./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_dd21b88a-cb31-49e5-a696-146315bcc5bc/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd21b88a-cb31-49e5-a696-146315bcc5bc/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd21b88a-cb31-49e5-a696-146315bcc5bc/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd21b88a-cb31-49e5-a696-146315bcc5bc/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd21b88a-cb31-49e5-a696-146315bcc5bc/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd21b88a-cb31-49e5-a696-146315bcc5bc/bin/utaipan-I9t0OCRTmS --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 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e --- 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-8393723 [2022-11-19 07:36:04,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:36:04,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:36:04,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:36:04,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:36:04,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:36:04,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:36:04,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:36:04,740 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:36:04,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:36:04,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:36:04,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:36:04,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:36:04,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:36:04,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:36:04,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:36:04,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:36:04,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:36:04,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:36:04,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:36:04,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:36:04,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:36:04,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:36:04,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:36:04,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:36:04,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:36:04,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:36:04,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:36:04,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:36:04,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:36:04,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:36:04,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:36:04,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:36:04,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:36:04,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:36:04,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:36:04,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:36:04,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:36:04,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:36:04,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:36:04,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:36:04,797 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd21b88a-cb31-49e5-a696-146315bcc5bc/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:36:04,842 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:36:04,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:36:04,843 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:36:04,843 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:36:04,844 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:36:04,844 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:36:04,844 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:36:04,844 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:36:04,845 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:36:04,845 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:36:04,845 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:36:04,845 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:36:04,845 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:36:04,846 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:36:04,846 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:36:04,846 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:36:04,846 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:36:04,847 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:36:04,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:36:04,848 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:36:04,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:36:04,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:36:04,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:36:04,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:36:04,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:36:04,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:36:04,849 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:36:04,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:36:04,849 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:36:04,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:36:04,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:36:04,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:36:04,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:36:04,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:36:04,851 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:36:04,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:36:04,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:36:04,852 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:36:04,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:36:04,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:36:04,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:36:04,852 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_dd21b88a-cb31-49e5-a696-146315bcc5bc/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd21b88a-cb31-49e5-a696-146315bcc5bc/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1493e9da3ad278988eda47a556733ebc5ac5411d3350d76fb478293d9e5d934e [2022-11-19 07:36:05,111 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:36:05,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:36:05,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:36:05,151 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:36:05,152 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:36:05,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd21b88a-cb31-49e5-a696-146315bcc5bc/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2022-11-19 07:36:05,260 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd21b88a-cb31-49e5-a696-146315bcc5bc/bin/utaipan-I9t0OCRTmS/data/26062cd89/51633a79b54d413fa959a2fcd3c8646a/FLAGdfd14c6ce [2022-11-19 07:36:05,936 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:36:05,936 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd21b88a-cb31-49e5-a696-146315bcc5bc/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c [2022-11-19 07:36:05,955 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd21b88a-cb31-49e5-a696-146315bcc5bc/bin/utaipan-I9t0OCRTmS/data/26062cd89/51633a79b54d413fa959a2fcd3c8646a/FLAGdfd14c6ce [2022-11-19 07:36:06,159 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd21b88a-cb31-49e5-a696-146315bcc5bc/bin/utaipan-I9t0OCRTmS/data/26062cd89/51633a79b54d413fa959a2fcd3c8646a [2022-11-19 07:36:06,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:36:06,163 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:36:06,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:36:06,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:36:06,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:36:06,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:06" (1/1) ... [2022-11-19 07:36:06,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a4c7ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:06, skipping insertion in model container [2022-11-19 07:36:06,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:36:06" (1/1) ... [2022-11-19 07:36:06,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:36:06,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:36:06,579 WARN L234 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_dd21b88a-cb31-49e5-a696-146315bcc5bc/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2022-11-19 07:36:06,936 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:36:06,950 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:36:07,004 WARN L234 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_dd21b88a-cb31-49e5-a696-146315bcc5bc/sv-benchmarks/c/product-lines/elevator_spec9_product30.cil.c[11768,11781] [2022-11-19 07:36:07,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:36:07,124 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:36:07,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:07 WrapperNode [2022-11-19 07:36:07,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:36:07,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:36:07,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:36:07,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:36:07,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:07" (1/1) ... [2022-11-19 07:36:07,177 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:07" (1/1) ... [2022-11-19 07:36:07,260 INFO L138 Inliner]: procedures = 95, calls = 344, calls flagged for inlining = 27, calls inlined = 23, statements flattened = 873 [2022-11-19 07:36:07,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:36:07,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:36:07,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:36:07,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:36:07,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:07" (1/1) ... [2022-11-19 07:36:07,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:07" (1/1) ... [2022-11-19 07:36:07,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:07" (1/1) ... [2022-11-19 07:36:07,296 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:07" (1/1) ... [2022-11-19 