./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_60bd660f-2078-4f14-9763-2621001882ee/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60bd660f-2078-4f14-9763-2621001882ee/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60bd660f-2078-4f14-9763-2621001882ee/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60bd660f-2078-4f14-9763-2621001882ee/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60bd660f-2078-4f14-9763-2621001882ee/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60bd660f-2078-4f14-9763-2621001882ee/bin/utaipan-7li7fVZpFI --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 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a --- 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-5e519f3 [2022-11-03 03:33:57,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 03:33:57,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 03:33:57,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 03:33:57,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 03:33:57,270 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 03:33:57,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 03:33:57,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 03:33:57,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 03:33:57,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 03:33:57,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 03:33:57,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 03:33:57,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 03:33:57,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 03:33:57,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 03:33:57,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 03:33:57,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 03:33:57,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 03:33:57,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 03:33:57,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 03:33:57,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 03:33:57,291 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 03:33:57,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 03:33:57,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 03:33:57,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 03:33:57,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 03:33:57,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 03:33:57,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 03:33:57,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 03:33:57,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 03:33:57,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 03:33:57,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 03:33:57,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 03:33:57,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 03:33:57,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 03:33:57,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 03:33:57,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 03:33:57,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 03:33:57,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 03:33:57,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 03:33:57,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 03:33:57,309 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60bd660f-2078-4f14-9763-2621001882ee/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 03:33:57,349 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 03:33:57,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 03:33:57,350 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 03:33:57,350 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 03:33:57,351 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 03:33:57,351 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 03:33:57,351 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 03:33:57,351 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 03:33:57,352 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 03:33:57,352 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 03:33:57,352 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 03:33:57,352 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 03:33:57,352 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 03:33:57,353 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 03:33:57,353 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 03:33:57,353 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 03:33:57,353 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 03:33:57,354 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 03:33:57,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 03:33:57,355 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 03:33:57,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 03:33:57,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 03:33:57,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 03:33:57,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 03:33:57,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 03:33:57,357 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 03:33:57,357 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 03:33:57,357 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 03:33:57,357 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 03:33:57,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 03:33:57,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 03:33:57,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 03:33:57,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:33:57,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 03:33:57,360 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 03:33:57,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 03:33:57,360 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 03:33:57,369 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 03:33:57,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 03:33:57,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 03:33:57,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 03:33:57,370 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_60bd660f-2078-4f14-9763-2621001882ee/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60bd660f-2078-4f14-9763-2621001882ee/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4246354e79d66df81a26382f92e3cfb9fdaf25fcf22b56dfc59f3e4dbd0d435a [2022-11-03 03:33:57,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 03:33:57,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 03:33:57,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 03:33:57,788 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 03:33:57,788 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 03:33:57,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60bd660f-2078-4f14-9763-2621001882ee/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2022-11-03 03:33:57,863 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60bd660f-2078-4f14-9763-2621001882ee/bin/utaipan-7li7fVZpFI/data/a2c877b5a/279ebccfac6f4ca4adb3e63c8a42d2d9/FLAGb42003c52 [2022-11-03 03:33:58,540 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 03:33:58,541 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60bd660f-2078-4f14-9763-2621001882ee/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c [2022-11-03 03:33:58,566 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60bd660f-2078-4f14-9763-2621001882ee/bin/utaipan-7li7fVZpFI/data/a2c877b5a/279ebccfac6f4ca4adb3e63c8a42d2d9/FLAGb42003c52 [2022-11-03 03:33:58,814 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60bd660f-2078-4f14-9763-2621001882ee/bin/utaipan-7li7fVZpFI/data/a2c877b5a/279ebccfac6f4ca4adb3e63c8a42d2d9 [2022-11-03 03:33:58,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 