14 15:27:19,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:27:19,561 INFO L225 Difference]: With dead ends: 4401 [2022-12-14 15:27:19,562 INFO L226 Difference]: Without dead ends: 2820 [2022-12-14 15:27:19,566 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 15:27:19,567 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 42 mSDsluCounter, 2886 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3479 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:27:19,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 3479 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:27:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2022-12-14 15:27:19,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2586. [2022-12-14 15:27:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2586 states, 1856 states have (on average 1.5765086206896552) internal successors, (2926), 1938 states have internal predecessors, (2926), 563 states have call successors, (563), 128 states have call predecessors, (563), 166 states have return successors, (661), 580 states have call predecessors, (661), 558 states have call successors, (661) [2022-12-14 15:27:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 4150 transitions. [2022-12-14 15:27:19,706 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 4150 transitions. Word has length 73 [2022-12-14 15:27:19,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:27:19,706 INFO L495 AbstractCegarLoop]: Abstraction has 2586 states and 4150 transitions. [2022-12-14 15:27:19,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2022-12-14 15:27:19,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 4150 transitions. [2022-12-14 15:27:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 15:27:19,708 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:27:19,708 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] [2022-12-14 15:27:19,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 15:27:19,708 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:27:19,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:27:19,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1399334294, now seen corresponding path program 1 times [2022-12-14 15:27:19,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:27:19,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145988740] [2022-12-14 15:27:19,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:27:19,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:27:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:27:19,859 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 15:27:19,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:27:19,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145988740] [2022-12-14 15:27:19,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145988740] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:27:19,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:27:19,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 15:27:19,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199681518] [2022-12-14 15:27:19,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:27:19,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 15:27:19,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:27:19,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 15:27:19,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:27:19,861 INFO L87 Difference]: Start difference. First operand 2586 states and 4150 transitions. Second operand has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 15:27:21,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:27:21,454 INFO L93 Difference]: Finished difference Result 5886 states and 9503 transitions. [2022-12-14 15:27:21,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 15:27:21,454 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 80 [2022-12-14 15:27:21,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:27:21,466 INFO L225 Difference]: With dead ends: 5886 [2022-12-14 15:27:21,467 INFO L226 Difference]: Without dead ends: 3938 [2022-12-14 15:27:21,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 15:27:21,473 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 2917 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 1307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3081 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 3520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1307 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:27:21,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3081 Valid, 1194 Invalid, 3520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1307 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 15:27:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2022-12-14 15:27:21,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3762. [2022-12-14 15:27:21,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3762 states, 2652 states have (on average 1.5346907993966818) internal successors, (4070), 2783 states have internal predecessors, (4070), 847 states have call successors, (847), 210 states have call predecessors, (847), 262 states have return successors, (1015), 859 states have call predecessors, (1015), 842 states have call successors, (1015) [2022-12-14 15:27:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3762 states to 3762 states and 5932 transitions. [2022-12-14 15:27:21,742 INFO L78 Accepts]: Start accepts. Automaton has 3762 states and 5932 transitions. Word has length 80 [2022-12-14 15:27:21,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:27:21,742 INFO L495 AbstractCegarLoop]: Abstraction has 3762 states and 5932 transitions. [2022-12-14 15:27:21,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.5) internal successors, (52), 8 states have internal predecessors, (52), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-12-14 15:27:21,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3762 states and 5932 transitions. [2022-12-14 15:27:21,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 15:27:21,743 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:27:21,744 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] [2022-12-14 15:27:21,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 15:27:21,744 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:27:21,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:27:21,744 INFO L85 PathProgramCache]: Analyzing trace with hash 359138605, now seen corresponding path program 1 times [2022-12-14 15:27:21,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:27:21,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472656132] [2022-12-14 15:27:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:27:21,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:27:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:27:21,889 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 15:27:21,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:27:21,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472656132] [2022-12-14 15:27:21,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472656132] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:27:21,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:27:21,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 15:27:21,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877050371] [2022-12-14 15:27:21,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:27:21,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:27:21,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:27:21,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:27:21,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:27:21,890 INFO L87 Difference]: Start difference. First operand 3762 states and 5932 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 15:27:23,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:27:23,317 INFO L93 Difference]: Finished difference Result 7165 states and 11361 transitions. [2022-12-14 15:27:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 15:27:23,318 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2022-12-14 15:27:23,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:27:23,330 INFO L225 Difference]: With dead ends: 7165 [2022-12-14 15:27:23,330 INFO L226 Difference]: Without dead ends: 4268 [2022-12-14 15:27:23,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:27:23,337 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 991 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 2468 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 2468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:27:23,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1067 Valid, 1610 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 2468 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 15:27:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2022-12-14 15:27:23,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 3843. [2022-12-14 15:27:23,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3843 states, 2706 states have (on average 1.5284552845528456) internal successors, (4136), 2849 states have internal predecessors, (4136), 850 states have call successors, (850), 225 states have call predecessors, (850), 286 states have return successors, (1049), 859 states have call predecessors, (1049), 845 states have call successors, (1049) [2022-12-14 15:27:23,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3843 states to 3843 states and 6035 transitions. [2022-12-14 15:27:23,616 INFO L78 Accepts]: Start accepts. Automaton has 3843 states and 6035 transitions. Word has length 81 [2022-12-14 15:27:23,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:27:23,616 INFO L495 AbstractCegarLoop]: Abstraction has 3843 states and 6035 transitions. [2022-12-14 15:27:23,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 5 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-12-14 15:27:23,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3843 states and 6035 transitions. [2022-12-14 15:27:23,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-12-14 15:27:23,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:27:23,618 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] [2022-12-14 15:27:23,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 15:27:23,618 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:27:23,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:27:23,618 INFO L85 PathProgramCache]: Analyzing trace with hash 810051517, now seen corresponding path program 1 times [2022-12-14 15:27:23,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:27:23,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081692323] [2022-12-14 15:27:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:27:23,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:27:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:27:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:27:23,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:27:23,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081692323] [2022-12-14 15:27:23,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081692323] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:27:23,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:27:23,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:27:23,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584426662] [2022-12-14 15:27:23,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:27:23,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:27:23,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:27:23,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:27:23,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:27:23,750 INFO L87 Difference]: Start difference. First operand 3843 states and 6035 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 15:27:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:27:24,346 INFO L93 Difference]: Finished difference Result 3947 states and 6197 transitions. [2022-12-14 15:27:24,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:27:24,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 85 [2022-12-14 15:27:24,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:27:24,361 INFO L225 Difference]: With dead ends: 3947 [2022-12-14 15:27:24,361 INFO L226 Difference]: Without dead ends: 3932 [2022-12-14 15:27:24,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:27:24,363 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 677 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1808 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 15:27:24,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1808 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 15:27:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3932 states. [2022-12-14 15:27:24,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3932 to 3849. [2022-12-14 15:27:24,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 2712 states have (on average 1.5272861356932153) internal successors, (4142), 2855 states have internal predecessors, (4142), 850 states have call successors, (850), 225 states have call predecessors, (850), 286 states have return successors, (1049), 859 states have call predecessors, (1049), 845 states have call successors, (1049) [2022-12-14 15:27:24,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 6041 transitions. [2022-12-14 15:27:24,600 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 6041 transitions. Word has length 85 [2022-12-14 15:27:24,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:27:24,600 INFO L495 AbstractCegarLoop]: Abstraction has 3849 states and 6041 transitions. [2022-12-14 15:27:24,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 15:27:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 6041 transitions. [2022-12-14 15:27:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-12-14 15:27:24,602 