07:36:07,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:07" (1/1) ... [2022-11-19 07:36:07,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:07" (1/1) ... [2022-11-19 07:36:07,360 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:07" (1/1) ... [2022-11-19 07:36:07,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:07" (1/1) ... [2022-11-19 07:36:07,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:36:07,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:36:07,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:36:07,372 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:36:07,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:07" (1/1) ... [2022-11-19 07:36:07,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:36:07,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd21b88a-cb31-49e5-a696-146315bcc5bc/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:07,419 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd21b88a-cb31-49e5-a696-146315bcc5bc/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:36:07,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dd21b88a-cb31-49e5-a696-146315bcc5bc/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:36:07,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:36:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-19 07:36:07,466 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-19 07:36:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-19 07:36:07,466 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-19 07:36:07,466 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-19 07:36:07,467 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-19 07:36:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-19 07:36:07,467 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-19 07:36:07,467 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-19 07:36:07,467 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-19 07:36:07,468 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-19 07:36:07,468 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-19 07:36:07,468 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 07:36:07,468 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 07:36:07,468 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 07:36:07,469 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 07:36:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-19 07:36:07,469 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-19 07:36:07,469 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-19 07:36:07,469 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-19 07:36:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-19 07:36:07,470 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-19 07:36:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-19 07:36:07,470 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-19 07:36:07,470 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-19 07:36:07,471 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-19 07:36:07,471 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-19 07:36:07,471 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-19 07:36:07,471 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-19 07:36:07,471 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-19 07:36:07,472 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-19 07:36:07,472 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-19 07:36:07,472 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-19 07:36:07,472 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-19 07:36:07,472 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-19 07:36:07,473 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-19 07:36:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-19 07:36:07,473 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-19 07:36:07,473 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-19 07:36:07,473 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-19 07:36:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:36:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-19 07:36:07,474 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-19 07:36:07,474 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-19 07:36:07,474 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-19 07:36:07,475 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-19 07:36:07,475 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-19 07:36:07,475 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-19 07:36:07,475 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-19 07:36:07,475 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2022-11-19 07:36:07,476 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2022-11-19 07:36:07,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:36:07,476 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:36:07,476 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-19 07:36:07,476 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-19 07:36:07,652 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:36:07,655 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:36:09,003 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:36:09,895 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:36:09,895 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 07:36:09,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:09 BoogieIcfgContainer [2022-11-19 07:36:09,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:36:09,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:36:09,905 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:36:09,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:36:09,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:36:06" (1/3) ... [2022-11-19 07:36:09,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc0f4f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:36:09, skipping insertion in model container [2022-11-19 07:36:09,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:36:07" (2/3) ... [2022-11-19 07:36:09,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fc0f4f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:36:09, skipping insertion in model container [2022-11-19 07:36:09,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:36:09" (3/3) ... [2022-11-19 07:36:09,913 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product30.cil.c [2022-11-19 07:36:09,934 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:36:09,935 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:36:10,026 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:36:10,036 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;@30d43746, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:36:10,036 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:36:10,043 INFO L276 IsEmpty]: Start isEmpty. Operand has 378 states, 254 states have (on average 1.5866141732283465) internal successors, (403), 277 states have internal predecessors, (403), 96 states have call successors, (96), 26 states have call predecessors, (96), 26 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2022-11-19 07:36:10,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 07:36:10,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:10,064 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] [2022-11-19 07:36:10,065 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:10,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1920796370, now seen corresponding path program 1 times [2022-11-19 07:36:10,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:10,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004707516] [2022-11-19 07:36:10,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:10,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:10,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:10,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004707516] [2022-11-19 07:36:10,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004707516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:10,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:10,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:36:10,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943648404] [2022-11-19 07:36:10,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:10,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:36:10,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:10,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:36:10,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:36:10,672 INFO L87 Difference]: Start difference. First operand has 378 states, 254 states have (on average 1.5866141732283465) internal successors, (403), 277 states have internal predecessors, (403), 96 states have call successors, (96), 26 states have call predecessors, (96), 26 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-19 07:36:10,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:10,861 INFO L93 Difference]: Finished difference Result 396 states and 622 transitions. [2022-11-19 07:36:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:36:10,864 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 43 [2022-11-19 07:36:10,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:10,881 INFO L225 Difference]: With dead ends: 396 [2022-11-19 07:36:10,881 INFO L226 Difference]: Without dead ends: 374 [2022-11-19 07:36:10,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:36:10,888 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:10,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 549 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:36:10,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-19 07:36:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2022-11-19 07:36:11,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 252 states have (on average 1.5753968253968254) internal successors, (397), 273 states have internal predecessors, (397), 96 states have call successors, (96), 26 states have call predecessors, (96), 25 states have return successors, (91), 88 states have call predecessors, (91), 91 states