03:33:58,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 03:33:58,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 03:33:58,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 03:33:58,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 03:33:58,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:33:58" (1/1) ... [2022-11-03 03:33:58,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a63a934 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:58, skipping insertion in model container [2022-11-03 03:33:58,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 03:33:58" (1/1) ... [2022-11-03 03:33:58,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 03:33:58,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 03:33:59,453 WARN L230 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_60bd660f-2078-4f14-9763-2621001882ee/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2022-11-03 03:33:59,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:33:59,608 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 03:33:59,668 WARN L230 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_60bd660f-2078-4f14-9763-2621001882ee/sv-benchmarks/c/product-lines/elevator_spec2_product28.cil.c[35981,35994] [2022-11-03 03:33:59,742 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 03:33:59,781 INFO L208 MainTranslator]: Completed translation [2022-11-03 03:33:59,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:59 WrapperNode [2022-11-03 03:33:59,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 03:33:59,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 03:33:59,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 03:33:59,783 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 03:33:59,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:59" (1/1) ... [2022-11-03 03:33:59,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:59" (1/1) ... [2022-11-03 03:33:59,900 INFO L138 Inliner]: procedures = 97, calls = 348, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 1178 [2022-11-03 03:33:59,901 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 03:33:59,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 03:33:59,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 03:33:59,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 03:33:59,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:59" (1/1) ... [2022-11-03 03:33:59,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:59" (1/1) ... [2022-11-03 03:33:59,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:59" (1/1) ... [2022-11-03 03:33:59,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:59" (1/1) ... [2022-11-03 03:33:59,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:59" (1/1) ... [2022-11-03 03:33:59,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:59" (1/1) ... [2022-11-03 03:33:59,990 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:59" (1/1) ... [2022-11-03 03:33:59,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:59" (1/1) ... [2022-11-03 03:34:00,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 03:34:00,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 03:34:00,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 03:34:00,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 03:34:00,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:59" (1/1) ... [2022-11-03 03:34:00,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 03:34:00,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60bd660f-2078-4f14-9763-2621001882ee/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 03:34:00,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60bd660f-2078-4f14-9763-2621001882ee/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 03:34:00,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_60bd660f-2078-4f14-9763-2621001882ee/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 03:34:00,099 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 03:34:00,099 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 03:34:00,099 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 03:34:00,099 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 03:34:00,099 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 03:34:00,100 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 03:34:00,100 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 03:34:00,100 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 03:34:00,100 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 03:34:00,101 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 03:34:00,101 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 03:34:00,101 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 03:34:00,101 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 03:34:00,101 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 03:34:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 03:34:00,102 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 03:34:00,102 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 03:34:00,102 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 03:34:00,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 03:34:00,103 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 03:34:00,103 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 03:34:00,103 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 03:34:00,103 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 03:34:00,104 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 03:34:00,104 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 03:34:00,104 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 03:34:00,104 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 03:34:00,106 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2022-11-03 03:34:00,106 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2022-11-03 03:34:00,107 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 03:34:00,109 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 03:34:00,109 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 03:34:00,109 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 03:34:00,110 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 03:34:00,110 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 03:34:00,111 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-03 03:34:00,111 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2022-11-03 03:34:00,111 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 03:34:00,111 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 03:34:00,112 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 03:34:00,112 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 03:34:00,112 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 03:34:00,112 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 03:34:00,113 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 03:34:00,113 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 03:34:00,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 03:34:00,116 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 03:34:00,116 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 03:34:00,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 03:34:00,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 03:34:00,118 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 03:34:00,119 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 03:34:00,119 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__executivefloor [2022-11-03 03:34:00,119 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__executivefloor [2022-11-03 03:34:00,343 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 03:34:00,346 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 03:34:01,805 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 03:34:02,663 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 