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:27:24,602 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] [2022-12-14 15:27:24,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 15:27:24,602 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:27:24,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:27:24,602 INFO L85 PathProgramCache]: Analyzing trace with hash 512144377, now seen corresponding path program 1 times [2022-12-14 15:27:24,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:27:24,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034725252] [2022-12-14 15:27:24,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:27:24,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:27:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:27:24,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 15:27:24,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:27:24,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034725252] [2022-12-14 15:27:24,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034725252] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:27:24,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:27:24,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 15:27:24,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908898996] [2022-12-14 15:27:24,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:27:24,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 15:27:24,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:27:24,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 15:27:24,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:27:24,761 INFO L87 Difference]: Start difference. First operand 3849 states and 6041 transitions. Second operand has 6 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 15:27:25,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:27:25,124 INFO L93 Difference]: Finished difference Result 3870 states and 6068 transitions. [2022-12-14 15:27:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:27:25,125 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) Word has length 91 [2022-12-14 15:27:25,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:27:25,140 INFO L225 Difference]: With dead ends: 3870 [2022-12-14 15:27:25,140 INFO L226 Difference]: Without dead ends: 3855 [2022-12-14 15:27:25,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:27:25,142 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 41 mSDsluCounter, 2146 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2695 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:27:25,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2695 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:27:25,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2022-12-14 15:27:25,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 3849. [2022-12-14 15:27:25,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 2712 states have (on average 1.5243362831858407) internal successors, (4134), 2855 states have internal predecessors, (4134), 850 states have call successors, (850), 225 states have call predecessors, (850), 286 states have return successors, (1049), 859 states have call predecessors, (1049), 845 states have call successors, (1049) [2022-12-14 15:27:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 6033 transitions. [2022-12-14 15:27:25,382 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 6033 transitions. Word has length 91 [2022-12-14 15:27:25,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:27:25,382 INFO L495 AbstractCegarLoop]: Abstraction has 3849 states and 6033 transitions. [2022-12-14 15:27:25,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 1 states have call successors, (15) [2022-12-14 15:27:25,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 6033 transitions. [2022-12-14 15:27:25,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-12-14 15:27:25,384 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:27:25,384 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 15:27:25,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 15:27:25,384 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:27:25,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:27:25,384 INFO L85 PathProgramCache]: Analyzing trace with hash -732016486, now seen corresponding path program 1 times [2022-12-14 15:27:25,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:27:25,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094549785] [2022-12-14 15:27:25,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:27:25,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:27:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:27:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:27:25,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:27:25,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094549785] [2022-12-14 15:27:25,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094549785] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:27:25,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124379081] [2022-12-14 15:27:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:27:25,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:27:25,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:27:25,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:27:25,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 15:27:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:27:26,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:27:26,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:27:26,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:27:26,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:27:26,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124379081] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:27:26,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:27:26,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [16] total 21 [2022-12-14 15:27:26,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790908008] [2022-12-14 15:27:26,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:27:26,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:27:26,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:27:26,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:27:26,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-12-14 15:27:26,707 INFO L87 Difference]: Start difference. First operand 3849 states and 6033 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 15:27:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:27:28,544 INFO L93 Difference]: Finished difference Result 8961 states and 14026 transitions. [2022-12-14 15:27:28,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:27:28,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 98 [2022-12-14 15:27:28,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:27:28,562 INFO L225 Difference]: With dead ends: 8961 [2022-12-14 15:27:28,562 INFO L226 Difference]: Without dead ends: 5128 [2022-12-14 15:27:28,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-12-14 15:27:28,570 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 741 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:27:28,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 1872 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 15:27:28,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5128 states. [2022-12-14 15:27:28,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5128 to 5077. [2022-12-14 15:27:28,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5077 states, 3590 states have (on average 1.5172701949860725) internal successors, (5447), 3761 states have internal predecessors, (5447), 1112 states have call successors, (1112), 298 states have call predecessors, (1112), 374 states have return successors, (1364), 1109 states have call predecessors, (1364), 1107 states have call successors, (1364) [2022-12-14 15:27:28,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5077 states to 5077 states and 7923 transitions. [2022-12-14 15:27:28,884 INFO L78 Accepts]: Start accepts. Automaton has 5077 states and 7923 transitions. Word has length 98 [2022-12-14 15:27:28,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:27:28,884 INFO L495 AbstractCegarLoop]: Abstraction has 5077 states and 7923 transitions. [2022-12-14 15:27:28,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-12-14 15:27:28,885 INFO L276 IsEmpty]: Start isEmpty. Operand 5077 states and 7923 transitions. [2022-12-14 15:27:28,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-12-14 15:27:28,887 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:27:28,887 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:27:28,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 15:27:29,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 15:27:29,089 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:27:29,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:27:29,090 INFO L85 PathProgramCache]: Analyzing trace with hash 223356888, now seen corresponding path program 1 times [2022-12-14 15:27:29,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:27:29,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820480636] [2022-12-14 15:27:29,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:27:29,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:27:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:27:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 15:27:29,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:27:29,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820480636] [2022-12-14 15:27:29,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820480636] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:27:29,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592453582] [2022-12-14 15:27:29,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:27:29,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:27:29,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:27:29,446 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:27:29,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 15:27:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:27:29,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 15:27:29,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:27:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 15:27:31,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:27:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 15:27:32,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592453582] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:27:32,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1186224808] [2022-12-14 15:27:32,730 INFO L159 IcfgInterpreter]: Started Sifa with 94 locations of interest [2022-12-14 15:27:32,730 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:27:32,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:27:32,738 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:27:32,738 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:27:36,731 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 588 for LOIs [2022-12-14 15:28:49,551 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 588 for LOIs [2022-12-14 15:28:58,228 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 114 for LOIs [2022-12-14 15:28:58,744 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 128 for LOIs [2022-12-14 15:28:59,319 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 51 for LOIs [2022-12-14 15:28:59,330 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 87 for LOIs [2022-12-14 15:28:59,348 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 99 for LOIs [2022-12-14 15:28:59,360 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 581 for LOIs [2022-12-14 15:29:02,894 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 15:29:03,500 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 453 for LOIs [2022-12-14 15:29:03,793 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 91 for LOIs [2022-12-14 15:29:03,914 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 87 for LOIs [2022-12-14 15:29:03,922 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 15:29:04,073 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:30:47,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1186224808] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:30:47,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:30:47,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [11, 12, 12] total 94 [2022-12-14 15:30:47,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518689449] [2022-12-14 15:30:47,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:30:47,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 15:30:47,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:30:47,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 15:30:47,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=8046, Unknown=0, NotChecked=0, Total=8742 [2022-12-14 15:30:47,284 INFO L87 Difference]: Start difference. First operand 5077 states and 7923 transitions. Second operand has 68 states, 56 states have (on average 1.125) internal successors, (63), 44 states have internal predecessors, (63), 17 states have call successors, (17), 13 states have call predecessors, (17), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 15:33:00,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:33:00,987 INFO L93 Difference]: Finished difference Result 10976 states and 17110 transitions. [2022-12-14 15:33:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-14 15:33:00,988 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 56 states have (on average 1.125) internal successors, (63), 44 states have internal predecessors, (63), 17 states have call successors, (17), 13 states have call predecessors, (17), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 99 [2022-12-14 