have call successors, (91) [2022-11-19 07:36:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 584 transitions. [2022-11-19 07:36:11,028 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 584 transitions. Word has length 43 [2022-11-19 07:36:11,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:11,034 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 584 transitions. [2022-11-19 07:36:11,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-19 07:36:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 584 transitions. [2022-11-19 07:36:11,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 07:36:11,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:11,038 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] [2022-11-19 07:36:11,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:36:11,039 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:11,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:11,040 INFO L85 PathProgramCache]: Analyzing trace with hash -238457962, now seen corresponding path program 1 times [2022-11-19 07:36:11,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:11,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204182415] [2022-11-19 07:36:11,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:11,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:11,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:11,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204182415] [2022-11-19 07:36:11,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204182415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:11,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:11,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:36:11,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180859047] [2022-11-19 07:36:11,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:11,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:36:11,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:11,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:36:11,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:36:11,714 INFO L87 Difference]: Start difference. First operand 374 states and 584 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 07:36:14,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:14,130 INFO L93 Difference]: Finished difference Result 1210 states and 1926 transitions. [2022-11-19 07:36:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:36:14,131 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2022-11-19 07:36:14,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:14,144 INFO L225 Difference]: With dead ends: 1210 [2022-11-19 07:36:14,144 INFO L226 Difference]: Without dead ends: 852 [2022-11-19 07:36:14,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:36:14,152 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 1198 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:14,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1262 Valid, 894 Invalid, 1973 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [422 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-19 07:36:14,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-11-19 07:36:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 755. [2022-11-19 07:36:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 528 states have (on average 1.5909090909090908) internal successors, (840), 558 states have internal predecessors, (840), 179 states have call successors, (179), 46 states have call predecessors, (179), 47 states have return successors, (181), 163 states have call predecessors, (181), 174 states have call successors, (181) [2022-11-19 07:36:14,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1200 transitions. [2022-11-19 07:36:14,256 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1200 transitions. Word has length 44 [2022-11-19 07:36:14,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:14,257 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1200 transitions. [2022-11-19 07:36:14,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 07:36:14,257 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1200 transitions. [2022-11-19 07:36:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-19 07:36:14,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:14,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:14,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:36:14,263 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:14,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:14,264 INFO L85 PathProgramCache]: Analyzing trace with hash -984985736, now seen corresponding path program 1 times [2022-11-19 07:36:14,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:14,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124678312] [2022-11-19 07:36:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:14,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:14,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:14,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124678312] [2022-11-19 07:36:14,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124678312] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:14,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:14,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:36:14,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960199182] [2022-11-19 07:36:14,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:14,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:36:14,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:14,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:36:14,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:36:14,772 INFO L87 Difference]: Start difference. First operand 755 states and 1200 transitions. Second operand has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2022-11-19 07:36:18,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:18,457 INFO L93 Difference]: Finished difference Result 2572 states and 4125 transitions. [2022-11-19 07:36:18,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:36:18,458 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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 75 [2022-11-19 07:36:18,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:18,470 INFO L225 Difference]: With dead ends: 2572 [2022-11-19 07:36:18,470 INFO L226 Difference]: Without dead ends: 1833 [2022-11-19 07:36:18,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:36:18,476 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 1280 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 4324 mSolverCounterSat, 635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1352 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 4959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 635 IncrementalHoareTripleChecker+Valid, 4324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:18,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1352 Valid, 1962 Invalid, 4959 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [635 Valid, 4324 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-19 07:36:18,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1833 states. [2022-11-19 07:36:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1833 to 1680. [2022-11-19 07:36:18,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1143 states have (on average 1.5643044619422573) internal successors, (1788), 1215 states have internal predecessors, (1788), 439 states have call successors, (439), 85 states have call predecessors, (439), 97 states have return successors, (458), 412 states have call predecessors, (458), 434 states have call successors, (458) [2022-11-19 07:36:18,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 2685 transitions. [2022-11-19 07:36:18,670 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 2685 transitions. Word has length 75 [2022-11-19 07:36:18,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:18,670 INFO L495 AbstractCegarLoop]: Abstraction has 1680 states and 2685 transitions. [2022-11-19 07:36:18,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 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) [2022-11-19 07:36:18,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 2685 transitions. [2022-11-19 07:36:18,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 07:36:18,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:18,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:18,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:36:18,676 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:18,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:18,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1337377476, now seen corresponding path program 1 times [2022-11-19 07:36:18,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:18,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832263739] [2022-11-19 07:36:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:18,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:36:18,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:18,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832263739] [2022-11-19 07:36:18,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832263739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:18,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:18,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:36:18,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361702705] [2022-11-19 07:36:18,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:18,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:36:18,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:18,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:36:18,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:36:18,981 INFO L87 Difference]: Start difference. First operand 1680 states and 2685 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 07:36:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:19,474 INFO L93 Difference]: Finished difference Result 3915 states and 6340 transitions. [2022-11-19 