03:34:02,663 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 03:34:02,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:34:02 BoogieIcfgContainer [2022-11-03 03:34:02,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 03:34:02,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 03:34:02,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 03:34:02,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 03:34:02,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 03:33:58" (1/3) ... [2022-11-03 03:34:02,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b91eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:34:02, skipping insertion in model container [2022-11-03 03:34:02,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 03:33:59" (2/3) ... [2022-11-03 03:34:02,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9b91eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 03:34:02, skipping insertion in model container [2022-11-03 03:34:02,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 03:34:02" (3/3) ... [2022-11-03 03:34:02,677 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product28.cil.c [2022-11-03 03:34:02,700 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 03:34:02,700 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 03:34:02,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 03:34:02,794 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;@2057f9e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 03:34:02,794 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 03:34:02,800 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-03 03:34:02,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-03 03:34:02,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:02,814 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] [2022-11-03 03:34:02,815 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:02,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:02,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1587334211, now seen corresponding path program 1 times [2022-11-03 03:34:02,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:02,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027122809] [2022-11-03 03:34:02,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:02,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:03,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:03,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027122809] [2022-11-03 03:34:03,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027122809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:03,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:03,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 03:34:03,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676519473] [2022-11-03 03:34:03,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:03,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 03:34:03,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:03,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 03:34:03,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 03:34:03,469 INFO L87 Difference]: Start difference. First operand has 383 states, 257 states have (on average 1.5914396887159532) internal successors, (409), 280 states have internal predecessors, (409), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 03:34:03,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:03,711 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2022-11-03 03:34:03,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 03:34:03,714 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2022-11-03 03:34:03,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:03,733 INFO L225 Difference]: With dead ends: 401 [2022-11-03 03:34:03,733 INFO L226 Difference]: Without dead ends: 379 [2022-11-03 03:34:03,737 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 [2022-11-03 03:34:03,741 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:03,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 564 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:34:03,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-03 03:34:03,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-11-03 03:34:03,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 255 states have (on average 1.580392156862745) internal successors, (403), 276 states have internal predecessors, (403), 99 states have call successors, (99), 25 states have call predecessors, (99), 24 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 03:34:03,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2022-11-03 03:34:03,827 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2022-11-03 03:34:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:03,829 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2022-11-03 03:34:03,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-03 03:34:03,830 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2022-11-03 03:34:03,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 03:34:03,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:03,833 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] [2022-11-03 03:34:03,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 03:34:03,834 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:03,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:03,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1461820053, now seen corresponding path program 1 times [2022-11-03 03:34:03,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:03,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460978748] [2022-11-03 03:34:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:03,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 03:34:04,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:04,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460978748] [2022-11-03 03:34:04,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460978748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:04,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:04,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:34:04,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611225360] [2022-11-03 03:34:04,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:04,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:34:04,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:04,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:34:04,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:34:04,457 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 03:34:07,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:07,141 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2022-11-03 03:34:07,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 03:34:07,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2022-11-03 03:34:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:07,159 INFO L225 Difference]: With dead ends: 1243 [2022-11-03 03:34:07,159 INFO L226 Difference]: Without dead ends: 880 [2022-11-03 03:34:07,171 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 [2022-11-03 03:34:07,174 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 1209 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:07,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 1352 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 1401 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 03:34:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-03 03:34:07,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2022-11-03 03:34:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 556 states have (on average 1.6025179856115108) internal successors, (891), 586 states have internal predecessors, (891), 192 states have call successors, (192), 43 states have call predecessors, (192), 44 states have return