15:33:00,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:33:01,006 INFO L225 Difference]: With dead ends: 10976 [2022-12-14 15:33:01,006 INFO L226 Difference]: Without dead ends: 5899 [2022-12-14 15:33:01,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 211 SyntacticMatches, 6 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5573 ImplicationChecksByTransitivity, 190.4s TimeCoverageRelationStatistics Valid=1093, Invalid=13913, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 15:33:01,021 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 827 mSDsluCounter, 6953 mSDsCounter, 0 mSdLazyCounter, 16767 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 7487 SdHoareTripleChecker+Invalid, 16969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 16767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:33:01,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [834 Valid, 7487 Invalid, 16969 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [202 Valid, 16767 Invalid, 0 Unknown, 0 Unchecked, 45.8s Time] [2022-12-14 15:33:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5899 states. [2022-12-14 15:33:01,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5899 to 5664. [2022-12-14 15:33:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5664 states, 4042 states have (on average 1.5069272637308264) internal successors, (6091), 4214 states have internal predecessors, (6091), 1201 states have call successors, (1201), 335 states have call predecessors, (1201), 420 states have return successors, (1478), 1206 states have call predecessors, (1478), 1196 states have call successors, (1478) [2022-12-14 15:33:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5664 states to 5664 states and 8770 transitions. [2022-12-14 15:33:01,691 INFO L78 Accepts]: Start accepts. Automaton has 5664 states and 8770 transitions. Word has length 99 [2022-12-14 15:33:01,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:33:01,691 INFO L495 AbstractCegarLoop]: Abstraction has 5664 states and 8770 transitions. [2022-12-14 15:33:01,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 56 states have (on average 1.125) internal successors, (63), 44 states have internal predecessors, (63), 17 states have call successors, (17), 13 states have call predecessors, (17), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-12-14 15:33:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 5664 states and 8770 transitions. [2022-12-14 15:33:01,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-14 15:33:01,693 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:33:01,693 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:33:01,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 15:33:01,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:33:01,894 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:33:01,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:33:01,894 INFO L85 PathProgramCache]: Analyzing trace with hash -182468143, now seen corresponding path program 1 times [2022-12-14 15:33:01,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:33:01,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264231117] [2022-12-14 15:33:01,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:33:01,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:33:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:33:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 15:33:02,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:33:02,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264231117] [2022-12-14 15:33:02,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264231117] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:33:02,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:33:02,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 15:33:02,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245544486] [2022-12-14 15:33:02,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:33:02,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:33:02,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:33:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:33:02,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:33:02,024 INFO L87 Difference]: Start difference. First operand 5664 states and 8770 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 15:33:02,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:33:02,957 INFO L93 Difference]: Finished difference Result 10218 states and 15977 transitions. [2022-12-14 15:33:02,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:33:02,958 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 108 [2022-12-14 15:33:02,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:33:02,975 INFO L225 Difference]: With dead ends: 10218 [2022-12-14 15:33:02,976 INFO L226 Difference]: Without dead ends: 6283 [2022-12-14 15:33:02,986 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 15:33:02,986 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 37 mSDsluCounter, 2890 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3482 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:33:02,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3482 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:33:02,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6283 states. [2022-12-14 15:33:03,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6283 to 5852. [2022-12-14 15:33:03,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5852 states, 4176 states have (on average 1.4973659003831417) internal successors, (6253), 4359 states have internal predecessors, (6253), 1213 states have call successors, (1213), 335 states have call predecessors, (1213), 462 states have return successors, (1559), 1249 states have call predecessors, (1559), 1208 states have call successors, (1559) [2022-12-14 15:33:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5852 states to 5852 states and 9025 transitions. [2022-12-14 15:33:03,654 INFO L78 Accepts]: Start accepts. Automaton has 5852 states and 9025 transitions. Word has length 108 [2022-12-14 15:33:03,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:33:03,654 INFO L495 AbstractCegarLoop]: Abstraction has 5852 states and 9025 transitions. [2022-12-14 15:33:03,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 15:33:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 5852 states and 9025 transitions. [2022-12-14 15:33:03,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 15:33:03,656 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:33:03,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:33:03,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 15:33:03,656 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:33:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:33:03,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1333440405, now seen corresponding path program 1 times [2022-12-14 15:33:03,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:33:03,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408389788] [2022-12-14 15:33:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:33:03,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:33:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:33:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 15:33:03,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:33:03,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408389788] [2022-12-14 15:33:03,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408389788] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:33:03,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 15:33:03,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 15:33:03,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866595485] [2022-12-14 15:33:03,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:33:03,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 15:33:03,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:33:03,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 15:33:03,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:33:03,791 INFO L87 Difference]: Start difference. First operand 5852 states and 9025 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 15:33:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:33:04,660 INFO L93 Difference]: Finished difference Result 10417 states and 16228 transitions. [2022-12-14 15:33:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 15:33:04,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) Word has length 109 [2022-12-14 15:33:04,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:33:04,679 INFO L225 Difference]: With dead ends: 10417 [2022-12-14 15:33:04,680 INFO L226 Difference]: Without dead ends: 6334 [2022-12-14 15:33:04,692 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 15:33:04,692 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 37 mSDsluCounter, 2899 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3493 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:33:04,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3493 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:33:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2022-12-14 15:33:05,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 5855. [2022-12-14 15:33:05,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5855 states, 4195 states have (on average 1.501072705601907) internal successors, (6297), 4346 states have internal predecessors, (6297), 1222 states have call successors, (1222), 332 states have call predecessors, (1222), 437 states have return successors, (1527), 1268 states have call predecessors, (1527), 1217 states have call successors, (1527) [2022-12-14 15:33:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5855 states to 5855 states and 9046 transitions. [2022-12-14 15:33:05,382 INFO L78 Accepts]: Start accepts. Automaton has 5855 states and 9046 transitions. Word has length 109 [2022-12-14 15:33:05,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:33:05,382 INFO L495 AbstractCegarLoop]: Abstraction has 5855 states and 9046 transitions. [2022-12-14 15:33:05,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 4 states have call predecessors, (18), 2 states have call successors, (18) [2022-12-14 15:33:05,382 INFO L276 IsEmpty]: Start isEmpty. Operand 5855 states and 9046 transitions. [2022-12-14 15:33:05,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-12-14 15:33:05,384 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:33:05,385 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:33:05,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-14 15:33:05,385 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:33:05,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:33:05,385 INFO L85 PathProgramCache]: Analyzing trace with hash 977773634, now seen corresponding path program 1 times [2022-12-14 15:33:05,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:33:05,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956297912] [2022-12-14 15:33:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:33:05,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:33:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:33:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:33:05,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:33:05,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956297912] [2022-12-14 15:33:05,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956297912] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:33:05,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015591100] [2022-12-14 15:33:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:33:05,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:33:05,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:33:05,754 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:33:05,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 15:33:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:33:05,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 1565 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 15:33:05,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:33:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:33:06,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:33:06,683 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 15:33:06,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015591100] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:33:06,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [67321332] [2022-12-14 15:33:06,687 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2022-12-14 15:33:06,688 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:33:06,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:33:06,688 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:33:06,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:33:09,790 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 588 for LOIs [2022-12-14 15:33:10,730 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 588 for LOIs [2022-12-14 15:33:19,271 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 113 for LOIs [2022-12-14 15:33:19,939 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 111 for LOIs [2022-12-14 15:33:20,443 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 101 for LOIs [2022-12-14 15:33:20,451 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 533 for LOIs [2022-12-14 15:33:20,691 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 87 for LOIs [2022-12-14 15:33:20,709 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 581 for LOIs [2022-12-14 15:33:24,340 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 15:33:24,938 INFO L197 IcfgInterpreter]: Interpreting procedure getReverseHeading with input of size 87 for LOIs [2022-12-14 15:33:24,947 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 15:33:25,099 