./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/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_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/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_31882836-b3f0-48da-b966-e4f4aa6a20c0/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 18d9c4eb49bcfbad00b16e4c52915ece2e20abb9b599480aaed1e3c1557875b0 --- 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 02:27:42,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:27:42,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:27:42,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:27:42,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:27:42,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:27:42,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:27:42,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:27:42,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:27:42,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:27:42,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:27:42,373 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:27:42,373 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:27:42,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:27:42,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:27:42,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:27:42,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:27:42,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:27:42,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:27:42,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:27:42,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:27:42,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:27:42,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:27:42,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:27:42,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:27:42,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:27:42,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:27:42,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:27:42,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:27:42,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:27:42,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:27:42,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:27:42,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:27:42,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:27:42,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:27:42,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:27:42,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:27:42,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:27:42,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:27:42,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:27:42,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:27:42,423 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:27:42,466 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:27:42,466 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:27:42,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:27:42,467 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:27:42,468 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:27:42,468 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:27:42,468 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:27:42,469 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:27:42,469 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:27:42,469 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:27:42,470 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:27:42,470 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:27:42,471 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:27:42,471 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:27:42,471 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:27:42,471 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:27:42,471 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:27:42,472 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:27:42,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:27:42,473 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:27:42,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:27:42,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:27:42,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:27:42,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:27:42,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:27:42,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:27:42,474 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:27:42,475 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:27:42,476 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:27:42,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:27:42,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:27:42,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:27:42,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:27:42,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:27:42,477 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:27:42,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:27:42,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:27:42,478 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:27:42,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:27:42,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:27:42,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:27:42,478 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_31882836-b3f0-48da-b966-e4f4aa6a20c0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 18d9c4eb49bcfbad00b16e4c52915ece2e20abb9b599480aaed1e3c1557875b0 [2022-11-03 02:27:42,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:27:42,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:27:42,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:27:42,764 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:27:42,765 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:27:42,767 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c [2022-11-03 02:27:42,824 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI/data/355dac439/4676492475644bfeb30300ba1a83eb0b/FLAGca67f1f42 [2022-11-03 02:27:43,448 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:27:43,453 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c [2022-11-03 02:27:43,485 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI/data/355dac439/4676492475644bfeb30300ba1a83eb0b/FLAGca67f1f42 [2022-11-03 02:27:43,832 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI/data/355dac439/4676492475644bfeb30300ba1a83eb0b [2022-11-03 02:27:43,834 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:27:43,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:27:43,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:27:43,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:27:43,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:27:43,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:27:43" (1/1) ... [2022-11-03 02:27:43,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6da94273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:43, skipping insertion in model container [2022-11-03 02:27:43,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:27:43" (1/1) ... [2022-11-03 02:27:43,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:27:43,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:27:44,186 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_31882836-b3f0-48da-b966-e4f4aa6a20c0/sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c[9250,9263] [2022-11-03 02:27:44,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:27:44,590 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:27:44,613 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_31882836-b3f0-48da-b966-e4f4aa6a20c0/sv-benchmarks/c/product-lines/email_spec3_productSimulator.cil.c[9250,9263] [2022-11-03 02:27:44,685 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:27:44,718 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:27:44,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:44 WrapperNode [2022-11-03 02:27:44,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:27:44,720 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:27:44,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:27:44,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:27:44,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:44" (1/1) ... [2022-11-03 02:27:44,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:44" (1/1) ... [2022-11-03 02:27:44,918 INFO L138 Inliner]: procedures = 152, calls = 292, calls flagged for inlining = 67, calls inlined = 64, statements flattened = 1344 [2022-11-03 02:27:44,920 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:27:44,921 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:27:44,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:27:44,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:27:44,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:44" (1/1) ... [2022-11-03 02:27:44,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:44" (1/1) ... [2022-11-03 02:27:44,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:44" (1/1) ... [2022-11-03 02:27:44,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:44" (1/1) ... [2022-11-03 02:27:45,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:44" (1/1) ... [2022-11-03 02:27:45,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:44" (1/1) ... [2022-11-03 02:27:45,036 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:44" (1/1) ... [2022-11-03 02:27:45,045 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:44" (1/1) ... [2022-11-03 02:27:45,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:27:45,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:27:45,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:27:45,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:27:45,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:44" (1/1) ... [2022-11-03 02:27:45,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:27:45,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:45,122 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:27:45,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:27:45,174 INFO L130 BoogieDeclarations]: Found specification of procedure getClientPrivateKey [2022-11-03 02:27:45,174 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientPrivateKey [2022-11-03 02:27:45,174 INFO L130 BoogieDeclarations]: Found specification of procedure setup_chuck__before__Keys [2022-11-03 02:27:45,175 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_chuck__before__Keys [2022-11-03 02:27:45,175 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Sign [2022-11-03 02:27:45,175 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Sign [2022-11-03 02:27:45,176 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookSize [2022-11-03 02:27:45,176 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookSize [2022-11-03 02:27:45,176 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailEncryptionKey [2022-11-03 02:27:45,176 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailEncryptionKey [2022-11-03 02:27:45,176 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookAddress [2022-11-03 02:27:45,176 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookAddress [2022-11-03 02:27:45,177 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailEncryptionKey [2022-11-03 02:27:45,177 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailEncryptionKey [2022-11-03 02:27:45,177 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Verify [2022-11-03 02:27:45,177 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Verify [2022-11-03 02:27:45,177 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailTo [2022-11-03 02:27:45,178 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailTo [2022-11-03 02:27:45,178 INFO L130 BoogieDeclarations]: Found specification of procedure setup_bob__before__Keys [2022-11-03 02:27:45,178 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_bob__before__Keys [2022-11-03 02:27:45,178 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailFrom [2022-11-03 02:27:45,178 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailFrom [2022-11-03 02:27:45,178 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable [2022-11-03 02:27:45,179 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable [2022-11-03 02:27:45,179 INFO L130 BoogieDeclarations]: Found specification of procedure createClientKeyringEntry [2022-11-03 02:27:45,179 INFO L138 BoogieDeclarations]: Found implementation of procedure createClientKeyringEntry [2022-11-03 02:27:45,180 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Decrypt [2022-11-03 02:27:45,180 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Decrypt [2022-11-03 02:27:45,180 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__Encrypt [2022-11-03 02:27:45,180 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__Encrypt [2022-11-03 02:27:45,180 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailIsEncrypted [2022-11-03 02:27:45,180 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailIsEncrypted [2022-11-03 02:27:45,181 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailSignKey [2022-11-03 02:27:45,181 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailSignKey [2022-11-03 02:27:45,181 INFO L130 BoogieDeclarations]: Found specification of procedure chuckKeyAdd [2022-11-03 02:27:45,182 INFO L138 BoogieDeclarations]: Found implementation of procedure chuckKeyAdd [2022-11-03 02:27:45,182 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2022-11-03 02:27:45,182 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Forward [2022-11-03 02:27:45,182 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Forward [2022-11-03 02:27:45,182 INFO L130 BoogieDeclarations]: Found specification of procedure getEmailFrom [2022-11-03 02:27:45,183 INFO L138 BoogieDeclarations]: Found implementation of procedure getEmailFrom [2022-11-03 02:27:45,183 INFO L130 BoogieDeclarations]: Found specification of procedure queue [2022-11-03 02:27:45,183 INFO L138 BoogieDeclarations]: Found implementation of procedure queue [2022-11-03 02:27:45,184 INFO L130 BoogieDeclarations]: Found specification of procedure setClientId [2022-11-03 02:27:45,184 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientId [2022-11-03 02:27:45,185 INFO L130 BoogieDeclarations]: Found specification of procedure isReadable__before__Encrypt [2022-11-03 02:27:45,185 INFO L138 BoogieDeclarations]: Found implementation of procedure isReadable__before__Encrypt [2022-11-03 02:27:45,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:27:45,186 INFO L130 BoogieDeclarations]: Found specification of procedure isSigned [2022-11-03 02:27:45,187 INFO L138 BoogieDeclarations]: Found implementation of procedure isSigned [2022-11-03 02:27:45,187 INFO L130 BoogieDeclarations]: Found specification of procedure isKeyPairValid [2022-11-03 02:27:45,187 INFO L138 BoogieDeclarations]: Found implementation of procedure isKeyPairValid [2022-11-03 02:27:45,187 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing__before__AddressBook [2022-11-03 02:27:45,188 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing__before__AddressBook [2022-11-03 02:27:45,188 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Encrypt [2022-11-03 02:27:45,188 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Encrypt [2022-11-03 02:27:45,188 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__AutoResponder [2022-11-03 02:27:45,188 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__AutoResponder [2022-11-03 02:27:45,189 INFO L130 BoogieDeclarations]: Found specification of procedure setClientAddressBookSize [2022-11-03 02:27:45,189 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientAddressBookSize [2022-11-03 02:27:45,189 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringUser [2022-11-03 02:27:45,189 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringUser [2022-11-03 02:27:45,189 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 02:27:45,190 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 02:27:45,190 INFO L130 BoogieDeclarations]: Found specification of procedure setClientKeyringPublicKey [2022-11-03 02:27:45,190 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientKeyringPublicKey [2022-11-03 02:27:45,190 INFO L130 BoogieDeclarations]: Found specification of procedure outgoing [2022-11-03 02:27:45,190 INFO L138 BoogieDeclarations]: Found implementation of procedure outgoing [2022-11-03 02:27:45,190 INFO L130 BoogieDeclarations]: Found specification of procedure findPublicKey [2022-11-03 02:27:45,191 INFO L138 BoogieDeclarations]: Found implementation of procedure findPublicKey [2022-11-03 02:27:45,191 INFO L130 BoogieDeclarations]: Found specification of procedure sendEmail [2022-11-03 02:27:45,191 INFO L138 BoogieDeclarations]: Found implementation of procedure sendEmail [2022-11-03 02:27:45,191 INFO L130 BoogieDeclarations]: Found specification of procedure isEncrypted [2022-11-03 02:27:45,191 INFO L138 BoogieDeclarations]: Found implementation of procedure isEncrypted [2022-11-03 02:27:45,191 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rjh__before__Keys [2022-11-03 02:27:45,192 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rjh__before__Keys [2022-11-03 02:27:45,193 INFO L130 BoogieDeclarations]: Found specification of procedure incoming__before__Verify [2022-11-03 02:27:45,193 INFO L138 BoogieDeclarations]: Found implementation of procedure incoming__before__Verify [2022-11-03 02:27:45,193 INFO L130 BoogieDeclarations]: Found specification of procedure setClientPrivateKey [2022-11-03 02:27:45,193 INFO L138 BoogieDeclarations]: Found implementation of procedure setClientPrivateKey [2022-11-03 02:27:45,194 INFO L130 BoogieDeclarations]: Found specification of procedure setEmailTo [2022-11-03 02:27:45,194 INFO L138 BoogieDeclarations]: Found implementation of procedure setEmailTo [2022-11-03 02:27:45,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:27:45,195 INFO L130 BoogieDeclarations]: Found specification of procedure generateKeyPair [2022-11-03 02:27:45,195 INFO L138 BoogieDeclarations]: Found implementation of procedure generateKeyPair [2022-11-03 02:27:45,196 INFO L130 BoogieDeclarations]: Found specification of procedure printMail__before__Sign [2022-11-03 02:27:45,196 INFO L138 BoogieDeclarations]: Found implementation of procedure printMail__before__Sign [2022-11-03 02:27:45,196 INFO L130 BoogieDeclarations]: Found specification of procedure select_one [2022-11-03 02:27:45,196 INFO L138 BoogieDeclarations]: Found implementation of procedure select_one [2022-11-03 02:27:45,196 INFO L130 BoogieDeclarations]: Found specification of procedure getClientAddressBookAddress [2022-11-03 02:27:45,196 INFO L138 BoogieDeclarations]: Found implementation of procedure getClientAddressBookAddress [2022-11-03 02:27:45,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:27:45,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:27:45,502 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:27:45,519 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:27:46,813 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:27:47,588 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:27:47,588 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:27:47,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:47 BoogieIcfgContainer [2022-11-03 02:27:47,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:27:47,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:27:47,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:27:47,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:27:47,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:27:43" (1/3) ... [2022-11-03 02:27:47,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df05fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:47, skipping insertion in model container [2022-11-03 02:27:47,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:27:44" (2/3) ... [2022-11-03 02:27:47,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df05fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:47, skipping insertion in model container [2022-11-03 02:27:47,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:47" (3/3) ... [2022-11-03 02:27:47,607 INFO L112 eAbstractionObserver]: Analyzing ICFG email_spec3_productSimulator.cil.c [2022-11-03 02:27:47,627 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:27:47,627 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:27:47,720 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:27:47,727 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;@5558d6b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:27:47,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:27:47,736 INFO L276 IsEmpty]: Start isEmpty. Operand has 390 states, 229 states have (on average 1.331877729257642) internal successors, (305), 251 states have internal predecessors, (305), 115 states have call successors, (115), 44 states have call predecessors, (115), 44 states have return successors, (115), 113 states have call predecessors, (115), 115 states have call successors, (115) [2022-11-03 02:27:47,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-03 02:27:47,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:47,764 INFO L195 NwaCegarLoop]: trace histogram [8, 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] [2022-11-03 02:27:47,764 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:47,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:47,770 INFO L85 PathProgramCache]: Analyzing trace with hash -932254766, now seen corresponding path program 1 times [2022-11-03 02:27:47,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:47,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070938583] [2022-11-03 02:27:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:47,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-03 02:27:48,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:48,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070938583] [2022-11-03 02:27:48,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070938583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:48,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:48,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:27:48,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26851828] [2022-11-03 02:27:48,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:48,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:48,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:48,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:48,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:48,551 INFO L87 Difference]: Start difference. First operand has 390 states, 229 states have (on