successors, (194), 176 states have call predecessors, (194), 187 states have call successors, (194) [2022-11-03 03:34:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2022-11-03 03:34:07,348 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2022-11-03 03:34:07,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:07,348 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2022-11-03 03:34:07,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-03 03:34:07,349 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2022-11-03 03:34:07,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 03:34:07,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:07,356 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:07,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 03:34:07,357 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:07,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:07,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1378588201, now seen corresponding path program 1 times [2022-11-03 03:34:07,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:07,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280497598] [2022-11-03 03:34:07,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:07,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:34:07,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:07,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280497598] [2022-11-03 03:34:07,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280497598] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:07,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:07,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 03:34:07,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56986821] [2022-11-03 03:34:07,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:07,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 03:34:07,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:07,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 03:34:07,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-03 03:34:07,818 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 03:34:11,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:11,594 INFO L93 Difference]: Finished difference Result 2747 states and 4462 transitions. [2022-11-03 03:34:11,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 03:34:11,595 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 87 [2022-11-03 03:34:11,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:11,607 INFO L225 Difference]: With dead ends: 2747 [2022-11-03 03:34:11,608 INFO L226 Difference]: Without dead ends: 1970 [2022-11-03 03:34:11,613 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 [2022-11-03 03:34:11,614 INFO L413 NwaCegarLoop]: 939 mSDtfsCounter, 1340 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 4047 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1416 SdHoareTripleChecker+Valid, 2548 SdHoareTripleChecker+Invalid, 4766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 4047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:11,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1416 Valid, 2548 Invalid, 4766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 4047 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-03 03:34:11,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2022-11-03 03:34:11,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1783. [2022-11-03 03:34:11,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1211 states have (on average 1.5730800990916598) internal successors, (1905), 1283 states have internal predecessors, (1905), 479 states have call successors, (479), 80 states have call predecessors, (479), 92 states have return successors, (498), 452 states have call predecessors, (498), 474 states have call successors, (498) [2022-11-03 03:34:11,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 2882 transitions. [2022-11-03 03:34:11,826 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 2882 transitions. Word has length 87 [2022-11-03 03:34:11,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:11,827 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 2882 transitions. [2022-11-03 03:34:11,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 03:34:11,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 2882 transitions. [2022-11-03 03:34:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-03 03:34:11,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:11,832 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:11,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 03:34:11,833 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:11,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:11,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1652019250, now seen corresponding path program 1 times [2022-11-03 03:34:11,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:11,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757295371] [2022-11-03 03:34:11,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:11,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:34:12,271 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:12,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757295371] [2022-11-03 03:34:12,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757295371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:12,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:12,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 03:34:12,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360097650] [2022-11-03 03:34:12,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:12,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 03:34:12,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:12,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 03:34:12,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 03:34:12,277 INFO L87 Difference]: Start difference. First operand 1783 states and 2882 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 03:34:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:14,888 INFO L93 Difference]: Finished difference Result 4518 states and 7313 transitions. [2022-11-03 03:34:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 03:34:14,889 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 88 [2022-11-03 03:34:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:14,919 INFO L225 Difference]: With dead ends: 4518 [2022-11-03 03:34:14,919 INFO L226 Difference]: Without dead ends: 2753 [2022-11-03 03:34:14,930 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 [2022-11-03 03:34:14,939 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 1140 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 2296 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 2296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:14,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1217 Valid, 1892 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 2296 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 03:34:14,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2022-11-03 03:34:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2635. [2022-11-03 03:34:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2635 states, 1815 states have (on average 1.5801652892561984) internal successors, (2868), 1914 states have internal predecessors, (2868), 669 states have call successors, (669), 130 states have call predecessors, (669), 150 states have return successors, (716), 634 states have call predecessors, (716), 664 states have call successors, (716) [2022-11-03 03:34:15,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 4253 transitions. [2022-11-03 03:34:15,182 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 4253 transitions. Word has length 88 [2022-11-03 