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:34:23,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [67321332] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:34:23,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:34:23,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [13, 13, 13] total 72 [2022-12-14 15:34:23,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137229004] [2022-12-14 15:34:23,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:34:23,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 15:34:23,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:34:23,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 15:34:23,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=4623, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 15:34:23,074 INFO L87 Difference]: Start difference. First operand 5855 states and 9046 transitions. Second operand has 47 states, 34 states have (on average 2.0) internal successors, (68), 29 states have internal predecessors, (68), 14 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 11 states have call predecessors, (18), 14 states have call successors, (18) [2022-12-14 15:34:41,923 WARN L233 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 673 DAG size of output: 598 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 15:35:44,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:35:44,208 INFO L93 Difference]: Finished difference Result 10115 states and 15707 transitions. [2022-12-14 15:35:44,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 15:35:44,209 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 34 states have (on average 2.0) internal successors, (68), 29 states have internal predecessors, (68), 14 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 11 states have call predecessors, (18), 14 states have call successors, (18) Word has length 121 [2022-12-14 15:35:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:35:44,224 INFO L225 Difference]: With dead ends: 10115 [2022-12-14 15:35:44,224 INFO L226 Difference]: Without dead ends: 5840 [2022-12-14 15:35:44,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 294 SyntacticMatches, 12 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2388 ImplicationChecksByTransitivity, 109.1s TimeCoverageRelationStatistics Valid=671, Invalid=6639, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 15:35:44,235 INFO L413 NwaCegarLoop]: 478 mSDtfsCounter, 139 mSDsluCounter, 6192 mSDsCounter, 0 mSdLazyCounter, 10254 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 6670 SdHoareTripleChecker+Invalid, 10287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 10254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.3s IncrementalHoareTripleChecker+Time [2022-12-14 15:35:44,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 6670 Invalid, 10287 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [33 Valid, 10254 Invalid, 0 Unknown, 0 Unchecked, 29.3s Time] [2022-12-14 15:35:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5840 states. [2022-12-14 15:35:44,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5840 to 5773. [2022-12-14 15:35:44,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5773 states, 4133 states have (on average 1.5044761674328575) internal successors, (6218), 4285 states have internal predecessors, (6218), 1210 states have call successors, (1210), 328 states have call predecessors, (1210), 429 states have return successors, (1509), 1251 states have call predecessors, (1509), 1205 states have call successors, (1509) [2022-12-14 15:35:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5773 states to 5773 states and 8937 transitions. [2022-12-14 15:35:44,892 INFO L78 Accepts]: Start accepts. Automaton has 5773 states and 8937 transitions. Word has length 121 [2022-12-14 15:35:44,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:35:44,892 INFO L495 AbstractCegarLoop]: Abstraction has 5773 states and 8937 transitions. [2022-12-14 15:35:44,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 34 states have (on average 2.0) internal successors, (68), 29 states have internal predecessors, (68), 14 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 11 states have call predecessors, (18), 14 states have call successors, (18) [2022-12-14 15:35:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand 5773 states and 8937 transitions. [2022-12-14 15:35:44,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-14 15:35:44,894 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:35:44,894 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2022-12-14 15:35:44,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 15:35:45,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 15:35:45,095 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:35:45,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:35:45,097 INFO L85 PathProgramCache]: Analyzing trace with hash 301536154, now seen corresponding path program 1 times [2022-12-14 15:35:45,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:35:45,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414474409] [2022-12-14 15:35:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:35:45,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:35:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 15:35:45,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:35:45,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414474409] [2022-12-14 15:35:45,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414474409] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:35:45,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179799369] [2022-12-14 15:35:45,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:35:45,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:35:45,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:35:45,230 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:35:45,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 15:35:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:45,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 1533 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:35:45,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:35:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 15:35:45,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:35:45,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179799369] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:35:45,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:35:45,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-12-14 15:35:45,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590838310] [2022-12-14 15:35:45,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:35:45,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:35:45,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:35:45,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:35:45,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:35:45,445 INFO L87 Difference]: Start difference. First operand 5773 states and 8937 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 15:35:46,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:35:46,707 INFO L93 Difference]: Finished difference Result 11473 states and 18059 transitions. [2022-12-14 15:35:46,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:35:46,707 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 118 [2022-12-14 15:35:46,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:35:46,720 INFO L225 Difference]: With dead ends: 11473 [2022-12-14 15:35:46,720 INFO L226 Difference]: Without dead ends: 6241 [2022-12-14 15:35:46,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 15:35:46,728 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 213 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:35:46,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1416 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:35:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6241 states. [2022-12-14 15:35:47,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6241 to 6241. [2022-12-14 15:35:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6241 states, 4589 states have (on average 1.545870560034866) internal successors, (7094), 4741 states have internal predecessors, (7094), 1210 states have call successors, (1210), 340 states have call predecessors, (1210), 441 states have return successors, (1509), 1251 states have call predecessors, (1509), 1205 states have call successors, (1509) [2022-12-14 15:35:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6241 states to 6241 states and 9813 transitions. [2022-12-14 15:35:47,385 INFO L78 Accepts]: Start accepts. Automaton has 6241 states and 9813 transitions. Word has length 118 [2022-12-14 15:35:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:35:47,386 INFO L495 AbstractCegarLoop]: Abstraction has 6241 states and 9813 transitions. [2022-12-14 15:35:47,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 15:35:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 6241 states and 9813 transitions. [2022-12-14 15:35:47,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 15:35:47,388 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:35:47,388 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 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] [2022-12-14 15:35:47,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 15:35:47,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 15:35:47,588 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:35:47,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:35:47,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1627940518, now seen corresponding path program 1 times [2022-12-14 15:35:47,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:35:47,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662692642] [2022-12-14 15:35:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:35:47,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:35:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 15:35:47,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:35:47,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662692642] [2022-12-14 15:35:47,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662692642] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:35:47,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139013797] [2022-12-14 15:35:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:35:47,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:35:47,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:35:47,665 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:35:47,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 15:35:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:47,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:35:47,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:35:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 15:35:47,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:35:47,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139013797] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:35:47,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:35:47,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 15:35:47,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137686507] [2022-12-14 15:35:47,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:35:47,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:35:47,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:35:47,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:35:47,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:35:47,860 INFO L87 Difference]: Start difference. First operand 6241 states and 9813 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 15:35:48,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:35:48,943 INFO L93 Difference]: Finished difference Result 12409 states and 19799 transitions. [2022-12-14 15:35:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:35:48,943 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 123 [2022-12-14 15:35:48,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:35:48,959 INFO L225 Difference]: With dead ends: 12409 [2022-12-14 15:35:48,960 INFO L226 Difference]: Without dead ends: 6709 [2022-12-14 15:35:48,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:35:48,972 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 211 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:35:48,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1416 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:35:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6709 states. [2022-12-14 15:35:49,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6709 to 6709. [2022-12-14 15:35:49,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6709 states, 5045 states have (on average 1.5797819623389495) internal successors, (7970), 5197 states have internal predecessors, (7970), 1210 states have call successors, (1210), 352 states have call predecessors, (1210), 453 states have return successors, (1509), 1251 states have call predecessors, (1509), 1205 states have call successors, (1509) [2022-12-14 15:35:49,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 10689 transitions. [2022-12-14 15:35:49,645 INFO L78 Accepts]: Start accepts. Automaton has 6709 states and 10689 transitions. Word has length 123 [2022-12-14 15:35:49,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:35:49,645 INFO L495 AbstractCegarLoop]: Abstraction has 6709 states and 10689 transitions. [2022-12-14 15:35:49,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 15:35:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 6709 states and 10689 transitions. [2022-12-14 15:35:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 15:35:49,647 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:35:49,647 