07:36:19,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:36:19,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 76 [2022-11-19 07:36:19,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:19,504 INFO L225 Difference]: With dead ends: 3915 [2022-11-19 07:36:19,504 INFO L226 Difference]: Without dead ends: 2253 [2022-11-19 07:36:19,515 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 [2022-11-19 07:36:19,524 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 177 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:19,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2240 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:36:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2022-11-19 07:36:19,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1698. [2022-11-19 07:36:19,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1161 states have (on average 1.5555555555555556) internal successors, (1806), 1233 states have internal predecessors, (1806), 439 states have call successors, (439), 85 states have call predecessors, (439), 97 states have return successors, (458), 412 states have call predecessors, (458), 434 states have call successors, (458) [2022-11-19 07:36:19,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 2703 transitions. [2022-11-19 07:36:19,724 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 2703 transitions. Word has length 76 [2022-11-19 07:36:19,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:19,725 INFO L495 AbstractCegarLoop]: Abstraction has 1698 states and 2703 transitions. [2022-11-19 07:36:19,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-19 07:36:19,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 2703 transitions. [2022-11-19 07:36:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-19 07:36:19,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:19,729 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] [2022-11-19 07:36:19,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:36:19,731 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:19,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:19,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1193998400, now seen corresponding path program 1 times [2022-11-19 07:36:19,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:19,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282757746] [2022-11-19 07:36:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:19,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:20,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:36:20,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:20,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282757746] [2022-11-19 07:36:20,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282757746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:20,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:20,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 07:36:20,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639081534] [2022-11-19 07:36:20,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:20,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:36:20,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:20,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:36:20,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:36:20,301 INFO L87 Difference]: Start difference. First operand 1698 states and 2703 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-19 07:36:24,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:24,394 INFO L93 Difference]: Finished difference Result 4769 states and 7618 transitions. [2022-11-19 07:36:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:36:24,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 78 [2022-11-19 07:36:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:24,417 INFO L225 Difference]: With dead ends: 4769 [2022-11-19 07:36:24,417 INFO L226 Difference]: Without dead ends: 3089 [2022-11-19 07:36:24,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:36:24,429 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 1715 mSDsluCounter, 1964 mSDsCounter, 0 mSdLazyCounter, 3922 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1774 SdHoareTripleChecker+Valid, 2331 SdHoareTripleChecker+Invalid, 4509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 3922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:24,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1774 Valid, 2331 Invalid, 4509 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [587 Valid, 3922 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-19 07:36:24,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2022-11-19 07:36:24,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 2954. [2022-11-19 07:36:24,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2093 states have (on average 1.5805064500716675) internal successors, (3308), 2184 states have internal predecessors, (3308), 680 states have call successors, (680), 150 states have call predecessors, (680), 180 states have return successors, (743), 663 states have call predecessors, (743), 675 states have call successors, (743) [2022-11-19 07:36:24,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 4731 transitions. [2022-11-19 07:36:24,719 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 4731 transitions. Word has length 78 [2022-11-19 07:36:24,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:24,720 INFO L495 AbstractCegarLoop]: Abstraction has 2954 states and 4731 transitions. [2022-11-19 07:36:24,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 9 states have internal predecessors, (48), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-19 07:36:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 4731 transitions. [2022-11-19 07:36:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-19 07:36:24,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:24,724 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:24,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:36:24,724 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:24,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:24,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1996315124, now seen corresponding path program 1 times [2022-11-19 07:36:24,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:24,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63375402] [2022-11-19 07:36:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:24,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:36:25,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:25,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63375402] [2022-11-19 07:36:25,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63375402] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:25,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:25,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:36:25,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585824667] [2022-11-19 07:36:25,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:25,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:36:25,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:25,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:36:25,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:36:25,028 INFO L87 Difference]: Start difference. First operand 2954 states and 4731 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 07:36:25,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:25,431 INFO L93 Difference]: Finished difference Result 5282 states and 8482 transitions. [2022-11-19 07:36:25,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:36:25,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-11-19 07:36:25,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:25,452 INFO L225 Difference]: With dead ends: 5282 [2022-11-19 07:36:25,452 INFO L226 Difference]: Without dead ends: 3066 [2022-11-19 07:36:25,464 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 [2022-11-19 07:36:25,464 INFO L413 NwaCegarLoop]: 547 mSDtfsCounter, 7 mSDsluCounter, 2695 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 3242 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:25,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 3242 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:36:25,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2022-11-19 07:36:25,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 3024. [2022-11-19 07:36:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3024 states, 2143 states have (on average 1.566962202519832) internal successors, (3358), 2234 states have internal predecessors, (3358), 680 states have call successors, (680), 150 states have call predecessors, (680), 200 states have return successors, (793), 683 states have call predecessors, (793), 675 states have call successors, (793) [2022-11-19 07:36:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3024 states to 3024 states and 4831 transitions. [2022-11-19 07:36:25,741 INFO L78 Accepts]: Start accepts. Automaton has 3024 states and 4831 transitions. Word has length 83 [2022-11-19 07:36:25,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:25,742 INFO L495 AbstractCegarLoop]: Abstraction has 3024 states and 4831 transitions. [2022-11-19 07:36:25,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 07:36:25,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3024 states and 4831 transitions. [2022-11-19 07:36:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 07:36:25,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:25,745 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:25,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:36:25,746 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:25,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:25,746 INFO L85 PathProgramCache]: Analyzing trace with hash -591162, now seen corresponding path program 1 times [2022-11-19 07:36:25,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:25,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847978603] [2022-11-19 