03:34:15,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:15,184 INFO L495 AbstractCegarLoop]: Abstraction has 2635 states and 4253 transitions. [2022-11-03 03:34:15,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2022-11-03 03:34:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 4253 transitions. [2022-11-03 03:34:15,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 03:34:15,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:15,188 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:15,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 03:34:15,188 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:15,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:15,189 INFO L85 PathProgramCache]: Analyzing trace with hash 762048878, now seen corresponding path program 1 times [2022-11-03 03:34:15,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:15,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072345336] [2022-11-03 03:34:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:15,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:34:15,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:15,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072345336] [2022-11-03 03:34:15,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072345336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:15,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:15,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 03:34:15,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519492425] [2022-11-03 03:34:15,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:15,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 03:34:15,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:15,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 03:34:15,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 03:34:15,520 INFO L87 Difference]: Start difference. First operand 2635 states and 4253 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:16,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:16,246 INFO L93 Difference]: Finished difference Result 2736 states and 4419 transitions. [2022-11-03 03:34:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:34:16,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 92 [2022-11-03 03:34:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:16,269 INFO L225 Difference]: With dead ends: 2736 [2022-11-03 03:34:16,270 INFO L226 Difference]: Without dead ends: 2721 [2022-11-03 03:34:16,272 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 [2022-11-03 03:34:16,275 INFO L413 NwaCegarLoop]: 560 mSDtfsCounter, 689 mSDsluCounter, 989 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 690 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:16,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [690 Valid, 1484 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 03:34:16,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2022-11-03 03:34:16,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2641. [2022-11-03 03:34:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2641 states, 1821 states have (on average 1.5782537067545306) internal successors, (2874), 1920 states have internal predecessors, (2874), 669 states have call successors, (669), 130 states have call predecessors, (669), 150 states have return successors, (716), 634 states have call predecessors, (716), 664 states have call successors, (716) [2022-11-03 03:34:16,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 4259 transitions. [2022-11-03 03:34:16,507 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 4259 transitions. Word has length 92 [2022-11-03 03:34:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:16,510 INFO L495 AbstractCegarLoop]: Abstraction has 2641 states and 4259 transitions. [2022-11-03 03:34:16,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-11-03 03:34:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 4259 transitions. [2022-11-03 03:34:16,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-03 03:34:16,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:16,515 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:16,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 03:34:16,515 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:16,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:16,516 INFO L85 PathProgramCache]: Analyzing trace with hash -432487050, now seen corresponding path program 1 times [2022-11-03 03:34:16,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:16,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285550887] [2022-11-03 03:34:16,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:16,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 03:34:17,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:17,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285550887] [2022-11-03 03:34:17,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285550887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:17,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:17,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-03 03:34:17,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115337468] [2022-11-03 03:34:17,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:17,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 03:34:17,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:17,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 03:34:17,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-03 03:34:17,123 INFO L87 Difference]: Start difference. First operand 2641 states and 4259 transitions. Second operand has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-03 03:34:23,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:23,804 INFO L93 Difference]: Finished difference Result 3066 states and 4901 transitions. [2022-11-03 03:34:23,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-03 03:34:23,805 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) Word has length 97 [2022-11-03 03:34:23,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:23,827 INFO L225 Difference]: With dead ends: 3066 [2022-11-03 03:34:23,827 INFO L226 Difference]: Without dead ends: 3049 [2022-11-03 03:34:23,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=375, Invalid=2277, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 03:34:23,832 INFO L413 NwaCegarLoop]: 940 mSDtfsCounter, 2632 mSDsluCounter, 3569 mSDsCounter, 0 mSdLazyCounter, 8325 mSolverCounterSat, 1596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2658 SdHoareTripleChecker+Valid, 4328 SdHoareTripleChecker+Invalid, 9921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1596 IncrementalHoareTripleChecker+Valid, 8325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:23,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2658 Valid, 4328 Invalid, 9921 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1596 Valid, 8325 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-11-03 03:34:23,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3049 states. [2022-11-03 03:34:24,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3049 to 2829. [2022-11-03 03:34:24,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 1963 states have (on average 1.577687213448803) internal successors, (3097), 2060 states have internal predecessors, (3097), 686 states have call successors, (686), 160 states have call predecessors, (686), 179 states have return successors, (737), 652 states have call predecessors, (737), 681 states have call successors, (737) [2022-11-03 03:34:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 4520 transitions. [2022-11-03 03:34:24,138 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 4520 transitions. Word has length 97 [2022-11-03 03:34:24,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:24,138 INFO L495 