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 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 15:35:49,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 15:35:49,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 15:35:49,849 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:35:49,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:35:49,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1470276054, now seen corresponding path program 1 times [2022-12-14 15:35:49,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:35:49,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759986165] [2022-12-14 15:35:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:35:49,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:35:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-14 15:35:49,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:35:49,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759986165] [2022-12-14 15:35:49,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759986165] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:35:49,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869332329] [2022-12-14 15:35:49,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:35:49,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:35:49,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:35:49,975 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:35:49,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 15:35:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:50,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 1542 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:35:50,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:35:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 15:35:50,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:35:50,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869332329] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:35:50,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:35:50,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 15:35:50,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17313637] [2022-12-14 15:35:50,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:35:50,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:35:50,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:35:50,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:35:50,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:35:50,202 INFO L87 Difference]: Start difference. First operand 6709 states and 10689 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 15:35:51,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:35:51,110 INFO L93 Difference]: Finished difference Result 13345 states and 21539 transitions. [2022-12-14 15:35:51,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:35:51,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 127 [2022-12-14 15:35:51,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:35:51,127 INFO L225 Difference]: With dead ends: 13345 [2022-12-14 15:35:51,128 INFO L226 Difference]: Without dead ends: 7177 [2022-12-14 15:35:51,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:35:51,139 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 209 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:35:51,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1416 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:35:51,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7177 states. [2022-12-14 15:35:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7177 to 7177. [2022-12-14 15:35:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7177 states, 5501 states have (on average 1.6080712597709508) internal successors, (8846), 5653 states have internal predecessors, (8846), 1210 states have call successors, (1210), 364 states have call predecessors, (1210), 465 states have return successors, (1509), 1251 states have call predecessors, (1509), 1205 states have call successors, (1509) [2022-12-14 15:35:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7177 states to 7177 states and 11565 transitions. [2022-12-14 15:35:51,816 INFO L78 Accepts]: Start accepts. Automaton has 7177 states and 11565 transitions. Word has length 127 [2022-12-14 15:35:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:35:51,817 INFO L495 AbstractCegarLoop]: Abstraction has 7177 states and 11565 transitions. [2022-12-14 15:35:51,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 15:35:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 7177 states and 11565 transitions. [2022-12-14 15:35:51,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-12-14 15:35:51,819 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:35:51,819 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:35:51,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 15:35:52,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 15:35:52,021 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:35:52,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:35:52,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1161514042, now seen corresponding path program 1 times [2022-12-14 15:35:52,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:35:52,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029596970] [2022-12-14 15:35:52,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:35:52,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:35:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-14 15:35:52,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:35:52,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029596970] [2022-12-14 15:35:52,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029596970] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:35:52,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759264877] [2022-12-14 15:35:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:35:52,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:35:52,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:35:52,130 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:35:52,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 15:35:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:52,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1545 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 15:35:52,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:35:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 15:35:52,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:35:52,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759264877] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:35:52,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:35:52,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-12-14 15:35:52,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822665666] [2022-12-14 15:35:52,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:35:52,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:35:52,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:35:52,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:35:52,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 15:35:52,332 INFO L87 Difference]: Start difference. First operand 7177 states and 11565 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 15:35:53,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:35:53,322 INFO L93 Difference]: Finished difference Result 14281 states and 23279 transitions. [2022-12-14 15:35:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:35:53,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 130 [2022-12-14 15:35:53,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:35:53,341 INFO L225 Difference]: With dead ends: 14281 [2022-12-14 15:35:53,341 INFO L226 Difference]: Without dead ends: 7645 [2022-12-14 15:35:53,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 15:35:53,353 INFO L413 NwaCegarLoop]: 480 mSDtfsCounter, 207 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1416 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 15:35:53,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1416 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 15:35:53,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7645 states. [2022-12-14 15:35:54,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7645 to 7645. [2022-12-14 15:35:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7645 states, 5957 states have (on average 1.6320295450730233) internal successors, (9722), 6109 states have internal predecessors, (9722), 1210 states have call successors, (1210), 376 states have call predecessors, (1210), 477 states have return successors, (1509), 1251 states have call predecessors, (1509), 1205 states have call successors, (1509) [2022-12-14 15:35:54,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7645 states to 7645 states and 12441 transitions. [2022-12-14 15:35:54,088 INFO L78 Accepts]: Start accepts. Automaton has 7645 states and 12441 transitions. Word has length 130 [2022-12-14 15:35:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:35:54,088 INFO L495 AbstractCegarLoop]: Abstraction has 7645 states and 12441 transitions. [2022-12-14 15:35:54,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2022-12-14 15:35:54,088 INFO L276 IsEmpty]: Start isEmpty. Operand 7645 states and 12441 transitions. [2022-12-14 15:35:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-12-14 15:35:54,090 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:35:54,090 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 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] [2022-12-14 15:35:54,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 15:35:54,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 15:35:54,292 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:35:54,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:35:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1567086488, now seen corresponding path program 1 times [2022-12-14 15:35:54,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:35:54,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377231117] [2022-12-14 15:35:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:35:54,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:35:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-14 15:35:54,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:35:54,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377231117] [2022-12-14 15:35:54,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377231117] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:35:54,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790925907] [2022-12-14 15:35:54,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:35:54,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:35:54,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:35:54,470 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:35:54,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 15:35:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:54,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 1541 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 15:35:54,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:35:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 15:35:54,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:35:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 15:35:54,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790925907] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 15:35:54,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 15:35:54,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 5] total 12 [2022-12-14 15:35:54,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334854317] [2022-12-14 15:35:54,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:35:54,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:35:54,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:35:54,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:35:54,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-12-14 15:35:54,762 INFO L87 Difference]: Start difference. First operand 7645 states and 12441 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2022-12-14 15:35:55,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:35:55,618 INFO L93 Difference]: Finished difference Result 7816 states and 12731 transitions. [2022-12-14 15:35:55,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:35:55,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) Word has length 132 [2022-12-14 15:35:55,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:35:55,636 INFO L225 Difference]: With dead ends: 7816 [2022-12-14 15:35:55,636 INFO L226 Difference]: Without dead ends: 7801 [2022-12-14 15:35:55,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-14 15:35:55,639 INFO L413 NwaCegarLoop]: 582 mSDtfsCounter, 44 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 15:35:55,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1695 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 15:35:55,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7801 states. [2022-12-14 15:35:56,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7801 to 7667. [2022-12-14 15:35:56,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7667 states, 5979 states have (on average 1.62953671182472) internal successors, (9743), 6131 states have internal predecessors, (9743), 1210 states have call successors, (1210), 376 states have call predecessors, (1210), 477 states have return successors, (1509), 1251 states have call predecessors, (1509), 1205 states have call successors, (1509) [2022-12-14 15:35:56,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7667 states to 7667 states and 12462 transitions. [2022-12-14 15:35:56,320 INFO L78 Accepts]: Start accepts. Automaton has 7667 states and 12462 transitions. Word has length 132 [2022-12-14 