07:36:25,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:25,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:36:26,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:26,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847978603] [2022-11-19 07:36:26,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847978603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:26,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:26,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:36:26,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628532921] [2022-11-19 07:36:26,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:26,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:36:26,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:26,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:36:26,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:36:26,058 INFO L87 Difference]: Start difference. First operand 3024 states and 4831 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 07:36:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:26,502 INFO L93 Difference]: Finished difference Result 5388 states and 8622 transitions. [2022-11-19 07:36:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:36:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 82 [2022-11-19 07:36:26,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:26,530 INFO L225 Difference]: With dead ends: 5388 [2022-11-19 07:36:26,530 INFO L226 Difference]: Without dead ends: 3116 [2022-11-19 07:36:26,545 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 [2022-11-19 07:36:26,546 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 6 mSDsluCounter, 2710 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3261 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:26,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3261 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:36:26,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2022-11-19 07:36:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 3034. [2022-11-19 07:36:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 2153 states have (on average 1.564328843474222) internal successors, (3368), 2234 states have internal predecessors, (3368), 680 states have call successors, (680), 150 states have call predecessors, (680), 200 states have return successors, (793), 693 states have call predecessors, (793), 675 states have call successors, (793) [2022-11-19 07:36:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4841 transitions. [2022-11-19 07:36:26,785 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4841 transitions. Word has length 82 [2022-11-19 07:36:26,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:26,786 INFO L495 AbstractCegarLoop]: Abstraction has 3034 states and 4841 transitions. [2022-11-19 07:36:26,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 07:36:26,787 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4841 transitions. [2022-11-19 07:36:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-19 07:36:26,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:26,795 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:26,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:36:26,795 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:26,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:26,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1877902356, now seen corresponding path program 1 times [2022-11-19 07:36:26,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:26,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122350595] [2022-11-19 07:36:26,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:26,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:27,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:36:27,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:27,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122350595] [2022-11-19 07:36:27,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122350595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:27,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:27,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:36:27,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925778907] [2022-11-19 07:36:27,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:27,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:36:27,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:27,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:36:27,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:36:27,158 INFO L87 Difference]: Start difference. First operand 3034 states and 4841 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 07:36:27,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:27,569 INFO L93 Difference]: Finished difference Result 5406 states and 8640 transitions. [2022-11-19 07:36:27,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:36:27,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2022-11-19 07:36:27,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:27,590 INFO L225 Difference]: With dead ends: 5406 [2022-11-19 07:36:27,591 INFO L226 Difference]: Without dead ends: 3126 [2022-11-19 07:36:27,602 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 [2022-11-19 07:36:27,603 INFO L413 NwaCegarLoop]: 552 mSDtfsCounter, 6 mSDsluCounter, 2714 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3266 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:27,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 3266 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:36:27,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2022-11-19 07:36:27,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 3044. [2022-11-19 07:36:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 2163 states have (on average 1.5617198335644937) internal successors, (3378), 2234 states have internal predecessors, (3378), 680 states have call successors, (680), 150 states have call predecessors, (680), 200 states have return successors, (793), 703 states have call predecessors, (793), 675 states have call successors, (793) [2022-11-19 07:36:27,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 4851 transitions. [2022-11-19 07:36:27,889 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 4851 transitions. Word has length 83 [2022-11-19 07:36:27,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:27,889 INFO L495 AbstractCegarLoop]: Abstraction has 3044 states and 4851 transitions. [2022-11-19 07:36:27,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-19 07:36:27,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 4851 transitions. [2022-11-19 07:36:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 07:36:27,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:27,895 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:27,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:36:27,895 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:27,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:27,896 INFO L85 PathProgramCache]: Analyzing trace with hash -385724476, now seen corresponding path program 1 times [2022-11-19 07:36:27,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:27,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007928662] [2022-11-19 07:36:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:27,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:36:28,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:28,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007928662] [2022-11-19 07:36:28,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007928662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:28,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:28,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-19 07:36:28,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122666931] [2022-11-19 07:36:28,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:28,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:36:28,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:28,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:36:28,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:36:28,275 INFO L87 Difference]: Start difference. First operand 3044 states and 4851 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-19 07:36:31,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:31,312 INFO L93 Difference]: Finished difference Result 7552 states and 12115 transitions. [2022-11-19 07:36:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:36:31,313 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) Word has length 87 [2022-11-19 07:36:31,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:31,358 INFO L225 Difference]: With dead ends: 7552 [2022-11-19 07:36:31,359 INFO L226 Difference]: Without dead ends: 5022 [2022-11-19 07:36:31,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:36:31,384 INFO L413 NwaCegarLoop]: 496 mSDtfsCounter, 1689 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1844 SdHoareTripleChecker+Valid, 1365 SdHoareTripleChecker+Invalid, 3020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:31,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1844 Valid, 1365 Invalid, 3020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [672 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-19 07:36:31,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5022 states. [2022-11-19 07:36:31,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5022 to 4910. [2022-11-19 07:36:31,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4910 states, 3416 states have (on average 1.5199063231850116) internal successors, (5192), 3557 states have internal predecessors, (5192), 1147 states have call successors, (1147), 266 states have call predecessors, (1147), 346 states have return successors, (1367), 1163 states have call predecessors, (1367), 1142 states have call successors, (1367) [2022-11-19 07:36:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 7706 transitions. [2022-11-19 07:36:31,936 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 7706 transitions. Word has length 87 [2022-11-19 07:36:31,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:31,937 INFO L495 AbstractCegarLoop]: Abstraction