average 1.331877729257642) internal successors, (305), 251 states have internal predecessors, (305), 115 states have call successors, (115), 44 states have call predecessors, (115), 44 states have return successors, (115), 113 states have call predecessors, (115), 115 states have call successors, (115) Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:27:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:48,955 INFO L93 Difference]: Finished difference Result 751 states and 1034 transitions. [2022-11-03 02:27:48,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:27:48,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 114 [2022-11-03 02:27:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:48,984 INFO L225 Difference]: With dead ends: 751 [2022-11-03 02:27:48,985 INFO L226 Difference]: Without dead ends: 386 [2022-11-03 02:27:49,001 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 02:27:49,007 INFO L413 NwaCegarLoop]: 476 mSDtfsCounter, 6 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:49,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1422 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:27:49,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-11-03 02:27:49,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2022-11-03 02:27:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 227 states have (on average 1.2907488986784141) internal successors, (293), 247 states have internal predecessors, (293), 115 states have call successors, (115), 44 states have call predecessors, (115), 43 states have return successors, (112), 111 states have call predecessors, (112), 112 states have call successors, (112) [2022-11-03 02:27:49,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 520 transitions. [2022-11-03 02:27:49,085 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 520 transitions. Word has length 114 [2022-11-03 02:27:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:49,087 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 520 transitions. [2022-11-03 02:27:49,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:27:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 520 transitions. [2022-11-03 02:27:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-03 02:27:49,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:49,110 INFO L195 NwaCegarLoop]: trace histogram [8, 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] [2022-11-03 02:27:49,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:27:49,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:49,111 INFO L85 PathProgramCache]: Analyzing trace with hash -524970629, now seen corresponding path program 1 times [2022-11-03 02:27:49,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:49,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710345275] [2022-11-03 02:27:49,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:49,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:49,408 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-03 02:27:49,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:49,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710345275] [2022-11-03 02:27:49,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710345275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:49,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:49,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:27:49,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842674096] [2022-11-03 02:27:49,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:49,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:27:49,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:49,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:27:49,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:49,412 INFO L87 Difference]: Start difference. First operand 386 states and 520 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 02:27:49,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:49,615 INFO L93 Difference]: Finished difference Result 745 states and 1014 transitions. [2022-11-03 02:27:49,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:27:49,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 120 [2022-11-03 02:27:49,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:49,619 INFO L225 Difference]: With dead ends: 745 [2022-11-03 02:27:49,619 INFO L226 Difference]: Without dead ends: 386 [2022-11-03 02:27:49,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:49,627 INFO L413 NwaCegarLoop]: 455 mSDtfsCounter, 487 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:49,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 469 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:27:49,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-11-03 02:27:49,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2022-11-03 02:27:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 228 states have (on average 1.2719298245614035) internal successors, (290), 246 states have internal predecessors, (290), 113 states have call successors, (113), 45 states have call predecessors, (113), 44 states have return successors, (110), 109 states have call predecessors, (110), 110 states have call successors, (110) [2022-11-03 02:27:49,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 513 transitions. [2022-11-03 02:27:49,692 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 513 transitions. Word has length 120 [2022-11-03 02:27:49,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:49,694 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 513 transitions. [2022-11-03 02:27:49,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2022-11-03 02:27:49,695 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 513 transitions. [2022-11-03 02:27:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 02:27:49,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:49,701 INFO L195 NwaCegarLoop]: trace histogram [8, 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] [2022-11-03 02:27:49,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:27:49,701 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:49,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:49,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1215064972, now seen corresponding path program 1 times [2022-11-03 02:27:49,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:49,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762747250] [2022-11-03 02:27:49,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:49,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-03 02:27:49,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:49,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762747250] [2022-11-03 02:27:49,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762747250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:49,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:49,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:27:49,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605946986] [2022-11-03 02:27:49,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:49,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:27:49,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:49,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:27:49,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:49,894 INFO L87 Difference]: Start difference. First operand 386 states and 513 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:27:50,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:50,058 INFO L93 Difference]: Finished difference Result 739 states and 993 transitions. [2022-11-03 02:27:50,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:27:50,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 126 [2022-11-03 02:27:50,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:50,064 INFO L225 Difference]: With dead ends: 739 [2022-11-03 02:27:50,064 INFO L226 Difference]: Without dead ends: 384 [2022-11-03 02:27:50,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:50,077 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 468 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:50,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 482 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:27:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-03 02:27:50,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2022-11-03 02:27:50,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 228 states have (on average 1.2587719298245614) internal successors, (287), 244 states have internal predecessors, (287), 111 states have call successors, (111), 45 states have call predecessors, (111), 44 states have return successors, (108), 107 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-03 02:27:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 506 transitions. [2022-11-03 02:27:50,130 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 506 transitions. Word has length 126 [2022-11-03 02:27:50,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:50,131 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 506 transitions. [2022-11-03 02:27:50,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:27:50,137 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 506 transitions. [2022-11-03 02:27:50,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 02:27:50,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:50,140 INFO L195 NwaCegarLoop]: trace histogram [8, 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] [2022-11-03 02:27:50,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:27:50,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:50,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:50,142 INFO L85 PathProgramCache]: Analyzing trace with hash 145443773, now seen corresponding path program 1 times [2022-11-03 02:27:50,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:50,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217957190] [2022-11-03 02:27:50,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:50,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:50,285 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-03 02:27:50,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:50,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217957190] [2022-11-03 02:27:50,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217957190] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:50,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:50,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:27:50,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476170756] [2022-11-03 02:27:50,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:50,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:27:50,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:50,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:27:50,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:50,289 INFO L87 Difference]: Start difference. First operand 384 states and 506 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:27:50,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:50,448 INFO L93 Difference]: Finished difference Result 731 states and 960 transitions. [2022-11-03 02:27:50,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:27:50,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 127 [2022-11-03 02:27:50,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:50,452 INFO L225 Difference]: With dead ends: 731 [2022-11-03 02:27:50,452 INFO L226 Difference]: Without dead ends: 387 [2022-11-03 02:27:50,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:50,459 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 449 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:50,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [449 Valid, 465 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:27:50,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-11-03 02:27:50,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 381. [2022-11-03 02:27:50,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 228 states have (on average 1.2105263157894737) internal successors, (276), 239 states have internal predecessors, (276), 108 states have call successors, (108), 45 states have call predecessors, (108), 44 states have return successors, (105), 104 states have call predecessors, (105), 105 states have call successors, (105) [2022-11-03 02:27:50,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 489 transitions. [2022-11-03 02:27:50,505 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 489 transitions. Word has length 127 [2022-11-03 02:27:50,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:50,505 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 489 transitions. [2022-11-03 02:27:50,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 02:27:50,506 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 489 transitions. [2022-11-03 02:27:50,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-11-03 02:27:50,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:50,509 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:50,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:27:50,510 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:50,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:50,511 INFO L85 PathProgramCache]: Analyzing trace with hash 438974621, now seen corresponding path program 1 times [2022-11-03 02:27:50,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:50,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424728974] [2022-11-03 02:27:50,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:50,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:27:50,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:50,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424728974] [2022-11-03 02:27:50,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424728974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:50,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:50,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:27:50,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517024431] [2022-11-03 02:27:50,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:50,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:27:50,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:50,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:27:50,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:50,710 INFO L87 Difference]: Start difference. First operand 381 states and 489 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:27:50,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:50,862 INFO L93 Difference]: Finished difference Result 607 states and 773 transitions. [2022-11-03 02:27:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:27:50,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 139 [2022-11-03 02:27:50,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:50,866 INFO L225 Difference]: With dead ends: 607 [2022-11-03 02:27:50,867 INFO L226 Difference]: Without dead ends: 383 [2022-11-03 02:27:50,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:50,870 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 0 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:50,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 871 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:27:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-11-03 02:27:50,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2022-11-03 02:27:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 230 states have (on average 1.208695652173913) internal successors, (278), 241 states have internal predecessors, (278), 108 states have call successors, (108), 45 states have call predecessors, (108), 44 states have return successors, (105), 104 states have call predecessors, (105), 105 states have call successors, (105) [2022-11-03 02:27:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 491 transitions. [2022-11-03 02:27:50,905 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 491 transitions. Word has length 139 [2022-11-03 02:27:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:50,906 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 491 transitions. [2022-11-03 02:27:50,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:27:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 491 transitions. [2022-11-03 02:27:50,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-03 02:27:50,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:50,910 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:27:50,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:27:50,910 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:50,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:50,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1184590924, now seen corresponding path program 1 times [2022-11-03 02:27:50,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:50,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111305621] [2022-11-03 02:27:50,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:50,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:51,076 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:27:51,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:51,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111305621] [2022-11-03 02:27:51,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111305621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:51,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:51,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:27:51,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690237496] [2022-11-03 02:27:51,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:51,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:27:51,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:51,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:27:51,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:51,078 INFO L87 Difference]: Start difference. First operand 383 states and 491 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:27:51,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:51,229 INFO L93 Difference]: Finished difference Result 766 states and 1006 transitions. [2022-11-03 02:27:51,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:27:51,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 144 [2022-11-03 02:27:51,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:51,246 INFO L225 Difference]: With dead ends: 766 [2022-11-03 02:27:51,246 INFO L226 Difference]: Without dead ends: 450 [2022-11-03 02:27:51,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:51,248 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 76 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:51,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 886 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:27:51,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-11-03 02:27:51,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 445. [2022-11-03 02:27:51,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 278 states have (on average 1.2517985611510791) internal successors, (348), 289 states have internal predecessors, (348), 122 states have call successors, (122), 45 states have call predecessors, (122), 44 states have return successors, (119), 118 states have call predecessors, (119), 119 states have call successors, (119) [2022-11-03 02:27:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 589 transitions. [2022-11-03 02:27:51,278 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 589 transitions. Word has length 144 [2022-11-03 02:27:51,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:51,279 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 589 transitions. [2022-11-03 02:27:51,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:27:51,279 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 589 transitions. [2022-11-03 02:27:51,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-03 02:27:51,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:51,282 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:27:51,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:27:51,283 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:51,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:51,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2019740080, now seen corresponding path program 1 times [2022-11-03 02:27:51,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:51,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178068209] [2022-11-03 02:27:51,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:51,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:27:51,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:51,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178068209] [2022-11-03 02:27:51,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178068209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:27:51,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968637516] [2022-11-03 02:27:51,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:51,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:51,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:51,490 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:51,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:27:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:51,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:27:51,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:27:52,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:27:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:27:52,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968637516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:27:52,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [415102464] [2022-11-03 02:27:52,184 INFO L159 IcfgInterpreter]: Started Sifa with 120 locations of interest [2022-11-03 02:27:52,185 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:27:52,189 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:27:52,195 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:27:52,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:29:58,514 INFO L197 IcfgInterpreter]: Interpreting procedure setup_rjh__before__Keys with input of size 511 for LOIs [2022-11-03 02:29:59,624 INFO L197 IcfgInterpreter]: Interpreting procedure setup_bob__before__Keys with input of size 517 for LOIs [2022-11-03 02:30:01,097 INFO L197 IcfgInterpreter]: Interpreting procedure sendEmail with input of size 281 for LOIs [2022-11-03 02:30:02,935 INFO L197 IcfgInterpreter]: Interpreting procedure select_one with input of size 458 for LOIs [2022-11-03 02:30:03,236 INFO L197 IcfgInterpreter]: Interpreting procedure setup_chuck__before__Keys with input of size 252 for LOIs [2022-11-03 02:30:03,963 INFO L197 IcfgInterpreter]: Interpreting procedure setClientId with input of size 441 for LOIs [2022-11-03 02:30:04,294 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailTo with input of size 249 for LOIs [2022-11-03 02:30:04,336 INFO L197 IcfgInterpreter]: Interpreting procedure setClientPrivateKey with input of size 448 for LOIs [2022-11-03 02:30:04,638 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing with input of size 283 for LOIs [2022-11-03 02:30:06,156 INFO L197 IcfgInterpreter]: Interpreting procedure getClientPrivateKey with input of size 241 for LOIs [2022-11-03 02:30:06,196 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing__before__Sign with input of size 297 for LOIs [2022-11-03 02:30:06,381 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing__before__AddressBook with input of size 295 for LOIs [2022-11-03 02:30:06,559 INFO L197 IcfgInterpreter]: Interpreting procedure outgoing__before__Encrypt with input of size 295 for LOIs [2022-11-03 02:30:10,667 INFO L197 IcfgInterpreter]: Interpreting procedure incoming__before__Decrypt with input of size 274 for LOIs [2022-11-03 02:30:14,838 INFO L197 IcfgInterpreter]: Interpreting procedure __automaton_fail with input of size 254 for LOIs [2022-11-03 02:30:14,872 INFO L197 IcfgInterpreter]: Interpreting procedure findPublicKey with input of size 261 for LOIs [2022-11-03 02:30:14,951 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailFrom with input of size 258 for LOIs [2022-11-03 02:30:14,994 INFO L197 IcfgInterpreter]: Interpreting procedure getEmailTo with input of size 258 for LOIs [2022-11-03 02:30:15,038 INFO L197 IcfgInterpreter]: Interpreting procedure setEmailFrom with input of size 425 for LOIs [2022-11-03 02:30:15,726 INFO L197 IcfgInterpreter]: Interpreting procedure isSigned with input of size 259 for LOIs [2022-11-03 02:30:15,793 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:31:23,741 WARN L234 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 530 DAG size of output: 522 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:31:30,570 WARN L234 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 534 DAG size of output: 526 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:31:40,760 WARN L234 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 441 DAG size of output: 325 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:31:46,576 WARN L234 SmtUtils]: Spent 5.52s on a formula simplification. DAG size of input: 464 DAG size of output: 345 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:31:59,321 WARN L234 SmtUtils]: Spent 11.09s on a formula simplification. DAG size of input: 751 DAG size of output: 565 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:32:19,063 WARN L234 SmtUtils]: Spent 11.65s on a formula simplification. DAG size of input: 740 DAG size of output: 569 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:32:29,164 WARN L234 SmtUtils]: Spent 8.27s on a formula simplification. DAG size of input: 746 DAG size of output: 530 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:32:38,888 WARN L234 SmtUtils]: Spent 8.78s on a formula simplification. DAG size of input: 750 DAG size of output: 540 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:32:58,979 WARN L234 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 516 DAG size of output: 328 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:34:45,420 WARN L234 SmtUtils]: Spent 7.95s on a formula simplification. DAG size of input: 522 DAG size of output: 379 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:35:07,391 WARN L234 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 506 DAG size of output: 413 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:35:25,638 WARN L234 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 511 DAG size of output: 357 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:35:26,832 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11799#(and (= ~__ste_Client_Keyring1_User2~0 0) (<= ~__SELECTED_FEATURE_Keys~0 2147483647) (= ~__ste_email_subject0~0.offset 0) (<= 0 ~__ste_email_encryptionKey1~0) (= 0 ~__ste_Client_AddressBook0_Address2~0) (= ~__ste_client_outbuffer3~0 0) (<= ~__SELECTED_FEATURE_Base~0 2147483647) (= ~__ste_Client_counter~0 0) (= ~__ste_Client_Keyring1_PublicKey2~0 0) (<= ~__ste_email_encryptionKey1~0 0) (<= ~__ste_email_isSignatureVerified1~0 0) (<= 0 (+ ~__SELECTED_FEATURE_Keys~0 2147483648)) (= ~__ste_Client_AddressBook2_Alias0~0 0) (= 0 ~__ste_email_subject0~0.base) (= ~__ste_Client_AddressBook2_Alias1~0 0) (= ~__ste_Client_Keyring2_PublicKey2~0 0) (= ~__ste_client_forwardReceiver3~0 0) (= ~__ste_client_name2~0.offset 0) (= ~__ste_client_name1~0.base 0) (<= 0 ~__ste_client_autoResponse1~0) (= ~__ste_Client_Keyring1_User0~0 0) (<= ~queued_message~0 0) (<= ~__ste_email_isSignatureVerified0~0 0) (= ~__ste_email_body1~0.offset 0) (= ~__SELECTED_FEATURE_Encrypt~0 0) (= ~__ste_Client_AddressBook1_Address2~0 0) (<= ~__ste_email_from0~0 2147483647) (= ~__ste_ClientAddressBook_size1~0 0) (= ~__ste_Client_Keyring0_PublicKey0~0 0) (= ~__ste_Email_counter~0 0) (= ~__ste_ClientKeyring_size1~0 0) (= ~__ste_email_body0~0.offset 0) (<= 0 ~__ste_email_isSigned1~0) (<= 0 (+ ~__ste_email_from0~0 2147483648)) (= ~__ste_Client_Keyring0_User2~0 0) (= ~__ste_ClientAddressBook_size0~0 0) (= ~__ste_Client_Keyring0_User1~0 0) (= ~__ste_Client_AddressBook1_Alias1~0 0) (= ~__ste_client_name1~0.offset 0) (<= 0 (+ ~__SELECTED_FEATURE_Base~0 2147483648)) (= ~__SELECTED_FEATURE_Sign~0 1) (= ~head~0.offset 0) (= ~__ste_client_name0~0.offset 0) (= ~__ste_Client_Keyring0_PublicKey2~0 0) (= ~sent_signed~0 1) (<= ~__ste_client_privateKey2~0 789) (= ~__ste_Client_Keyring1_PublicKey0~0 0) (<= ~queue_empty~0 1) (= ~__SELECTED_FEATURE_Decrypt~0 0) (<= 0 (+ ~__ste_email_signKey0~0 2147483648)) (<= 0 ~__ste_email_isEncrypted1~0) (<= ~__ste_email_signKey0~0 2147483647) (= ~__SELECTED_FEATURE_AddressBook~0 0) (= ~__ste_client_forwardReceiver2~0 0) (= ~__ste_Client_Keyring0_PublicKey1~0 0) (<= 0 ~__ste_email_isEncrypted0~0) (= ~__ste_Client_Keyring0_User0~0 0) (<= ~__ste_client_idCounter0~0 2147483647) (= ~__ste_Client_Keyring2_PublicKey1~0 0) (= ~__ste_email_body0~0.base 0) (<= ~__ste_email_isSigned0~0 1) (<= ~__ste_email_isEncrypted0~0 0) (= ~__ste_Client_AddressBook0_Alias0~0 0) (= ~__ste_email_id0~0 0) (<= ~__ste_client_autoResponse0~0 0) (= ~__ste_Client_Keyring2_User1~0 0) (= ~__ste_Client_AddressBook2_Address2~0 0) (= 3 ~chuck~0) (= ~__ste_Client_AddressBook2_Address1~0 0) (<= 0 ~__ste_email_signKey1~0) (<= 1 ~queue_empty~0) (= ~__GUIDSL_ROOT_PRODUCTION~0 1) (<= ~__ste_email_signKey1~0 0) (<= ~__ste_email_isSigned1~0 0) (= ~bob~0 1) (= ~__ste_client_forwardReceiver1~0 0) (<= 0 ~__ste_client_autoResponse0~0) (<= 0 ~queued_message~0) (= ~__ste_Client_AddressBook1_Alias2~0 0) (<= 0 ~__ste_email_isSignatureVerified1~0) (<= ~__SELECTED_FEATURE_AutoResponder~0 2147483647) (= ~__ste_client_outbuffer0~0 0) (<= 0 (+ ~__SELECTED_FEATURE_AutoResponder~0 2147483648)) (<= 789 ~__ste_client_privateKey2~0) (= ~__ste_client_forwardReceiver0~0 0) (= ~__ste_Client_Keyring2_User0~0 0) (= ~rjh~0 2) (= 0 ~__ste_Client_AddressBook0_Address1~0) (= ~__ste_Client_AddressBook2_Address0~0 0) (= ~__ste_Client_Keyring1_PublicKey1~0 0) (<= 0 ~queued_client~0) (= ~__ste_Client_Keyring2_PublicKey0~0 0) (<= 0 ~__ste_email_isSignatureVerified0~0) (= ~__ste_Client_AddressBook1_Address0~0 0) (= ~__ste_client_name2~0.base 0) (<= ~__ste_email_encryptionKey0~0 0) (= ~__ste_email_subject1~0.base 0) (= ~__ste_Client_AddressBook1_Alias0~0 0) (<= ~__SELECTED_FEATURE_Forward~0 2147483647) (= ~__ste_Client_Keyring2_User2~0 0) (= ~head~0.base 0) (= ~__ste_Client_Keyring1_User1~0 0) (= |#NULL.offset| 0) (= ~__ste_Client_AddressBook2_Alias2~0 0) (<= 0 ~__ste_email_isSigned0~0) (<= 0 (+ ~__SELECTED_FEATURE_Forward~0 2147483648)) (<= 0 ~__ste_client_autoResponse2~0) (= ~__ste_email_subject1~0.offset 0) (= ~__ste_Client_AddressBook0_Alias2~0 0) (= ~__ste_ClientKeyring_size0~0 0) (= ~__ste_Client_AddressBook1_Address1~0 0) (= 0 ~__ste_Client_AddressBook0_Address0~0) (= ~__ste_client_outbuffer1~0 0) (= ~__ste_Client_AddressBook0_Alias1~0 0) (<= ~__ste_email_isEncrypted1~0 0) (<= ~__SELECTED_FEATURE_Verify~0 2147483647) (= ~__ste_client_name0~0.base 0) (= ~__ste_email_id1~0 0) (= ~__ste_client_outbuffer2~0 0) (<= 0 (+ ~__ste_client_idCounter0~0 2147483648)) (<= 2 ~__ste_email_to0~0) (<= 0 |#StackHeapBarrier|) (<= ~__ste_email_to0~0 2) (= ~__ste_ClientAddressBook_size2~0 0) (<= ~__ste_client_autoResponse2~0 0) (= ~__ste_email_body1~0.base 0) (<= 0 (+ ~__SELECTED_FEATURE_Verify~0 2147483648)) (= ~__ste_ClientKeyring_size2~0 0) (<= 0 ~__ste_email_encryptionKey0~0) (= |#NULL.base| 0) (<= ~queued_client~0 0))' at error location [2022-11-03 02:35:26,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:35:26,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:35:26,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-03 02:35:26,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894178178] [2022-11-03 02:35:26,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:35:26,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:35:26,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:26,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:35:26,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=10978, Unknown=0, NotChecked=0, Total=11342 [2022-11-03 02:35:26,840 INFO L87 Difference]: Start difference. First operand 445 states and 589 transitions. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-03 02:35:27,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:27,238 INFO L93 Difference]: Finished difference Result 1020 states and 1419 transitions. [2022-11-03 02:35:27,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:35:27,239 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 145 [2022-11-03 02:35:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:27,244 INFO L225 Difference]: With dead ends: 1020 [2022-11-03 02:35:27,244 INFO L226 Difference]: Without dead ends: 796 [2022-11-03 02:35:27,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 327 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 310.9s TimeCoverageRelationStatistics Valid=364, Invalid=10978, Unknown=0, NotChecked=0, Total=11342 [2022-11-03 02:35:27,249 INFO L413 NwaCegarLoop]: 508 mSDtfsCounter, 418 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 1997 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:27,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 1997 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:35:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-11-03 02:35:27,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 781. [2022-11-03 02:35:27,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 535 states have (on average 1.3364485981308412) internal successors, (715), 546 states have internal predecessors, (715), 201 states have call successors, (201), 45 states have call predecessors, (201), 44 states have return successors, (198), 197 states have call predecessors, (198), 198 states have call successors, (198) [2022-11-03 02:35:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1114 transitions. [2022-11-03 02:35:27,306 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1114 transitions. Word has length 145 [2022-11-03 02:35:27,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:27,308 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 1114 transitions. [2022-11-03 02:35:27,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 2 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-03 02:35:27,308 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1114 transitions. [2022-11-03 02:35:27,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-03 02:35:27,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:27,313 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:27,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:35:27,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_31882836-b3f0-48da-b966-e4f4aa6a20c0/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:35:27,533 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:27,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:27,533 INFO L85 PathProgramCache]: Analyzing trace with hash 803323303, now seen corresponding path program 1 times [2022-11-03 02:35:27,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:27,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773485790] [2022-11-03 02:35:27,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:27,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:35:27,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:27,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773485790] [2022-11-03 02:35:27,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773485790] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:27,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:27,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:27,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827056885] [2022-11-03 02:35:27,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:27,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:27,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:27,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:27,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:27,669 INFO L87 Difference]: Start difference. First operand 781 states and 1114 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:27,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:27,852 INFO L93 Difference]: Finished difference Result 1817 states and 2647 transitions. [2022-11-03 02:35:27,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:27,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 151 [2022-11-03 02:35:27,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:27,880 INFO L225 Difference]: With dead ends: 1817 [2022-11-03 02:35:27,880 INFO L226 Difference]: Without dead ends: 1119 [2022-11-03 02:35:27,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:27,885 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 74 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:27,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 900 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:27,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2022-11-03 02:35:27,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1114. [2022-11-03 02:35:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 789 states have (on average 1.3548795944233207) internal successors, (1069), 800 states have internal predecessors, (1069), 280 states have call successors, (280), 45 states have call predecessors, (280), 44 states have return successors, (277), 276 states have call predecessors, (277), 277 states have call successors, (277) [2022-11-03 02:35:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1626 transitions. [2022-11-03 02:35:27,959 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1626 transitions. Word has length 151 [2022-11-03 02:35:27,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:27,960 INFO L495 AbstractCegarLoop]: Abstraction has 1114 states and 1626 transitions. [2022-11-03 02:35:27,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:27,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1626 transitions. [2022-11-03 02:35:27,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-11-03 02:35:27,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:27,966 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:27,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:35:27,966 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:27,967 INFO L85 PathProgramCache]: Analyzing trace with hash -164088179, now seen corresponding path program 1 times [2022-11-03 02:35:27,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:27,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008998248] [2022-11-03 02:35:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:27,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:35:28,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:28,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008998248] [2022-11-03 02:35:28,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008998248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:28,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:28,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:28,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864331329] [2022-11-03 02:35:28,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:28,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:28,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:28,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:28,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:28,083 INFO L87 Difference]: Start difference. First operand 1114 states and 1626 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:28,302 INFO L93 Difference]: Finished difference Result 2611 states and 3879 transitions. [2022-11-03 02:35:28,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:28,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 152 [2022-11-03 02:35:28,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:28,310 INFO L225 Difference]: With dead ends: 2611 [2022-11-03 02:35:28,311 INFO L226 Difference]: Without dead ends: 1620 [2022-11-03 02:35:28,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:28,316 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 72 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:28,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 882 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:28,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2022-11-03 02:35:28,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1615. [2022-11-03 02:35:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1171 states have (on average 1.3689154568744664) internal successors, (1603), 1182 states have internal predecessors, (1603), 399 states have call successors, (399), 45 states have call predecessors, (399), 44 states have return successors, (396), 395 states have call predecessors, (396), 396 states have call successors, (396) [2022-11-03 02:35:28,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 2398 transitions. [2022-11-03 02:35:28,432 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 2398 transitions. Word has length 152 [2022-11-03 02:35:28,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:28,432 INFO L495 AbstractCegarLoop]: Abstraction has 1615 states and 2398 transitions. [2022-11-03 02:35:28,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 2398 transitions. [2022-11-03 02:35:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-03 02:35:28,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:28,441 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:28,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:35:28,441 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:28,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:28,442 INFO L85 PathProgramCache]: Analyzing trace with hash 774222030, now seen corresponding path program 1 times [2022-11-03 02:35:28,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:28,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615772321] [2022-11-03 02:35:28,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:28,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:35:28,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:28,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615772321] [2022-11-03 02:35:28,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615772321] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:28,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:28,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:28,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479581609] [2022-11-03 02:35:28,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:28,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:28,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:28,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:28,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:28,573 INFO L87 Difference]: Start difference. First operand 1615 states and 2398 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:28,858 INFO L93 Difference]: Finished difference Result 3764 states and 5662 transitions. [2022-11-03 02:35:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:28,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 153 [2022-11-03 02:35:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:28,871 INFO L225 Difference]: With dead ends: 3764 [2022-11-03 02:35:28,871 INFO L226 Difference]: Without dead ends: 2370 [2022-11-03 02:35:28,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:28,876 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 70 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:28,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 875 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2022-11-03 02:35:29,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2365. [2022-11-03 02:35:29,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 1759 states have (on average 1.3791927231381467) internal successors, (2426), 1770 states have internal predecessors, (2426), 561 states have call successors, (561), 45 states have call predecessors, (561), 44 states have return successors, (558), 557 states have call predecessors, (558), 558 states have call successors, (558) [2022-11-03 02:35:29,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 3545 transitions. [2022-11-03 02:35:29,061 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 3545 transitions. Word has length 153 [2022-11-03 02:35:29,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:29,062 INFO L495 AbstractCegarLoop]: Abstraction has 2365 states and 3545 transitions. [2022-11-03 02:35:29,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:29,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 3545 transitions. [2022-11-03 02:35:29,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-03 02:35:29,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:29,074 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:29,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:35:29,075 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:29,076 INFO L85 PathProgramCache]: Analyzing trace with hash -229443819, now seen corresponding path program 1 times [2022-11-03 02:35:29,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:29,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770800605] [2022-11-03 02:35:29,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:29,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:35:29,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770800605] [2022-11-03 02:35:29,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770800605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:29,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:29,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:29,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570200073] [2022-11-03 02:35:29,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:29,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:29,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:29,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:29,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:29,205 INFO L87 Difference]: Start difference. First operand 2365 states and 3545 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:29,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:29,591 INFO L93 Difference]: Finished difference Result 5531 states and 8387 transitions. [2022-11-03 02:35:29,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:29,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 154 [2022-11-03 02:35:29,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:29,608 INFO L225 Difference]: With dead ends: 5531 [2022-11-03 02:35:29,609 INFO L226 Difference]: Without dead ends: 3558 [2022-11-03 02:35:29,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:29,615 INFO L413 NwaCegarLoop]: 450 mSDtfsCounter, 68 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:29,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 875 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:29,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2022-11-03 02:35:29,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 3553. [2022-11-03 02:35:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3553 states, 2702 states have (on average 1.3871206513693561) internal successors, (3748), 2713 states have internal predecessors, (3748), 806 states have call successors, (806), 45 states have call predecessors, (806), 44 states have return successors, (803), 802 states have call predecessors, (803), 803 states have call successors, (803) [2022-11-03 02:35:29,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3553 states to 3553 states and 5357 transitions. [2022-11-03 02:35:29,919 INFO L78 Accepts]: Start accepts. Automaton has 3553 states and 5357 transitions. Word has length 154 [2022-11-03 02:35:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:29,923 INFO L495 AbstractCegarLoop]: Abstraction has 3553 states and 5357 transitions. [2022-11-03 02:35:29,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:29,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3553 states and 5357 transitions. [2022-11-03 02:35:29,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-03 02:35:29,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:29,970 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:29,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:35:29,971 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:29,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:29,971 INFO L85 PathProgramCache]: Analyzing trace with hash -468081885, now seen corresponding path program 1 times [2022-11-03 02:35:29,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:29,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812801403] [2022-11-03 02:35:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:29,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:35:30,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:30,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812801403] [2022-11-03 02:35:30,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812801403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:30,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:30,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:30,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499324085] [2022-11-03 02:35:30,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:30,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:30,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:30,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:30,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:30,102 INFO L87 Difference]: Start difference. First operand 3553 states and 5357 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:30,630 INFO L93 Difference]: Finished difference Result 8765 states and 13326 transitions. [2022-11-03 02:35:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:30,631 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 155 [2022-11-03 02:35:30,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:30,656 INFO L225 Difference]: With dead ends: 8765 [2022-11-03 02:35:30,656 INFO L226 Difference]: Without dead ends: 5771 [2022-11-03 02:35:30,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:30,664 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 66 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:30,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 897 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5771 states. [2022-11-03 02:35:31,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5771 to 5766. [2022-11-03 02:35:31,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5766 states, 4422 states have (on average 1.3812754409769334) internal successors, (6108), 4433 states have internal predecessors, (6108), 1299 states have call successors, (1299), 45 states have call predecessors, (1299), 44 states have return successors, (1296), 1295 states have call predecessors, (1296), 1296 states have call successors, (1296) [2022-11-03 02:35:31,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5766 states to 5766 states and 8703 transitions. [2022-11-03 02:35:31,233 INFO L78 Accepts]: Start accepts. Automaton has 5766 states and 8703 transitions. Word has length 155 [2022-11-03 02:35:31,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:31,234 INFO L495 AbstractCegarLoop]: Abstraction has 5766 states and 8703 transitions. [2022-11-03 02:35:31,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:31,235 INFO L276 IsEmpty]: Start isEmpty. Operand 5766 states and 8703 transitions. [2022-11-03 02:35:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-03 02:35:31,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:31,259 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:31,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:35:31,259 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:31,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:31,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1858587840, now seen corresponding path program 1 times [2022-11-03 02:35:31,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:31,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443263879] [2022-11-03 02:35:31,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:31,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:31,425 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:35:31,425 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:31,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443263879] [2022-11-03 02:35:31,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443263879] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:31,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:31,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:31,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735565566] [2022-11-03 02:35:31,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:31,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:31,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:31,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:31,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:31,428 INFO L87 Difference]: Start difference. First operand 5766 states and 8703 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:32,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:32,208 INFO L93 Difference]: Finished difference Result 14329 states and 21870 transitions. [2022-11-03 02:35:32,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:32,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 156 [2022-11-03 02:35:32,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:32,294 INFO L225 Difference]: With dead ends: 14329 [2022-11-03 02:35:32,294 INFO L226 Difference]: Without dead ends: 9472 [2022-11-03 02:35:32,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:32,310 INFO L413 NwaCegarLoop]: 453 mSDtfsCounter, 64 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:32,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 881 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:32,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9472 states. [2022-11-03 02:35:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9472 to 9467. [2022-11-03 02:35:33,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9467 states, 7301 states have (on average 1.3846048486508697) internal successors, (10109), 7312 states have internal predecessors, (10109), 2121 states have call successors, (2121), 45 states have call predecessors, (2121), 44 states have return successors, (2118), 2117 states have call predecessors, (2118), 2118 states have call successors, (2118) [2022-11-03 02:35:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9467 states to 9467 states and 14348 transitions. [2022-11-03 02:35:33,202 INFO L78 Accepts]: Start accepts. Automaton has 9467 states and 14348 transitions. Word has length 156 [2022-11-03 02:35:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:33,203 INFO L495 AbstractCegarLoop]: Abstraction has 9467 states and 14348 transitions. [2022-11-03 02:35:33,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:33,203 INFO L276 IsEmpty]: Start isEmpty. Operand 9467 states and 14348 transitions. [2022-11-03 02:35:33,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-11-03 02:35:33,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:33,227 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:33,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:35:33,228 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:33,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:33,228 INFO L85 PathProgramCache]: Analyzing trace with hash -627771222, now seen corresponding path program 1 times [2022-11-03 02:35:33,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:33,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364172007] [2022-11-03 02:35:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:33,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:35:33,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:33,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364172007] [2022-11-03 02:35:33,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364172007] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:33,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:33,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:33,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280454643] [2022-11-03 02:35:33,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:33,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:33,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:33,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:33,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:33,345 INFO L87 Difference]: Start difference. First operand 9467 states and 14348 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:34,795 INFO L93 Difference]: Finished difference Result 23702 states and 36081 transitions. [2022-11-03 02:35:34,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:34,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 