15:35:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:35:56,321 INFO L495 AbstractCegarLoop]: Abstraction has 7667 states and 12462 transitions. [2022-12-14 15:35:56,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 1 states have call successors, (16) [2022-12-14 15:35:56,321 INFO L276 IsEmpty]: Start isEmpty. Operand 7667 states and 12462 transitions. [2022-12-14 15:35:56,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 15:35:56,325 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:35:56,325 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:35:56,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 15:35:56,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:35:56,527 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:35:56,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:35:56,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1663081779, now seen corresponding path program 1 times [2022-12-14 15:35:56,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:35:56,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622350586] [2022-12-14 15:35:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:35:56,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:35:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 15:35:56,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:35:56,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622350586] [2022-12-14 15:35:56,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622350586] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:35:56,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667564331] [2022-12-14 15:35:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:35:56,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:35:56,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:35:56,915 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:35:56,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 15:35:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:35:57,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 1873 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 15:35:57,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:35:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 32 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 15:35:57,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 15:35:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 15:35:57,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667564331] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 15:35:57,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035101282] [2022-12-14 15:35:57,580 INFO L159 IcfgInterpreter]: Started Sifa with 106 locations of interest [2022-12-14 15:35:57,580 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 15:35:57,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 15:35:57,581 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 15:35:57,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 15:36:03,817 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 410 for LOIs [2022-12-14 15:36:03,881 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 588 for LOIs [2022-12-14 15:36:21,643 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 709 for LOIs [2022-12-14 15:36:27,195 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 35 for LOIs [2022-12-14 15:36:27,733 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__weight with input of size 93 for LOIs [2022-12-14 15:36:28,251 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 44 for LOIs [2022-12-14 15:36:28,261 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 26 for LOIs [2022-12-14 15:36:28,268 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 22 for LOIs [2022-12-14 15:36:28,270 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 581 for LOIs [2022-12-14 15:36:31,837 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 585 for LOIs [2022-12-14 15:36:32,420 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 24 for LOIs [2022-12-14 15:36:32,422 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 33 for LOIs [2022-12-14 15:36:32,470 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 58 for LOIs [2022-12-14 15:36:32,475 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 513 for LOIs [2022-12-14 15:36:32,626 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 15:37:39,929 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '319187#(and (= (select |#length| 15) 25) (= 9 (select |#length| 5)) (= (select |#length| 9) 21) (= (select (select |#memory_int| 28) 2) 105) (= 32 (select (select |#memory_int| 28) 0)) (= 30 (select |#length| 7)) (= (select |#valid| 30) 1) (= 1 (select |#valid| 5)) (= (select |#length| 3) 12) (= (select (select |#memory_int| 31) 2) 105) (= (select |#valid| 15) 1) (<= 0 (+ ~currentFloorID~0 2147483648)) (= (select (select |#memory_int| 34) 2) 105) (= 32 (select (select |#memory_int| 34) 0)) (= 10 (select |#length| 16)) (= (select |#length| 33) 4) (= (select |#valid| 26) 1) (= (select (select |#memory_int| 26) 3) 0) (= (select (select |#memory_int| 20) 2) 0) (= 3 (select |#length| 20)) (= (select |#valid| 35) 1) (= (select |#valid| 9) 1) (= (select (select |#memory_int| 24) 1) 73) (= (select (select |#memory_int| 23) 3) 110) (= 91 (select (select |#memory_int| 18) 0)) (= (select |#length| 12) 25) (= (select (select |#memory_int| 25) 3) 0) (= 91 (select (select |#memory_int| 17) 0)) (= (select (select |#memory_int| 30) 4) 58) (= (select |#valid| 11) 1) (= (select |#valid| 27) 1) (= (select |#valid| 33) 1) (= (select (select |#memory_int| 32) 2) 105) (= 30 (select |#length| 4)) (= (select (select |#memory_int| 29) 2) 105) (= (select |#length| 28) 4) (= 4 (select |#length| 31)) (= (select |#length| 27) 4) (= (select |#length| 22) 3) (<= ~currentFloorID~0 2147483647) (= 4 (select |#length| 26)) (= 6 (select |#length| 30)) (= 112 (select (select |#memory_int| 22) 1)) (= (select (select |#memory_int| 17) 2) 93) (= 31 (select |#length| 2)) (= (select (select |#memory_int| 27) 3) 0) (= 76 (select (select |#memory_int| 24) 2)) (= ~head~0.offset 0) (= (select (select |#memory_int| 32) 3) 0) (= 2 (select |#length| 1)) (= (select |#length| 8) 9) (= (select (select |#memory_int| 28) 3) 0) (= (select (select |#memory_int| 29) 3) 0) (= 95 (select (select |#memory_int| 30) 2)) (= 32 (select (select |#memory_int| 30) 0)) (= (select (select |#memory_int| 30) 1) 70) (= 4 (select |#length| 25)) (= (select |#valid| 3) 1) (= (select |#valid| 7) 1) (= (select |#valid| 18) 1) (= (select |#valid| 22) 1) (= 30 (select |#length| 13)) (= (select (select |#memory_int| 18) 3) 0) (= 2 (select |#length| 36)) (= (select (select |#memory_int| 26) 2) 105) (= (select (select |#memory_int| 34) 1) 37) (= (select (select |#memory_int| 19) 4) 0) (= (select |#valid| 24) 1) (= 30 (select |#length| 10)) (= (select (select |#memory_int| 29) 1) 37) (= (select (select |#memory_int| 25) 1) 37) (= (select (select |#memory_int| 17) 3) 0) (= 4 (select |#length| 34)) (= (select |#valid| 12) 1) (= (select |#valid| 32) 1) (= (select (select |#memory_int| 31) 1) 37) (= (select |#valid| 28) 1) (= (select (select |#memory_int| 18) 2) 32) (= (select (select |#memory_int| 25) 2) 105) (= (select |#length| 17) 4) (= (select (select |#memory_int| 27) 1) 37) (= (select |#length| 35) 4) (= (select |#valid| 4) 1) (= 5 (select |#length| 23)) (= (select (select |#memory_int| 35) 3) 0) (= 119 (select (select |#memory_int| 23) 2)) (= 32 (select (select |#memory_int| 24) 0)) (= 32 (select (select |#memory_int| 26) 0)) (= (select (select |#memory_int| 32) 1) 37) (= (select (select |#memory_int| 28) 1) 37) (not (= 0 ~floorButtons_spc2_0~0)) (= (select (select |#memory_int| 30) 5) 0) (= (select (select |#memory_int| 22) 2) 0) (= (select (select |#memory_int| 20) 1) 105) (= (select (select |#memory_int| 33) 3) 0) (= (select |#valid| 1) 1) (= (select |#valid| 20) 1) (= 97 (select (select |#memory_int| 19) 1)) (= 32 (select (select |#memory_int| 35) 0)) (= (select |#length| 6) 21) (= (select (select |#memory_int| 36) 1) 0) (= (select (select |#memory_int| 23) 0) 100) (= (select |#valid| 21) 1) (= 7 (select |#length| 24)) (= 58 (select (select |#memory_int| 24) 5)) (= (select (select |#memory_int| 24) 6) 0) (= (select (select |#memory_int| 31) 0) 32) (= (select (select |#memory_int| 33) 1) 37) (= 32 (select (select |#memory_int| 27) 0)) (= (select |#valid| 14) 1) (= 95 (select (select |#memory_int| 24) 3)) (= 9 (select |#length| 14)) (= (select |#valid| 0) 0) (= (select (select |#memory_int| 33) 0) 32) (= (select (select |#memory_int| 35) 1) 37) (= (select |#valid| 25) 1) (= 4 (select |#length| 18)) (= ~head~0.base 0) (= (select |#length| 32) 4) (= 112 (select (select |#memory_int| 24) 4)) (= (select (select |#memory_int| 17) 1) 95) (= (select (select |#memory_int| 34) 3) 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (= (select |#valid| 36) 1) (= 9 (select |#length| 11)) (= (select |#length| 29) 4) (= (select (select |#memory_int| 1) 0) 48) (= (select |#valid| 23) 1) (= 32 (select (select |#memory_int| 29) 0)) (= (select (select |#memory_int| 26) 1) 37) (= 112 (select (select |#memory_int| 30) 3)) (= (select (select |#memory_int| 23) 4) 0) (= (select |#valid| 19) 1) (= 32 (select (select |#memory_int| 19) 3)) (= (select |#valid| 31) 1) (= (select |#valid| 34) 1) (= (select (select |#memory_int| 33) 2) 105) (= (select (select |#memory_int| 27) 2) 105) (= (select |#valid| 16) 1) (= 111 (select (select |#memory_int| 23) 1)) (= 116 (select (select |#memory_int| 19) 2)) (= (select |#valid| 6) 1) (= (select (select |#memory_int| 20) 0) 37) (= (select (select |#memory_int| 1) 1) 0) (= (select (select |#memory_int| 36) 0) 10) (= (select |#valid| 29) 1) (= (select (select |#memory_int| 22) 0) 117) (= ~maximumWeight~0 100) (= (select (select |#memory_int| 25) 0) 32) (= (select (select |#memory_int| 31) 3) 0) (= (select |#length| 21) 10) (= (select |#valid| 17) 1) (= 93 (select (select |#memory_int| 18) 1)) (= (select |#valid| 10) 1) (= (select |#valid| 8) 1) (= 32 (select (select |#memory_int| 19) 0)) (= (select |#length| 19) 5) (= (select |#valid| 13) 1) (< 0 |#StackHeapBarrier|) (= ~cleanupTimeShifts~0 12) (= (select (select |#memory_int| 35) 2) 105) (= |#NULL.base| 0) (= 32 (select (select |#memory_int| 32) 0)))' at error location [2022-12-14 15:37:39,929 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 15:37:39,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 15:37:39,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-12-14 15:37:39,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915892861] [2022-12-14 15:37:39,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 15:37:39,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 15:37:39,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:37:39,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 15:37:39,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=11067, Unknown=0, NotChecked=0, Total=11772 [2022-12-14 15:37:39,933 INFO L87 Difference]: Start difference. First operand 7667 states and 12462 transitions. Second operand has 22 states, 19 states have (on average 8.421052631578947) internal successors, (160), 18 states have internal predecessors, (160), 11 states have call successors, (44), 7 states have call predecessors, (44), 10 states have return successors, (45), 14 states have call predecessors, (45), 10 states have call successors, (45) [2022-12-14 15:37:53,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:37:53,819 INFO L93 Difference]: Finished difference Result 33643 states and 57220 transitions. [2022-12-14 15:37:53,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-14 15:37:53,820 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 8.421052631578947) internal successors, (160), 18 states have internal predecessors, (160), 11 states have call successors, (44), 7 states have call predecessors, (44), 10 states have return successors, (45), 14 states have call predecessors, (45), 10 states have call successors, (45) Word has length 157 [2022-12-14 15:37:53,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:37:53,900 INFO L225 Difference]: With dead ends: 33643 [2022-12-14 15:37:53,900 INFO L226 Difference]: Without dead ends: 25591 [2022-12-14 15:37:53,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 410 SyntacticMatches, 5 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11562 ImplicationChecksByTransitivity, 70.3s TimeCoverageRelationStatistics Valid=1956, Invalid=31350, Unknown=0, NotChecked=0, Total=33306 [2022-12-14 15:37:53,942 INFO L413 NwaCegarLoop]: 982 mSDtfsCounter, 4438 mSDsluCounter, 6619 mSDsCounter, 0 mSdLazyCounter, 22385 mSolverCounterSat, 3506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4516 SdHoareTripleChecker+Valid, 7601 SdHoareTripleChecker+Invalid, 25891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3506 IncrementalHoareTripleChecker+Valid, 22385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:37:53,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4516 Valid, 7601 Invalid, 25891 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3506 Valid, 22385 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-12-14 15:37:53,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25591 states. [2022-12-14 15:37:55,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25591 to 22632. [2022-12-14 15:37:55,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22632 states, 17609 states have (on average 1.6328014083707194) internal successors, (28752), 18173 states have internal predecessors, (28752), 3626 states have call successors, (3626), 1123 states have call predecessors, (3626), 1396 states have return successors, (5025), 3665 states have call predecessors, (5025), 3621 states have call successors, (5025) [2022-12-14 15:37:55,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22632 states to 22632 states and 37403 transitions. [2022-12-14 15:37:55,833 INFO L78 Accepts]: Start