has 4910 states and 7706 transitions. [2022-11-19 07:36:31,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 states have internal predecessors, (55), 7 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-19 07:36:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 7706 transitions. [2022-11-19 07:36:31,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-19 07:36:31,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:31,942 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:31,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:36:31,942 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:31,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:31,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1618916369, now seen corresponding path program 1 times [2022-11-19 07:36:31,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:31,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565494323] [2022-11-19 07:36:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:31,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:36:32,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:32,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565494323] [2022-11-19 07:36:32,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565494323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:32,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:32,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-19 07:36:32,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6353576] [2022-11-19 07:36:32,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:32,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:36:32,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:32,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:36:32,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:36:32,613 INFO L87 Difference]: Start difference. First operand 4910 states and 7706 transitions. Second operand has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 8 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-19 07:36:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:38,807 INFO L93 Difference]: Finished difference Result 10325 states and 16514 transitions. [2022-11-19 07:36:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-19 07:36:38,808 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 8 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 90 [2022-11-19 07:36:38,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:38,851 INFO L225 Difference]: With dead ends: 10325 [2022-11-19 07:36:38,852 INFO L226 Difference]: Without dead ends: 5841 [2022-11-19 07:36:38,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 07:36:38,885 INFO L413 NwaCegarLoop]: 486 mSDtfsCounter, 2024 mSDsluCounter, 3648 mSDsCounter, 0 mSdLazyCounter, 7682 mSolverCounterSat, 1173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2042 SdHoareTripleChecker+Valid, 4134 SdHoareTripleChecker+Invalid, 8855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1173 IncrementalHoareTripleChecker+Valid, 7682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:38,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2042 Valid, 4134 Invalid, 8855 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1173 Valid, 7682 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-19 07:36:38,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2022-11-19 07:36:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 5691. [2022-11-19 07:36:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5691 states, 4127 states have (on average 1.5294402713835715) internal successors, (6312), 4288 states have internal predecessors, (6312), 1167 states have call successors, (1167), 296 states have call predecessors, (1167), 396 states have return successors, (1387), 1183 states have call predecessors, (1387), 1162 states have call successors, (1387) [2022-11-19 07:36:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5691 states to 5691 states and 8866 transitions. [2022-11-19 07:36:39,693 INFO L78 Accepts]: Start accepts. Automaton has 5691 states and 8866 transitions. Word has length 90 [2022-11-19 07:36:39,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:39,695 INFO L495 AbstractCegarLoop]: Abstraction has 5691 states and 8866 transitions. [2022-11-19 07:36:39,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 8 states have call successors, (16), 3 states have call predecessors, (16), 6 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-19 07:36:39,695 INFO L276 IsEmpty]: Start isEmpty. Operand 5691 states and 8866 transitions. [2022-11-19 07:36:39,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-19 07:36:39,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:39,706 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:39,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:36:39,706 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:39,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:39,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1094495665, now seen corresponding path program 1 times [2022-11-19 07:36:39,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:39,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520275917] [2022-11-19 07:36:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:39,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:36:40,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:40,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520275917] [2022-11-19 07:36:40,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520275917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:40,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:40,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:36:40,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564064513] [2022-11-19 07:36:40,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:40,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:36:40,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:40,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:36:40,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:36:40,052 INFO L87 Difference]: Start difference. First operand 5691 states and 8866 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-19 07:36:43,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:43,986 INFO L93 Difference]: Finished difference Result 18506 states and 29592 transitions. [2022-11-19 07:36:43,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:36:43,987 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 90 [2022-11-19 07:36:43,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:44,187 INFO L225 Difference]: With dead ends: 18506 [2022-11-19 07:36:44,187 INFO L226 Difference]: Without dead ends: 12833 [2022-11-19 07:36:44,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:36:44,217 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 2218 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 943 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2325 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 3836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 943 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:44,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2325 Valid, 1593 Invalid, 3836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [943 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-19 07:36:44,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12833 states. [2022-11-19 07:36:45,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12833 to 11957. [2022-11-19 07:36:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11957 states, 8499 states have (on average 1.5166490175314742) internal successors, (12890), 8942 states have internal predecessors, (12890), 2644 states have call successors, (2644), 608 states have call predecessors, (2644), 813 states have return successors, (3306), 2637 states have call predecessors, (3306), 2639 states have call successors, (3306) [2022-11-19 07:36:45,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11957 states to 11957 states and 18840 transitions. [2022-11-19 07:36:45,593 INFO L78 Accepts]: Start accepts. Automaton has 11957 states and 18840 transitions. Word has length 90 [2022-11-19 07:36:45,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:45,594 INFO L495 AbstractCegarLoop]: Abstraction has 11957 states and 18840 transitions. [2022-11-19 07:36:45,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-19 07:36:45,595 INFO L276 IsEmpty]: Start isEmpty. Operand 11957 states and 18840 transitions. [2022-11-19 07:36:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-19 07:36:45,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:45,598 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:45,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:36:45,599 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:45,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:45,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1459145640, now seen corresponding path program 1 times [2022-11-19 07:36:45,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:45,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727910180] [2022-11-19 07:36:45,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:45,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:36:45,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:45,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727910180] [2022-11-19 07:36:45,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727910180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:45,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:45,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:36:45,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397837191] [2022-11-19 07:36:45,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:45,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:36:45,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:45,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:36:45,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:36:45,948 INFO L87 Difference]: Start difference. First operand 