AbstractCegarLoop]: Abstraction has 2829 states and 4520 transitions. [2022-11-03 03:34:24,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 5 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (17), 6 states have call predecessors, (17), 4 states have call successors, (17) [2022-11-03 03:34:24,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 4520 transitions. [2022-11-03 03:34:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-03 03:34:24,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:24,142 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:24,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 03:34:24,142 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:24,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:24,143 INFO L85 PathProgramCache]: Analyzing trace with hash 117736752, now seen corresponding path program 1 times [2022-11-03 03:34:24,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:24,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182078674] [2022-11-03 03:34:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:24,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:34:24,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:24,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182078674] [2022-11-03 03:34:24,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182078674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:24,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:24,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:34:24,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73548427] [2022-11-03 03:34:24,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:24,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:34:24,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:24,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:34:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:34:24,455 INFO L87 Difference]: Start difference. First operand 2829 states and 4520 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:34:26,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:26,123 INFO L93 Difference]: Finished difference Result 7632 states and 12344 transitions. [2022-11-03 03:34:26,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:34:26,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 104 [2022-11-03 03:34:26,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:26,163 INFO L225 Difference]: With dead ends: 7632 [2022-11-03 03:34:26,163 INFO L226 Difference]: Without dead ends: 4823 [2022-11-03 03:34:26,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:34:26,185 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 1151 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:26,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1223 Valid, 966 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 03:34:26,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4823 states. [2022-11-03 03:34:26,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4823 to 4448. [2022-11-03 03:34:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4448 states, 3093 states have (on average 1.5716133204009053) internal successors, (4861), 3254 states have internal predecessors, (4861), 1068 states have call successors, (1068), 241 states have call predecessors, (1068), 286 states have return successors, (1199), 1012 states have call predecessors, (1199), 1063 states have call successors, (1199) [2022-11-03 03:34:26,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4448 states to 4448 states and 7128 transitions. [2022-11-03 03:34:26,633 INFO L78 Accepts]: Start accepts. Automaton has 4448 states and 7128 transitions. Word has length 104 [2022-11-03 03:34:26,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:26,635 INFO L495 AbstractCegarLoop]: Abstraction has 4448 states and 7128 transitions. [2022-11-03 03:34:26,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:34:26,635 INFO L276 IsEmpty]: Start isEmpty. Operand 4448 states and 7128 transitions. [2022-11-03 03:34:26,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-03 03:34:26,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:26,639 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:26,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 03:34:26,640 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:26,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:26,641 INFO L85 PathProgramCache]: Analyzing trace with hash -645408902, now seen corresponding path program 1 times [2022-11-03 03:34:26,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:26,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842353370] [2022-11-03 03:34:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:26,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:34:27,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:27,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842353370] [2022-11-03 03:34:27,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842353370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:27,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:27,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:34:27,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788449498] [2022-11-03 03:34:27,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:27,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:34:27,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:27,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:34:27,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:34:27,097 INFO L87 Difference]: Start difference. First operand 4448 states and 7128 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:34:29,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:29,104 INFO L93 Difference]: Finished difference Result 12382 states and 20190 transitions. [2022-11-03 03:34:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:34:29,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 105 [2022-11-03 03:34:29,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:29,223 INFO L225 Difference]: With dead ends: 12382 [2022-11-03 03:34:29,223 INFO L226 Difference]: Without dead ends: 7957 [2022-11-03 03:34:29,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:34:29,249 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 1138 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:29,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1209 Valid, 975 Invalid, 1109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 03:34:29,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7957 states. [2022-11-03 03:34:30,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7957 to 7495. [2022-11-03 03:34:30,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7495 states, 5225 states have (on average 1.569377990430622) internal successors, (8200), 5527 states have internal predecessors, (8200), 1770 states have call successors, (1770), 403 states have call predecessors, (1770), 499 states have return successors, (2121), 1664 states have call predecessors, (2121), 1765 states have call successors, (2121) [2022-11-03 03:34:30,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7495 states to 7495 states and 12091 transitions. [2022-11-03 03:34:30,104 INFO L78 Accepts]: Start accepts. Automaton has 7495 states and 12091 transitions. Word has length 105 [2022-11-03 03:34:30,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:30,104 INFO L495 AbstractCegarLoop]: Abstraction has 7495 states and 12091 transitions. [2022-11-03 03:34:30,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:34:30,106 INFO L276 IsEmpty]: Start isEmpty. Operand 7495 states and 12091 transitions. [2022-11-03 03:34:30,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-03 03:34:30,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:30,110 