accepts. Automaton has 22632 states and 37403 transitions. Word has length 157 [2022-12-14 15:37:55,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:37:55,833 INFO L495 AbstractCegarLoop]: Abstraction has 22632 states and 37403 transitions. [2022-12-14 15:37:55,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 8.421052631578947) internal successors, (160), 18 states have internal predecessors, (160), 11 states have call successors, (44), 7 states have call predecessors, (44), 10 states have return successors, (45), 14 states have call predecessors, (45), 10 states have call successors, (45) [2022-12-14 15:37:55,833 INFO L276 IsEmpty]: Start isEmpty. Operand 22632 states and 37403 transitions. [2022-12-14 15:37:55,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-12-14 15:37:55,841 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:37:55,841 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:37:55,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 15:37:56,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:37:56,042 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:37:56,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:37:56,043 INFO L85 PathProgramCache]: Analyzing trace with hash -344564942, now seen corresponding path program 1 times [2022-12-14 15:37:56,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:37:56,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128830598] [2022-12-14 15:37:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:37:56,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:37:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:37:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 15:37:56,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:37:56,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128830598] [2022-12-14 15:37:56,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128830598] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:37:56,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830200457] [2022-12-14 15:37:56,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:37:56,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:37:56,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:37:56,234 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:37:56,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 15:37:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:37:56,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 1605 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:37:56,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:37:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-14 15:37:56,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:37:56,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830200457] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:37:56,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:37:56,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 15:37:56,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138502083] [2022-12-14 15:37:56,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:37:56,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:37:56,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:37:56,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:37:56,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:37:56,536 INFO L87 Difference]: Start difference. First operand 22632 states and 37403 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:38:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:00,954 INFO L93 Difference]: Finished difference Result 57132 states and 95668 transitions. [2022-12-14 15:38:00,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:38:00,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 155 [2022-12-14 15:38:00,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:01,058 INFO L225 Difference]: With dead ends: 57132 [2022-12-14 15:38:01,058 INFO L226 Difference]: Without dead ends: 35644 [2022-12-14 15:38:01,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:38:01,103 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 1102 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:01,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1169 Valid, 671 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 15:38:01,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35644 states. [2022-12-14 15:38:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35644 to 34400. [2022-12-14 15:38:03,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34400 states, 26818 states have (on average 1.638190767395033) internal successors, (43933), 27724 states have internal predecessors, (43933), 5491 states have call successors, (5491), 1637 states have call predecessors, (5491), 2090 states have return successors, (7942), 5478 states have call predecessors, (7942), 5486 states have call successors, (7942) [2022-12-14 15:38:03,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34400 states to 34400 states and 57366 transitions. [2022-12-14 15:38:03,689 INFO L78 Accepts]: Start accepts. Automaton has 34400 states and 57366 transitions. Word has length 155 [2022-12-14 15:38:03,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:03,690 INFO L495 AbstractCegarLoop]: Abstraction has 34400 states and 57366 transitions. [2022-12-14 15:38:03,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 3 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:38:03,690 INFO L276 IsEmpty]: Start isEmpty. Operand 34400 states and 57366 transitions. [2022-12-14 15:38:03,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-12-14 15:38:03,698 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:03,698 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 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] [2022-12-14 15:38:03,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 15:38:03,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:03,899 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:38:03,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:03,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2091715189, now seen corresponding path program 1 times [2022-12-14 15:38:03,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:38:03,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322301417] [2022-12-14 15:38:03,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:03,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:38:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 15:38:04,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:38:04,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322301417] [2022-12-14 15:38:04,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322301417] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:38:04,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329156939] [2022-12-14 15:38:04,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:04,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:04,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:38:04,189 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:38:04,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 15:38:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:04,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:38:04,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-14 15:38:04,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:04,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329156939] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:04,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:38:04,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 15:38:04,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706066314] [2022-12-14 15:38:04,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:04,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:38:04,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:38:04,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:38:04,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:38:04,483 INFO L87 Difference]: Start difference. First operand 34400 states and 57366 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:38:09,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:09,820 INFO L93 Difference]: Finished difference Result 91061 states and 154646 transitions. [2022-12-14 15:38:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:38:09,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 156 [2022-12-14 15:38:09,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:10,074 INFO L225 Difference]: With dead ends: 91061 [2022-12-14 15:38:10,074 INFO L226 Difference]: Without dead ends: 57808 [2022-12-14 15:38:10,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:38:10,159 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 1087 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:10,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1153 Valid, 686 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 15:38:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57808 states. [2022-12-14 15:38:13,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57808 to 56295. [2022-12-14 15:38:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56295 states, 44047 states have (on average 1.642154970826617) internal successors, (72332), 45740 states have internal predecessors, (72332), 8702 states have call successors, (8702), 2665 states have call predecessors, (8702), 3545 states have return successors, (13893), 8593 states have call predecessors, (13893), 8697 states have call successors, (13893) [2022-12-14 15:38:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56295 states to 56295 states and 94927 transitions. [2022-12-14 15:38:14,263 INFO L78 Accepts]: Start accepts. Automaton has 56295 states and 94927 transitions. Word has length 156 [2022-12-14 15:38:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:14,264 INFO L495 AbstractCegarLoop]: Abstraction has 56295 states and 94927 transitions. [2022-12-14 15:38:14,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 3 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:38:14,264 INFO L276 IsEmpty]: Start isEmpty. Operand 56295 states and 94927 transitions. [2022-12-14 15:38:14,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 15:38:14,275 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:14,276 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 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] [2022-12-14 15:38:14,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 15:38:14,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 15:38:14,477 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:38:14,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:14,478 INFO L85 PathProgramCache]: Analyzing trace with hash -418794092, now seen corresponding path program 1 times [2022-12-14 15:38:14,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:38:14,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418447288] [2022-12-14 15:38:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:14,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:38:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 15:38:14,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:38:14,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418447288] [2022-12-14 15:38:14,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418447288] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:38:14,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313564171] [2022-12-14 15:38:14,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:14,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:14,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:38:14,729 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:38:14,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 15:38:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:14,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1609 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:38:14,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-14 15:38:15,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:15,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313564171] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:15,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:38:15,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 15:38:15,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910818872] [2022-12-14 15:38:15,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:15,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:38:15,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:38:15,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:38:15,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:38:15,047 INFO L87 Difference]: Start difference. First operand 56295 states and 94927 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:38:23,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:23,786 INFO L93 Difference]: Finished difference Result 156974 states and 272064 transitions. [2022-12-14 15:38:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:38:23,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 157 [2022-12-14 15:38:23,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:24,180 INFO L225 Difference]: With dead ends: 156974 [2022-12-14 15:38:24,180 INFO L226 Difference]: Without dead ends: 101832 [2022-12-14 15:38:24,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:38:24,336 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 1074 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:24,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1139 Valid, 698 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 15:38:24,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101832 states. [2022-12-14 15:38:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101832 to 99697. [2022-12-14 15:38:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99697 states, 78166 states have (on average 1.6432080444182893) internal successors, (128443), 81519 states have internal predecessors, (128443), 14989 states have call successors, (14989), 4721 states have call predecessors, (14989), 6541 states have return successors, (27428), 14688 states have call predecessors, (27428), 14984 states have call successors, (27428) [2022-12-14 15:38:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99697 states to 99697 states and 170860 transitions. [2022-12-14 15:38:31,673 INFO L78 Accepts]: Start accepts. Automaton has 99697 states and 170860 transitions. Word has length 157 [2022-12-14 15:38:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:38:31,673 INFO L495 AbstractCegarLoop]: Abstraction has 99697 states and 170860 transitions. [2022-12-14 15:38:31,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:38:31,673 INFO L276 IsEmpty]: Start isEmpty. Operand 99697 states and 170860 transitions. [2022-12-14 15:38:31,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-12-14 15:38:31,683 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:38:31,684 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 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] [2022-12-14 15:38:31,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 15:38:31,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 15:38:31,885 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:38:31,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:38:31,886 INFO L85 PathProgramCache]: Analyzing trace with hash -97843731, now seen corresponding path program 1 times [2022-12-14 15:38:31,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:38:31,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43854128] [2022-12-14 15:38:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:31,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:38:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 15:38:32,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:38:32,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43854128] [2022-12-14 15:38:32,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43854128] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:38:32,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530419004] [2022-12-14 15:38:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:38:32,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:38:32,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:38:32,093 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:38:32,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 15:38:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:38:32,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 1611 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:38:32,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:38:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-14 15:38:32,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:38:32,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530419004] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:38:32,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:38:32,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 15:38:32,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996684573] [2022-12-14 15:38:32,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:38:32,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:38:32,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:38:32,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:38:32,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:38:32,351 INFO L87 Difference]: Start difference. First operand 99697 states and 170860 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:38:45,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:38:45,515 INFO L93 Difference]: Finished difference Result 287588 states and 515004 transitions. [2022-12-14 15:38:45,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:38:45,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 158 [2022-12-14 15:38:45,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:38:46,303 INFO L225 Difference]: With dead ends: 287588 [2022-12-14 15:38:46,303 INFO L226 Difference]: Without dead ends: 189056 [2022-12-14 15:38:46,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:38:46,615 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 1061 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1125 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 15:38:46,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1125 Valid, 707 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 15:38:46,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189056 states. [2022-12-14 15:38:59,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189056 to 185619. [2022-12-14 15:38:59,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185619 states, 145653 states have (on average 1.6417512855897236) internal successors, (239126), 152514 states have internal predecessors, (239126), 27244 states have call successors, (27244), 8833 states have call predecessors, (27244), 12721 states have return successors, (59967), 26559 states have call predecessors, (59967), 27239 states have call successors, (59967) [2022-12-14 15:39:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185619 states to 185619 states and 326337 transitions. [2022-12-14 15:39:00,229 INFO L78 Accepts]: Start accepts. Automaton has 185619 states and 326337 transitions. Word has length 158 [2022-12-14 15:39:00,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:39:00,229 INFO L495 AbstractCegarLoop]: Abstraction has 185619 states and 326337 transitions. [2022-12-14 15:39:00,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:39:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 185619 states and 326337 transitions. [2022-12-14 15:39:00,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-12-14 15:39:00,242 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:39:00,242 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 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] [2022-12-14 15:39:00,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 15:39:00,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 15:39:00,443 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:39:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:39:00,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1261686774, now seen corresponding path program 1 times [2022-12-14 15:39:00,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:39:00,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797530482] [2022-12-14 15:39:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:39:00,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:39:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:39:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 15:39:00,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:39:00,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797530482] [2022-12-14 15:39:00,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797530482] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:39:00,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296523277] [2022-12-14 15:39:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:39:00,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:39:00,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:39:00,610 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:39:00,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 15:39:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:39:00,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 1613 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 15:39:00,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:39:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-12-14 15:39:00,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:39:00,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296523277] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:39:00,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:39:00,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2022-12-14 15:39:00,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860902235] [2022-12-14 15:39:00,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:39:00,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 15:39:00,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:39:00,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 15:39:00,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-12-14 15:39:00,902 INFO L87 Difference]: Start difference. First operand 185619 states and 326337 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:39:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 15:39:27,401 INFO L93 Difference]: Finished difference Result 547454 states and 1033315 transitions. [2022-12-14 15:39:27,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 15:39:27,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 159 [2022-12-14 15:39:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 15:39:29,418 INFO L225 Difference]: With dead ends: 547454 [2022-12-14 15:39:29,418 INFO L226 Difference]: Without dead ends: 363014 [2022-12-14 15:39:30,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-14 15:39:30,110 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 1052 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 15:39:30,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 721 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [358 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 15:39:30,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363014 states. [2022-12-14 15:39:56,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363014 to 354550. [2022-12-14 15:39:57,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354550 states, 278818 states have (on average 1.641820112044416) internal successors, (457769), 292224 states have internal predecessors, (457769), 51063 states have call successors, (51063), 17016 states have call predecessors, (51063), 24668 states have return successors, (134398), 49709 states have call predecessors, (134398), 51058 states have call successors, (134398) [2022-12-14 15:39:58,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354550 states to 354550 states and 643230 transitions. [2022-12-14 15:39:58,917 INFO L78 Accepts]: Start accepts. Automaton has 354550 states and 643230 transitions. Word has length 159 [2022-12-14 15:39:58,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 15:39:58,918 INFO L495 AbstractCegarLoop]: Abstraction has 354550 states and 643230 transitions. [2022-12-14 15:39:58,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-12-14 15:39:58,918 INFO L276 IsEmpty]: Start isEmpty. Operand 354550 states and 643230 transitions. [2022-12-14 15:39:58,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-12-14 15:39:58,954 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 15:39:58,955 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 15:39:58,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 15:39:59,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 15:39:59,156 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 15:39:59,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 15:39:59,157 INFO L85 PathProgramCache]: Analyzing trace with hash -493767838, now seen corresponding path program 1 times [2022-12-14 15:39:59,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 15:39:59,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744074790] [2022-12-14 15:39:59,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:39:59,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 15:39:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:40:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-12-14 15:40:00,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 15:40:00,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744074790] [2022-12-14 15:40:00,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744074790] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 15:40:00,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583587786] [2022-12-14 15:40:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 15:40:00,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 15:40:00,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 15:40:00,418 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 15:40:00,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_52a015ba-2fb1-48c1-894a-ee05b47d1e57/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 15:40:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 15:40:00,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1900 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 15:40:00,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 15:40:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 15:40:01,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 15:40:01,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583587786] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 15:40:01,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 15:40:01,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [21] total 32 [2022-12-14 15:40:01,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946795052] [2022-12-14 15:40:01,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 15:40:01,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 15:40:01,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 15:40:01,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 15:40:01,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-12-14 15:40:01,343 INFO L87 Difference]: Start difference. First operand 354550 states and 643230 transitions. Second operand has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 6 states have call predecessors, (26), 5 states have call successors, (26)