11957 states and 18840 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-19 07:36:49,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:49,164 INFO L93 Difference]: Finished difference Result 23286 states and 36876 transitions. [2022-11-19 07:36:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:36:49,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 91 [2022-11-19 07:36:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:49,245 INFO L225 Difference]: With dead ends: 23286 [2022-11-19 07:36:49,246 INFO L226 Difference]: Without dead ends: 12875 [2022-11-19 07:36:49,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:36:49,288 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 969 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 2875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:49,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1039 Valid, 1482 Invalid, 2875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-19 07:36:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12875 states. [2022-11-19 07:36:50,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12875 to 12163. [2022-11-19 07:36:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12163 states, 8643 states have (on average 1.5133634154807358) internal successors, (13080), 9114 states have internal predecessors, (13080), 2648 states have call successors, (2648), 640 states have call predecessors, (2648), 871 states have return successors, (3384), 2639 states have call predecessors, (3384), 2643 states have call successors, (3384) [2022-11-19 07:36:50,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12163 states to 12163 states and 19112 transitions. [2022-11-19 07:36:50,365 INFO L78 Accepts]: Start accepts. Automaton has 12163 states and 19112 transitions. Word has length 91 [2022-11-19 07:36:50,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:50,366 INFO L495 AbstractCegarLoop]: Abstraction has 12163 states and 19112 transitions. [2022-11-19 07:36:50,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-19 07:36:50,367 INFO L276 IsEmpty]: Start isEmpty. Operand 12163 states and 19112 transitions. [2022-11-19 07:36:50,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-19 07:36:50,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:50,371 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:50,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:36:50,371 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:50,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:50,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1341897307, now seen corresponding path program 1 times [2022-11-19 07:36:50,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:50,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714723687] [2022-11-19 07:36:50,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:50,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:36:50,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:50,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714723687] [2022-11-19 07:36:50,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714723687] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:50,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:50,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:36:50,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117444090] [2022-11-19 07:36:50,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:50,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:36:50,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:50,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:36:50,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:36:50,825 INFO L87 Difference]: Start difference. First operand 12163 states and 19112 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-19 07:36:52,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:36:52,768 INFO L93 Difference]: Finished difference Result 12289 states and 19321 transitions. [2022-11-19 07:36:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:36:52,769 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 96 [2022-11-19 07:36:52,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:36:52,834 INFO L225 Difference]: With dead ends: 12289 [2022-11-19 07:36:52,834 INFO L226 Difference]: Without dead ends: 12274 [2022-11-19 07:36:52,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:36:52,844 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 649 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:36:52,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 1800 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:36:52,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12274 states. [2022-11-19 07:36:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12274 to 12171. [2022-11-19 07:36:54,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12171 states, 8651 states have (on average 1.5128886833892035) internal successors, (13088), 9122 states have internal predecessors, (13088), 2648 states have call successors, (2648), 640 states have call predecessors, (2648), 871 states have return successors, (3384), 2639 states have call predecessors, (3384), 2643 states have call successors, (3384) [2022-11-19 07:36:54,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12171 states to 12171 states and 19120 transitions. [2022-11-19 07:36:54,093 INFO L78 Accepts]: Start accepts. Automaton has 12171 states and 19120 transitions. Word has length 96 [2022-11-19 07:36:54,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:36:54,093 INFO L495 AbstractCegarLoop]: Abstraction has 12171 states and 19120 transitions. [2022-11-19 07:36:54,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-19 07:36:54,093 INFO L276 IsEmpty]: Start isEmpty. Operand 12171 states and 19120 transitions. [2022-11-19 07:36:54,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-19 07:36:54,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:36:54,097 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:36:54,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:36:54,097 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:36:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:36:54,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1279064998, now seen corresponding path program 1 times [2022-11-19 07:36:54,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:36:54,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102618182] [2022-11-19 07:36:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:36:54,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:36:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:36:54,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:54,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102618182] [2022-11-19 07:36:54,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102618182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:36:54,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:36:54,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-19 07:36:54,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791438810] [2022-11-19 07:36:54,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:36:54,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:36:54,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:36:54,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:36:54,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:36:54,612 INFO L87 Difference]: Start difference. First operand 12171 states and 19120 transitions. Second operand has 13 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-19 07:37:01,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:01,194 INFO L93 Difference]: Finished difference Result 13281 states and 20832 transitions. [2022-11-19 07:37:01,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-19 07:37:01,197 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 100 [2022-11-19 07:37:01,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:01,283 INFO L225 Difference]: With dead ends: 13281 [2022-11-19 07:37:01,283 INFO L226 Difference]: Without dead ends: 13264 [2022-11-19 07:37:01,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 07:37:01,298 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 2552 mSDsluCounter, 3056 mSDsCounter, 0 mSdLazyCounter, 7768 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2578 SdHoareTripleChecker+Valid, 3559 SdHoareTripleChecker+Invalid, 9198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 7768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:01,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2578 Valid, 3559 Invalid, 9198 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1430 Valid, 7768 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-19 07:37:01,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13264 states. [2022-11-19 07:37:02,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13264 to 12791. [2022-11-19 07:37:02,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12791 states, 9139 states have (on average 1.520078783236678) internal successors, (13892), 9606 states have internal predecessors, (13892), 2690 states have call successors, (2690), 731 states have call predecessors, (2690), 961 states have return successors, (3437), 2684 states have call predecessors, (3437), 2685 states have call successors, (3437) [2022-11-19 07:37:02,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12791 states to 12791 states and 20019 transitions. [2022-11-19 07:37:02,792 INFO L78 Accepts]: Start accepts. Automaton has 12791 states and 20019 transitions. Word has length 100 [2022-11-19 07:37:02,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:02,793 INFO L495 AbstractCegarLoop]: Abstraction has 12791 states and 20019 transitions. [2022-11-19 07:37:02,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.545454545454546) internal successors, (61), 11 states have internal predecessors, (61), 5 states have call successors, (19), 3 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2022-11-19 07:37:02,794 INFO L276 IsEmpty]: Start isEmpty. Operand 12791 states and 20019 transitions. [2022-11-19 07:37:02,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-19 07:37:02,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:02,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:02,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:37:02,799 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:37:02,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:02,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1114040842, now seen corresponding path program 1 times [2022-11-19 07:37:02,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:37:02,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364674040] [2022-11-19 07:37:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:02,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:37:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:37:02,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:37:02,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364674040] [2022-11-19 07:37:02,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364674040] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:02,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:02,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:37:02,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019946931] [2022-11-19 07:37:02,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:02,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:02,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:37:02,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:02,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:02,983 INFO L87 Difference]: Start difference. First operand 12791 states and 20019 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:37:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:04,999 INFO L93 Difference]: Finished difference Result 35491 states and 55920 transitions. [2022-11-19 07:37:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:04,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 107 [2022-11-19 07:37:05,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:05,134 INFO L225 Difference]: With dead ends: 35491 [2022-11-19 07:37:05,135 INFO L226 Difference]: Without dead ends: 22723 [2022-11-19 07:37:05,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:05,195 INFO L413 NwaCegarLoop]: 665 mSDtfsCounter, 540 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:05,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 1193 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:37:05,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22723 states. [2022-11-19 07:37:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22723 to 22414. [2022-11-19 07:37:06,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22414 states, 16077 states have (on average 1.519873110654973) internal successors, (24435), 16942 states have internal predecessors, (24435), 4649 states have call successors, (4649), 1279 states have call predecessors, (4649), 1687 states have return successors, (6162), 4528 states have call predecessors, (6162), 4644 states have call successors, (6162) [2022-11-19 07:37:06,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22414 states to 22414 states and 35246 transitions. [2022-11-19 07:37:06,957 INFO L78 Accepts]: Start accepts. Automaton has 22414 states and 35246 transitions. Word has length 107 [2022-11-19 07:37:06,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:06,958 INFO L495 AbstractCegarLoop]: Abstraction has 22414 states and 35246 transitions. [2022-11-19 07:37:06,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:37:06,958 INFO L276 IsEmpty]: Start isEmpty. Operand 22414 states and 35246 transitions. [2022-11-19 07:37:06,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-19 07:37:06,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:06,963 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:06,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 07:37:06,964 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:37:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:06,964 INFO L85 PathProgramCache]: Analyzing trace with hash -175666144, now seen corresponding path program 1 times [2022-11-19 07:37:06,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:37:06,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228366856] [2022-11-19 07:37:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:06,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:37:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:37:07,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:37:07,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228366856] [2022-11-19 07:37:07,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228366856] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:07,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:07,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:37:07,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164909156] [2022-11-19 07:37:07,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:07,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:07,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:37:07,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:07,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:07,100 INFO L87 Difference]: Start difference. First operand 22414 states and 35246 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:37:10,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:10,621 INFO L93 Difference]: Finished difference Result 64359 states and 102160 transitions. [2022-11-19 07:37:10,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:10,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 108 [2022-11-19 07:37:10,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:10,903 INFO L225 Difference]: With dead ends: 64359 [2022-11-19 07:37:10,904 INFO L226 Difference]: Without dead ends: 41971 [2022-11-19 07:37:11,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:11,036 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 539 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:11,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 1199 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:37:11,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41971 states. [2022-11-19 07:37:14,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41971 to 41671. [2022-11-19 07:37:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41671 states, 29964 states have (on average 1.5186223468161795) internal successors, (45504), 31625 states have internal predecessors, (45504), 8567 states have call successors, (8567), 2375 states have call predecessors, (8567), 3139 states have return successors, (11920), 8216 states have call predecessors, (11920), 8562 states have call successors, (11920) [2022-11-19 07:37:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41671 states to 41671 states and 65991 transitions. [2022-11-19 07:37:14,867 INFO L78 Accepts]: Start accepts. Automaton has 41671 states and 65991 transitions. Word has length 108 [2022-11-19 07:37:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:37:14,868 INFO L495 AbstractCegarLoop]: Abstraction has 41671 states and 65991 transitions. [2022-11-19 07:37:14,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:37:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 41671 states and 65991 transitions. [2022-11-19 07:37:14,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:37:14,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:37:14,872 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:37:14,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 07:37:14,873 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:37:14,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:37:14,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1150817672, now seen corresponding path program 1 times [2022-11-19 07:37:14,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:37:14,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138484870] [2022-11-19 07:37:14,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:37:14,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:37:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:37:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:37:15,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:37:15,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138484870] [2022-11-19 07:37:15,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138484870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:37:15,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:37:15,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:37:15,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567984756] [2022-11-19 07:37:15,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:37:15,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:37:15,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:37:15,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:37:15,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:15,004 INFO L87 Difference]: Start difference. First operand 41671 states and 65991 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2022-11-19 07:37:21,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:37:21,721 INFO L93 Difference]: Finished difference Result 122126 states and 196136 transitions. [2022-11-19 07:37:21,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:37:21,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 109 [2022-11-19 07:37:21,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:37:22,445 INFO L225 Difference]: With dead ends: 122126 [2022-11-19 07:37:22,445 INFO L226 Difference]: Without dead ends: 80487 [2022-11-19 07:37:22,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:37:22,672 INFO L413 NwaCegarLoop]: 672 mSDtfsCounter, 538 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1206 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:37:22,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1206 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:37:22,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80487 states.