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:30,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 03:34:30,111 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:30,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:30,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1466883506, now seen corresponding path program 1 times [2022-11-03 03:34:30,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:30,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353550204] [2022-11-03 03:34:30,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:30,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:34:30,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:30,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353550204] [2022-11-03 03:34:30,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353550204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:30,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:30,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:34:30,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784982145] [2022-11-03 03:34:30,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:30,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:34:30,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:30,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:34:30,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:34:30,477 INFO L87 Difference]: Start difference. First operand 7495 states and 12091 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:34:32,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:32,970 INFO L93 Difference]: Finished difference Result 21659 states and 35934 transitions. [2022-11-03 03:34:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:34:32,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 106 [2022-11-03 03:34:32,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:33,078 INFO L225 Difference]: With dead ends: 21659 [2022-11-03 03:34:33,078 INFO L226 Difference]: Without dead ends: 14193 [2022-11-03 03:34:33,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:34:33,124 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 1125 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:33,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1195 Valid, 984 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 03:34:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14193 states. [2022-11-03 03:34:34,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14193 to 13528. [2022-11-03 03:34:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13528 states, 9436 states have (on average 1.5652818991097923) internal successors, (14770), 10034 states have internal predecessors, (14770), 3152 states have call successors, (3152), 727 states have call predecessors, (3152), 939 states have return successors, (4195), 2946 states have call predecessors, (4195), 3147 states have call successors, (4195) [2022-11-03 03:34:34,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13528 states to 13528 states and 22117 transitions. [2022-11-03 03:34:34,921 INFO L78 Accepts]: Start accepts. Automaton has 13528 states and 22117 transitions. Word has length 106 [2022-11-03 03:34:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:34,922 INFO L495 AbstractCegarLoop]: Abstraction has 13528 states and 22117 transitions. [2022-11-03 03:34:34,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:34:34,922 INFO L276 IsEmpty]: Start isEmpty. Operand 13528 states and 22117 transitions. [2022-11-03 03:34:34,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 03:34:34,927 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:34,927 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:34,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 03:34:34,928 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:34,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:34,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1771524676, now seen corresponding path program 1 times [2022-11-03 03:34:34,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:34,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611387538] [2022-11-03 03:34:34,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:34,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:34:35,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:35,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611387538] [2022-11-03 03:34:35,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611387538] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:35,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:35,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:34:35,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030637671] [2022-11-03 03:34:35,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:35,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:34:35,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:35,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:34:35,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:34:35,300 INFO L87 Difference]: Start difference. First operand 13528 states and 22117 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:34:38,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:38,514 INFO L93 Difference]: Finished difference Result 40040 states and 68589 transitions. [2022-11-03 03:34:38,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:34:38,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 107 [2022-11-03 03:34:38,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:38,692 INFO L225 Difference]: With dead ends: 40040 [2022-11-03 03:34:38,692 INFO L226 Difference]: Without dead ends: 26553 [2022-11-03 03:34:38,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:34:38,765 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 1112 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1181 SdHoareTripleChecker+Valid, 996 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:38,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1181 Valid, 996 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 03:34:38,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26553 states. [2022-11-03 03:34:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26553 to 25453. [2022-11-03 03:34:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25453 states, 17739 states have (on average 1.5597271548565308) internal successors, (27668), 18957 states have internal predecessors, (27668), 5866 states have call successors, (5866), 1375 states have call predecessors, (5866), 1847 states have return successors, (9145), 5460 states have call predecessors, (9145), 5861 states have call successors, (9145) [2022-11-03 03:34:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25453 states to 25453 states and 42679 transitions. [2022-11-03 03:34:42,153 INFO L78 Accepts]: Start accepts. Automaton has 25453 states and 42679 transitions. Word has length 107 [2022-11-03 03:34:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:42,154 INFO L495 AbstractCegarLoop]: Abstraction has 25453 states and 42679 transitions. [2022-11-03 03:34:42,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:34:42,154 INFO L276 IsEmpty]: Start isEmpty. Operand 25453 states and 42679 transitions. [2022-11-03 03:34:42,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-03 03:34:42,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:42,158 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:42,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 03:34:42,159 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:42,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash 917040692, now seen corresponding path program 1 times [2022-11-03 03:34:42,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:42,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263353600] [2022-11-03 