157 [2022-11-03 02:35:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:34,855 INFO L225 Difference]: With dead ends: 23702 [2022-11-03 02:35:34,855 INFO L226 Difference]: Without dead ends: 15684 [2022-11-03 02:35:34,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:34,875 INFO L413 NwaCegarLoop]: 457 mSDtfsCounter, 62 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:34,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 883 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:34,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15684 states. [2022-11-03 02:35:36,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15684 to 15679. [2022-11-03 02:35:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15679 states, 12310 states have (on average 1.3808285946385053) internal successors, (16998), 12321 states have internal predecessors, (16998), 3324 states have call successors, (3324), 45 states have call predecessors, (3324), 44 states have return successors, (3321), 3320 states have call predecessors, (3321), 3321 states have call successors, (3321) [2022-11-03 02:35:36,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15679 states to 15679 states and 23643 transitions. [2022-11-03 02:35:36,310 INFO L78 Accepts]: Start accepts. Automaton has 15679 states and 23643 transitions. Word has length 157 [2022-11-03 02:35:36,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:36,313 INFO L495 AbstractCegarLoop]: Abstraction has 15679 states and 23643 transitions. [2022-11-03 02:35:36,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:36,313 INFO L276 IsEmpty]: Start isEmpty. Operand 15679 states and 23643 transitions. [2022-11-03 02:35:36,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-03 02:35:36,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:36,339 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:36,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 02:35:36,340 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:36,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:36,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2129999464, now seen corresponding path program 1 times [2022-11-03 02:35:36,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:36,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241306713] [2022-11-03 02:35:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:36,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:35:36,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:36,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241306713] [2022-11-03 02:35:36,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241306713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:36,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:36,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:36,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790157647] [2022-11-03 02:35:36,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:36,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:36,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:36,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:36,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:36,476 INFO L87 Difference]: Start difference. First operand 15679 states and 23643 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:38,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:38,621 INFO L93 Difference]: Finished difference Result 41309 states and 62683 transitions. [2022-11-03 02:35:38,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:38,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 158 [2022-11-03 02:35:38,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:38,731 INFO L225 Difference]: With dead ends: 41309 [2022-11-03 02:35:38,731 INFO L226 Difference]: Without dead ends: 27638 [2022-11-03 02:35:38,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:38,767 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 60 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:38,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 881 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:38,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27638 states. [2022-11-03 02:35:40,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27638 to 27633. [2022-11-03 02:35:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27633 states, 21814 states have (on average 1.3775556981754837) internal successors, (30050), 21825 states have internal predecessors, (30050), 5774 states have call successors, (5774), 45 states have call predecessors, (5774), 44 states have return successors, (5771), 5770 states have call predecessors, (5771), 5771 states have call successors, (5771) [2022-11-03 02:35:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27633 states to 27633 states and 41595 transitions. [2022-11-03 02:35:40,993 INFO L78 Accepts]: Start accepts. Automaton has 27633 states and 41595 transitions. Word has length 158 [2022-11-03 02:35:40,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:40,994 INFO L495 AbstractCegarLoop]: Abstraction has 27633 states and 41595 transitions. [2022-11-03 02:35:40,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:40,995 INFO L276 IsEmpty]: Start isEmpty. Operand 27633 states and 41595 transitions. [2022-11-03 02:35:41,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-03 02:35:41,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:41,032 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:41,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 02:35:41,032 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1318638173, now seen corresponding path program 1 times [2022-11-03 02:35:41,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:41,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269618510] [2022-11-03 02:35:41,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:41,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:35:41,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:41,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269618510] [2022-11-03 02:35:41,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269618510] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:41,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:41,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:41,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709666290] [2022-11-03 02:35:41,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:41,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:41,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:41,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:41,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:41,196 INFO L87 Difference]: Start difference. First operand 27633 states and 41595 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:44,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:44,871 INFO L93 Difference]: Finished difference Result 74231 states and 112565 transitions. [2022-11-03 02:35:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:44,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 159 [2022-11-03 02:35:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:45,085 INFO L225 Difference]: With dead ends: 74231 [2022-11-03 02:35:45,085 INFO L226 Difference]: Without dead ends: 49389 [2022-11-03 02:35:45,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:45,144 INFO L413 NwaCegarLoop]: 454 mSDtfsCounter, 58 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:45,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 882 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:45,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49389 states. [2022-11-03 02:35:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49389 to 49384. [2022-11-03 02:35:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49384 states, 39052 states have (on average 1.3769589265594593) internal successors, (53773), 39063 states have internal predecessors, (53773), 10287 states have call successors, (10287), 45 states have call predecessors, (10287), 44 states have return successors, (10284), 10283 states have call predecessors, (10284), 10284 states have call successors, (10284) [2022-11-03 02:35:49,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49384 states to 49384 states and 74344 transitions. [2022-11-03 02:35:49,602 INFO L78 Accepts]: Start accepts. Automaton has 49384 states and 74344 transitions. Word has length 159 [2022-11-03 02:35:49,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:35:49,602 INFO L495 AbstractCegarLoop]: Abstraction has 49384 states and 74344 transitions. [2022-11-03 02:35:49,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand 49384 states and 74344 transitions. [2022-11-03 02:35:49,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-03 02:35:49,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:35:49,647 INFO L195 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:35:49,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 02:35:49,647 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:35:49,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:35:49,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1495828846, now seen corresponding path program 1 times [2022-11-03 02:35:49,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:35:49,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672533660] [2022-11-03 02:35:49,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:35:49,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:35:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:35:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-03 02:35:50,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:35:50,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672533660] [2022-11-03 02:35:50,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672533660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:35:50,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:35:50,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:35:50,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362576431] [2022-11-03 02:35:50,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:35:50,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:35:50,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:35:50,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:35:50,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:50,073 INFO L87 Difference]: Start difference. First operand 49384 states and 74344 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:35:55,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:35:55,227 INFO L93 Difference]: Finished difference Result 90901 states and 137229 transitions. [2022-11-03 02:35:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:35:55,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 160 [2022-11-03 02:35:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:35:55,551 INFO L225 Difference]: With dead ends: 90901 [2022-11-03 02:35:55,551 INFO L226 Difference]: Without dead ends: 90677 [2022-11-03 02:35:55,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:35:55,596 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 56 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:35:55,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 881 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:35:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90677 states.