03:34:42,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:42,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 03:34:42,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:42,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263353600] [2022-11-03 03:34:42,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263353600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:42,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:42,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:34:42,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652611923] [2022-11-03 03:34:42,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:42,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:34:42,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:42,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:34:42,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:34:42,458 INFO L87 Difference]: Start difference. First operand 25453 states and 42679 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:34:48,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:34:48,252 INFO L93 Difference]: Finished difference Result 76578 states and 138763 transitions. [2022-11-03 03:34:48,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:34:48,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 108 [2022-11-03 03:34:48,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:34:48,604 INFO L225 Difference]: With dead ends: 76578 [2022-11-03 03:34:48,604 INFO L226 Difference]: Without dead ends: 51180 [2022-11-03 03:34:48,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:34:48,795 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 1121 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1189 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:34:48,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1189 Valid, 990 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 03:34:48,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51180 states. [2022-11-03 03:34:54,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51180 to 48821. [2022-11-03 03:34:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48821 states, 34042 states have (on average 1.5571059279713295) internal successors, (53007), 36446 states have internal predecessors, (53007), 11180 states have call successors, (11180), 2661 states have call predecessors, (11180), 3598 states have return successors, (20783), 10373 states have call predecessors, (20783), 11175 states have call successors, (20783) [2022-11-03 03:34:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48821 states to 48821 states and 84970 transitions. [2022-11-03 03:34:54,909 INFO L78 Accepts]: Start accepts. Automaton has 48821 states and 84970 transitions. Word has length 108 [2022-11-03 03:34:54,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:34:54,909 INFO L495 AbstractCegarLoop]: Abstraction has 48821 states and 84970 transitions. [2022-11-03 03:34:54,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-11-03 03:34:54,910 INFO L276 IsEmpty]: Start isEmpty. Operand 48821 states and 84970 transitions. [2022-11-03 03:34:54,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 03:34:54,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:34:54,923 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:34:54,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 03:34:54,924 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:34:54,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:34:54,924 INFO L85 PathProgramCache]: Analyzing trace with hash 399502305, now seen corresponding path program 1 times [2022-11-03 03:34:54,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:34:54,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514578372] [2022-11-03 03:34:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:34:54,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:34:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 03:34:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 03:34:55,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 03:34:55,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514578372] [2022-11-03 03:34:55,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514578372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 03:34:55,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 03:34:55,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 03:34:55,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733355727] [2022-11-03 03:34:55,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 03:34:55,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 03:34:55,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 03:34:55,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 03:34:55,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 03:34:55,151 INFO L87 Difference]: Start difference. First operand 48821 states and 84970 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 03:35:00,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 03:35:00,495 INFO L93 Difference]: Finished difference Result 99308 states and 178942 transitions. [2022-11-03 03:35:00,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 03:35:00,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 156 [2022-11-03 03:35:00,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 03:35:00,809 INFO L225 Difference]: With dead ends: 99308 [2022-11-03 03:35:00,810 INFO L226 Difference]: Without dead ends: 50504 [2022-11-03 03:35:01,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 03:35:01,037 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 30 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 03:35:01,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1672 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 03:35:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50504 states. [2022-11-03 03:35:05,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50504 to 49019. [2022-11-03 03:35:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49019 states, 34240 states have (on average 1.5538843457943925) internal successors, (53205), 36644 states have internal predecessors, (53205), 11180 states have call successors, (11180), 2661 states have call predecessors, (11180), 3598 states have return successors, (20783), 10373 states have call predecessors, (20783), 11175 states have call successors, (20783) [2022-11-03 03:35:05,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49019 states to 49019 states and 85168 transitions. [2022-11-03 03:35:06,000 INFO L78 Accepts]: Start accepts. Automaton has 49019 states and 85168 transitions. Word has length 156 [2022-11-03 03:35:06,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 03:35:06,001 INFO L495 AbstractCegarLoop]: Abstraction has 49019 states and 85168 transitions. [2022-11-03 03:35:06,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 03:35:06,001 INFO L276 IsEmpty]: Start isEmpty. Operand 49019 states and 85168 transitions. [2022-11-03 03:35:06,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-03 03:35:06,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 03:35:06,016 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 03:35:06,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 03:35:06,016 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 03:35:06,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 03:35:06,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1694713205, now seen corresponding path program 1 times [2022-11-03 03:35:06,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 03:35:06,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747378360] [2022-11-03 03:35:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 03:35:06,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 03:35:06,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat