./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7 --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 c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:18:42,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:18:42,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:18:42,116 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:18:42,117 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:18:42,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:18:42,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:18:42,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:18:42,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:18:42,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:18:42,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:18:42,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:18:42,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:18:42,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:18:42,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:18:42,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:18:42,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:18:42,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:18:42,154 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:18:42,161 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:18:42,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:18:42,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:18:42,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:18:42,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:18:42,177 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:18:42,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:18:42,178 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:18:42,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:18:42,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:18:42,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:18:42,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:18:42,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:18:42,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:18:42,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:18:42,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:18:42,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:18:42,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:18:42,188 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:18:42,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:18:42,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:18:42,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:18:42,191 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:18:42,235 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:18:42,235 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:18:42,236 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:18:42,236 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:18:42,237 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:18:42,237 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:18:42,237 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:18:42,237 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:18:42,237 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:18:42,238 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:18:42,239 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:18:42,239 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:18:42,239 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:18:42,239 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:18:42,240 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:18:42,240 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:18:42,240 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:18:42,240 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:18:42,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:18:42,242 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:18:42,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:18:42,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:18:42,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:18:42,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:18:42,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:18:42,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:18:42,243 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:18:42,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:18:42,244 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:18:42,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:18:42,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:18:42,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:18:42,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:18:42,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:18:42,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:18:42,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:18:42,246 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:18:42,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:18:42,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:18:42,246 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:18:42,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:18:42,247 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c7caf1796ba4b07248be26f00733894517b89591cbeb4bf07d682989c7001a35 [2021-11-25 20:18:42,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:18:42,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:18:42,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:18:42,550 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:18:42,551 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:18:42,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-25 20:18:42,623 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/data/bfd896a5a/621ab00d957f44c9a94a636c7a51ce35/FLAG1a6877321 [2021-11-25 20:18:43,261 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:18:43,261 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c [2021-11-25 20:18:43,297 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/data/bfd896a5a/621ab00d957f44c9a94a636c7a51ce35/FLAG1a6877321 [2021-11-25 20:18:43,475 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/data/bfd896a5a/621ab00d957f44c9a94a636c7a51ce35 [2021-11-25 20:18:43,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:18:43,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:18:43,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:18:43,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:18:43,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:18:43,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:18:43" (1/1) ... [2021-11-25 20:18:43,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b2329a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:43, skipping insertion in model container [2021-11-25 20:18:43,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:18:43" (1/1) ... [2021-11-25 20:18:43,494 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:18:43,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:18:43,814 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_50248498-9dfa-497b-8066-44d6932bb9f0/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-25 20:18:44,112 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:18:44,121 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:18:44,137 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_50248498-9dfa-497b-8066-44d6932bb9f0/sv-benchmarks/c/product-lines/elevator_spec1_product29.cil.c[4117,4130] [2021-11-25 20:18:44,230 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:18:44,257 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:18:44,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:44 WrapperNode [2021-11-25 20:18:44,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:18:44,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:18:44,259 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:18:44,259 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:18:44,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:44" (1/1) ... [2021-11-25 20:18:44,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:44" (1/1) ... [2021-11-25 20:18:44,379 INFO L137 Inliner]: procedures = 93, calls = 342, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 894 [2021-11-25 20:18:44,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:18:44,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:18:44,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:18:44,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:18:44,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:44" (1/1) ... [2021-11-25 20:18:44,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:44" (1/1) ... [2021-11-25 20:18:44,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:44" (1/1) ... [2021-11-25 20:18:44,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:44" (1/1) ... [2021-11-25 20:18:44,420 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:44" (1/1) ... [2021-11-25 20:18:44,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:44" (1/1) ... [2021-11-25 20:18:44,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:44" (1/1) ... [2021-11-25 20:18:44,482 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:18:44,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:18:44,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:18:44,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:18:44,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:44" (1/1) ... [2021-11-25 20:18:44,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:18:44,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:18:44,528 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:18:44,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:18:44,586 INFO L130 BoogieDeclarations]: Found specification of procedure angelinaCall [2021-11-25 20:18:44,586 INFO L138 BoogieDeclarations]: Found implementation of procedure angelinaCall [2021-11-25 20:18:44,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:18:44,587 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 20:18:44,587 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 20:18:44,587 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-25 20:18:44,587 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-25 20:18:44,587 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 20:18:44,588 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 20:18:44,588 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 20:18:44,588 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 20:18:44,588 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 20:18:44,588 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 20:18:44,589 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-25 20:18:44,589 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-25 20:18:44,589 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 20:18:44,589 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 20:18:44,590 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 20:18:44,590 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 20:18:44,590 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-25 20:18:44,590 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-25 20:18:44,590 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 20:18:44,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 20:18:44,591 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 20:18:44,591 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 20:18:44,591 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 20:18:44,591 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 20:18:44,592 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 20:18:44,592 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 20:18:44,592 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 20:18:44,592 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 20:18:44,592 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 20:18:44,593 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 20:18:44,593 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 20:18:44,593 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 20:18:44,593 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 20:18:44,593 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 20:18:44,594 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 20:18:44,594 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 20:18:44,594 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 20:18:44,594 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 20:18:44,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:18:44,595 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 20:18:44,595 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 20:18:44,595 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 20:18:44,595 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 20:18:44,595 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 20:18:44,596 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 20:18:44,596 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 20:18:44,596 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 20:18:44,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:18:44,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:18:44,597 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 20:18:44,597 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 20:18:44,815 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:18:44,818 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:18:45,879 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:18:46,520 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:18:46,520 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:18:46,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:18:46 BoogieIcfgContainer [2021-11-25 20:18:46,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:18:46,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:18:46,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:18:46,530 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:18:46,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:18:43" (1/3) ... [2021-11-25 20:18:46,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b3a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:18:46, skipping insertion in model container [2021-11-25 20:18:46,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:18:44" (2/3) ... [2021-11-25 20:18:46,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b3a35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:18:46, skipping insertion in model container [2021-11-25 20:18:46,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:18:46" (3/3) ... [2021-11-25 20:18:46,536 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec1_product29.cil.c [2021-11-25 20:18:46,544 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:18:46,544 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:18:46,607 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:18:46,615 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:18:46,616 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:18:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-25 20:18:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 20:18:46,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:46,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:46,696 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:46,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1730455560, now seen corresponding path program 1 times [2021-11-25 20:18:46,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:46,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695329879] [2021-11-25 20:18:46,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:46,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:18:47,403 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:47,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695329879] [2021-11-25 20:18:47,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695329879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:47,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:47,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:18:47,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798600809] [2021-11-25 20:18:47,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:47,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:18:47,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:47,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:18:47,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:18:47,443 INFO L87 Difference]: Start difference. First operand has 381 states, 256 states have (on average 1.58984375) internal successors, (407), 277 states have internal predecessors, (407), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 92 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-25 20:18:48,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:48,026 INFO L93 Difference]: Finished difference Result 851 states and 1377 transitions. [2021-11-25 20:18:48,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:18:48,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 76 [2021-11-25 20:18:48,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:48,064 INFO L225 Difference]: With dead ends: 851 [2021-11-25 20:18:48,064 INFO L226 Difference]: Without dead ends: 490 [2021-11-25 20:18:48,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:18:48,079 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 282 mSDsluCounter, 1805 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 2351 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:48,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 2351 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:18:48,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-25 20:18:48,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 380. [2021-11-25 20:18:48,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 257 states have (on average 1.5719844357976653) internal successors, (404), 276 states have internal predecessors, (404), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 91 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-25 20:18:48,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 595 transitions. [2021-11-25 20:18:48,167 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 595 transitions. Word has length 76 [2021-11-25 20:18:48,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:48,168 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 595 transitions. [2021-11-25 20:18:48,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-25 20:18:48,168 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 595 transitions. [2021-11-25 20:18:48,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-25 20:18:48,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:48,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:48,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:18:48,175 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1940037977, now seen corresponding path program 1 times [2021-11-25 20:18:48,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:48,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200267699] [2021-11-25 20:18:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:48,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:48,395 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:48,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200267699] [2021-11-25 20:18:48,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200267699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:48,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:48,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:18:48,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254546944] [2021-11-25 20:18:48,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:48,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:18:48,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:48,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:18:48,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:18:48,399 INFO L87 Difference]: Start difference. First operand 380 states and 595 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-25 20:18:51,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:51,316 INFO L93 Difference]: Finished difference Result 1287 states and 2054 transitions. [2021-11-25 20:18:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 20:18:51,317 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 79 [2021-11-25 20:18:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:51,327 INFO L225 Difference]: With dead ends: 1287 [2021-11-25 20:18:51,327 INFO L226 Difference]: Without dead ends: 930 [2021-11-25 20:18:51,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:18:51,331 INFO L933 BasicCegarLoop]: 781 mSDtfsCounter, 1736 mSDsluCounter, 2453 mSDsCounter, 0 mSdLazyCounter, 3404 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1801 SdHoareTripleChecker+Valid, 3101 SdHoareTripleChecker+Invalid, 4003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 3404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:51,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1801 Valid, 3101 Invalid, 4003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 3404 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-25 20:18:51,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-11-25 20:18:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 874. [2021-11-25 20:18:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 614 states have (on average 1.5944625407166124) internal successors, (979), 645 states have internal predecessors, (979), 206 states have call successors, (206), 49 states have call predecessors, (206), 53 states have return successors, (213), 204 states have call predecessors, (213), 201 states have call successors, (213) [2021-11-25 20:18:51,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1398 transitions. [2021-11-25 20:18:51,423 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1398 transitions. Word has length 79 [2021-11-25 20:18:51,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:51,424 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 1398 transitions. [2021-11-25 20:18:51,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 6 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2021-11-25 20:18:51,424 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1398 transitions. [2021-11-25 20:18:51,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 20:18:51,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:51,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:51,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:18:51,430 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:51,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:51,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1999918314, now seen corresponding path program 1 times [2021-11-25 20:18:51,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:51,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193204162] [2021-11-25 20:18:51,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:51,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:51,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:51,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:51,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193204162] [2021-11-25 20:18:51,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193204162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:51,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:51,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:18:51,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120672013] [2021-11-25 20:18:51,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:51,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:18:51,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:18:51,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:18:51,585 INFO L87 Difference]: Start difference. First operand 874 states and 1398 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-25 20:18:51,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:51,820 INFO L93 Difference]: Finished difference Result 1477 states and 2374 transitions. [2021-11-25 20:18:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:18:51,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 83 [2021-11-25 20:18:51,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:51,833 INFO L225 Difference]: With dead ends: 1477 [2021-11-25 20:18:51,833 INFO L226 Difference]: Without dead ends: 963 [2021-11-25 20:18:51,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:18:51,845 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 42 mSDsluCounter, 3117 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3538 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:51,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3538 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:18:51,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-25 20:18:51,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 895. [2021-11-25 20:18:51,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 629 states have (on average 1.5802861685214626) internal successors, (994), 660 states have internal predecessors, (994), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 210 states have call predecessors, (228), 201 states have call successors, (228) [2021-11-25 20:18:51,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1428 transitions. [2021-11-25 20:18:51,969 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1428 transitions. Word has length 83 [2021-11-25 20:18:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:51,970 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 1428 transitions. [2021-11-25 20:18:51,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 5 states have internal predecessors, (49), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-25 20:18:51,971 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1428 transitions. [2021-11-25 20:18:51,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-25 20:18:51,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:51,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:51,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:18:51,976 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:51,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:51,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2066337395, now seen corresponding path program 1 times [2021-11-25 20:18:51,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:51,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328073741] [2021-11-25 20:18:51,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:51,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:52,203 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:52,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328073741] [2021-11-25 20:18:52,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328073741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:52,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:52,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:18:52,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715009103] [2021-11-25 20:18:52,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:52,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:18:52,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:52,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:18:52,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:18:52,207 INFO L87 Difference]: Start difference. First operand 895 states and 1428 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-25 20:18:52,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:52,433 INFO L93 Difference]: Finished difference Result 1506 states and 2412 transitions. [2021-11-25 20:18:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:18:52,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 84 [2021-11-25 20:18:52,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:52,446 INFO L225 Difference]: With dead ends: 1506 [2021-11-25 20:18:52,447 INFO L226 Difference]: Without dead ends: 978 [2021-11-25 20:18:52,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:18:52,458 INFO L933 BasicCegarLoop]: 607 mSDtfsCounter, 41 mSDsluCounter, 3136 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3562 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:52,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 3562 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:18:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2021-11-25 20:18:52,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 898. [2021-11-25 20:18:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 632 states have (on average 1.5775316455696202) internal successors, (997), 660 states have internal predecessors, (997), 206 states have call successors, (206), 49 states have call predecessors, (206), 59 states have return successors, (228), 213 states have call predecessors, (228), 201 states have call successors, (228) [2021-11-25 20:18:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1431 transitions. [2021-11-25 20:18:52,537 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1431 transitions. Word has length 84 [2021-11-25 20:18:52,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:52,538 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1431 transitions. [2021-11-25 20:18:52,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-25 20:18:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1431 transitions. [2021-11-25 20:18:52,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-25 20:18:52,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:52,542 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:52,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:18:52,543 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:52,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:52,545 INFO L85 PathProgramCache]: Analyzing trace with hash -56688493, now seen corresponding path program 1 times [2021-11-25 20:18:52,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:52,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695940191] [2021-11-25 20:18:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:52,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:52,894 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:52,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695940191] [2021-11-25 20:18:52,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695940191] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:52,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:52,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:18:52,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676184893] [2021-11-25 20:18:52,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:52,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:18:52,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:52,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:18:52,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:18:52,896 INFO L87 Difference]: Start difference. First operand 898 states and 1431 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-25 20:18:56,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:56,841 INFO L93 Difference]: Finished difference Result 3877 states and 6311 transitions. [2021-11-25 20:18:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:18:56,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 84 [2021-11-25 20:18:56,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:56,868 INFO L225 Difference]: With dead ends: 3877 [2021-11-25 20:18:56,868 INFO L226 Difference]: Without dead ends: 3003 [2021-11-25 20:18:56,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:18:56,876 INFO L933 BasicCegarLoop]: 989 mSDtfsCounter, 2198 mSDsluCounter, 1547 mSDsCounter, 0 mSdLazyCounter, 2991 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2305 SdHoareTripleChecker+Valid, 2475 SdHoareTripleChecker+Invalid, 3965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 2991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:56,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2305 Valid, 2475 Invalid, 3965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 2991 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-25 20:18:56,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2021-11-25 20:18:57,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2731. [2021-11-25 20:18:57,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2731 states, 1919 states have (on average 1.5742574257425743) internal successors, (3021), 2023 states have internal predecessors, (3021), 648 states have call successors, (648), 129 states have call predecessors, (648), 163 states have return successors, (738), 649 states have call predecessors, (738), 643 states have call successors, (738) [2021-11-25 20:18:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2731 states to 2731 states and 4407 transitions. [2021-11-25 20:18:57,110 INFO L78 Accepts]: Start accepts. Automaton has 2731 states and 4407 transitions. Word has length 84 [2021-11-25 20:18:57,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:18:57,110 INFO L470 AbstractCegarLoop]: Abstraction has 2731 states and 4407 transitions. [2021-11-25 20:18:57,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 6 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-25 20:18:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2731 states and 4407 transitions. [2021-11-25 20:18:57,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-25 20:18:57,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:18:57,119 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:18:57,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:18:57,119 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:18:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:18:57,120 INFO L85 PathProgramCache]: Analyzing trace with hash -866911837, now seen corresponding path program 1 times [2021-11-25 20:18:57,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:18:57,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258229831] [2021-11-25 20:18:57,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:18:57,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:18:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:18:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:18:57,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:18:57,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258229831] [2021-11-25 20:18:57,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258229831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:18:57,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:18:57,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:18:57,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742458322] [2021-11-25 20:18:57,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:18:57,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:18:57,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:18:57,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:18:57,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:18:57,296 INFO L87 Difference]: Start difference. First operand 2731 states and 4407 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-25 20:18:59,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:18:59,647 INFO L93 Difference]: Finished difference Result 6167 states and 10005 transitions. [2021-11-25 20:18:59,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:18:59,648 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 90 [2021-11-25 20:18:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:18:59,678 INFO L225 Difference]: With dead ends: 6167 [2021-11-25 20:18:59,678 INFO L226 Difference]: Without dead ends: 4156 [2021-11-25 20:18:59,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:18:59,693 INFO L933 BasicCegarLoop]: 860 mSDtfsCounter, 2908 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 1355 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3073 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 3248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1355 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:18:59,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3073 Valid, 1539 Invalid, 3248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1355 Valid, 1893 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 20:18:59,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2021-11-25 20:19:00,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 3980. [2021-11-25 20:19:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3980 states, 2748 states have (on average 1.5334788937409025) internal successors, (4214), 2911 states have internal predecessors, (4214), 973 states have call successors, (973), 211 states have call predecessors, (973), 258 states have return successors, (1132), 963 states have call predecessors, (1132), 968 states have call successors, (1132) [2021-11-25 20:19:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3980 states to 3980 states and 6319 transitions. [2021-11-25 20:19:00,043 INFO L78 Accepts]: Start accepts. Automaton has 3980 states and 6319 transitions. Word has length 90 [2021-11-25 20:19:00,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:00,044 INFO L470 AbstractCegarLoop]: Abstraction has 3980 states and 6319 transitions. [2021-11-25 20:19:00,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 8 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-25 20:19:00,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3980 states and 6319 transitions. [2021-11-25 20:19:00,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-25 20:19:00,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:00,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:00,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:19:00,047 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:00,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1332034478, now seen corresponding path program 1 times [2021-11-25 20:19:00,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:00,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188743009] [2021-11-25 20:19:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:00,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 20:19:00,224 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:00,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188743009] [2021-11-25 20:19:00,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188743009] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:00,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:00,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:19:00,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134403851] [2021-11-25 20:19:00,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:00,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:19:00,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:00,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:19:00,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:19:00,227 INFO L87 Difference]: Start difference. First operand 3980 states and 6319 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 20:19:02,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:02,086 INFO L93 Difference]: Finished difference Result 7521 states and 11996 transitions. [2021-11-25 20:19:02,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:19:02,087 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) Word has length 92 [2021-11-25 20:19:02,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:02,121 INFO L225 Difference]: With dead ends: 7521 [2021-11-25 20:19:02,121 INFO L226 Difference]: Without dead ends: 4486 [2021-11-25 20:19:02,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:19:02,140 INFO L933 BasicCegarLoop]: 616 mSDtfsCounter, 981 mSDsluCounter, 1358 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 2638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:02,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 1895 Invalid, 2638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-25 20:19:02,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-11-25 20:19:02,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 4061. [2021-11-25 20:19:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4061 states, 2802 states have (on average 1.5274803711634546) internal successors, (4280), 2977 states have internal predecessors, (4280), 976 states have call successors, (976), 226 states have call predecessors, (976), 282 states have return successors, (1166), 963 states have call predecessors, (1166), 971 states have call successors, (1166) [2021-11-25 20:19:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4061 states to 4061 states and 6422 transitions. [2021-11-25 20:19:02,556 INFO L78 Accepts]: Start accepts. Automaton has 4061 states and 6422 transitions. Word has length 92 [2021-11-25 20:19:02,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:02,557 INFO L470 AbstractCegarLoop]: Abstraction has 4061 states and 6422 transitions. [2021-11-25 20:19:02,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 5 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 5 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 20:19:02,557 INFO L276 IsEmpty]: Start isEmpty. Operand 4061 states and 6422 transitions. [2021-11-25 20:19:02,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-25 20:19:02,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:02,560 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:02,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:19:02,561 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:02,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:02,562 INFO L85 PathProgramCache]: Analyzing trace with hash 47364347, now seen corresponding path program 1 times [2021-11-25 20:19:02,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:02,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103922732] [2021-11-25 20:19:02,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:02,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:19:02,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:02,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103922732] [2021-11-25 20:19:02,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103922732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:02,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:02,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:19:02,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049316456] [2021-11-25 20:19:02,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:02,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:19:02,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:02,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:19:02,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:19:02,717 INFO L87 Difference]: Start difference. First operand 4061 states and 6422 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:19:03,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:03,316 INFO L93 Difference]: Finished difference Result 4165 states and 6584 transitions. [2021-11-25 20:19:03,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:19:03,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2021-11-25 20:19:03,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:03,349 INFO L225 Difference]: With dead ends: 4165 [2021-11-25 20:19:03,349 INFO L226 Difference]: Without dead ends: 4150 [2021-11-25 20:19:03,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:19:03,352 INFO L933 BasicCegarLoop]: 555 mSDtfsCounter, 684 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1493 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:03,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [685 Valid, 1493 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:19:03,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-11-25 20:19:03,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 4067. [2021-11-25 20:19:03,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4067 states, 2808 states have (on average 1.5263532763532763) internal successors, (4286), 2983 states have internal predecessors, (4286), 976 states have call successors, (976), 226 states have call predecessors, (976), 282 states have return successors, (1166), 963 states have call predecessors, (1166), 971 states have call successors, (1166) [2021-11-25 20:19:03,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4067 states to 4067 states and 6428 transitions. [2021-11-25 20:19:03,678 INFO L78 Accepts]: Start accepts. Automaton has 4067 states and 6428 transitions. Word has length 97 [2021-11-25 20:19:03,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:03,679 INFO L470 AbstractCegarLoop]: Abstraction has 4067 states and 6428 transitions. [2021-11-25 20:19:03,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 states have internal predecessors, (58), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-25 20:19:03,680 INFO L276 IsEmpty]: Start isEmpty. Operand 4067 states and 6428 transitions. [2021-11-25 20:19:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-25 20:19:03,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:03,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:03,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:19:03,685 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:03,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:03,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1289942680, now seen corresponding path program 1 times [2021-11-25 20:19:03,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:03,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100281177] [2021-11-25 20:19:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:03,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:19:03,870 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:03,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100281177] [2021-11-25 20:19:03,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100281177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:03,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:03,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 20:19:03,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826402212] [2021-11-25 20:19:03,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:03,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:19:03,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:03,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:19:03,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:19:03,873 INFO L87 Difference]: Start difference. First operand 4067 states and 6428 transitions. Second operand has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-25 20:19:04,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:04,399 INFO L93 Difference]: Finished difference Result 7620 states and 12200 transitions. [2021-11-25 20:19:04,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:19:04,400 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 101 [2021-11-25 20:19:04,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:04,444 INFO L225 Difference]: With dead ends: 7620 [2021-11-25 20:19:04,444 INFO L226 Difference]: Without dead ends: 4277 [2021-11-25 20:19:04,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:19:04,469 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 360 mSDsluCounter, 3756 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 4060 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:04,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 4060 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:19:04,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4277 states. [2021-11-25 20:19:04,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4277 to 4267. [2021-11-25 20:19:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4267 states, 2994 states have (on average 1.5050100200400802) internal successors, (4506), 3173 states have internal predecessors, (4506), 981 states have call successors, (981), 231 states have call predecessors, (981), 291 states have return successors, (1169), 968 states have call predecessors, (1169), 976 states have call successors, (1169) [2021-11-25 20:19:04,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4267 states to 4267 states and 6656 transitions. [2021-11-25 20:19:04,823 INFO L78 Accepts]: Start accepts. Automaton has 4267 states and 6656 transitions. Word has length 101 [2021-11-25 20:19:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:04,823 INFO L470 AbstractCegarLoop]: Abstraction has 4267 states and 6656 transitions. [2021-11-25 20:19:04,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-25 20:19:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4267 states and 6656 transitions. [2021-11-25 20:19:04,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-25 20:19:04,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:04,827 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:04,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:19:04,828 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:04,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:04,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2022153961, now seen corresponding path program 1 times [2021-11-25 20:19:04,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:04,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986095352] [2021-11-25 20:19:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:04,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:19:05,032 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:05,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986095352] [2021-11-25 20:19:05,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986095352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:05,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:05,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:19:05,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632783320] [2021-11-25 20:19:05,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:05,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:19:05,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:05,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:19:05,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:19:05,034 INFO L87 Difference]: Start difference. First operand 4267 states and 6656 transitions. Second operand has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-25 20:19:08,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:08,060 INFO L93 Difference]: Finished difference Result 15216 states and 24034 transitions. [2021-11-25 20:19:08,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:19:08,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 109 [2021-11-25 20:19:08,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:08,125 INFO L225 Difference]: With dead ends: 15216 [2021-11-25 20:19:08,125 INFO L226 Difference]: Without dead ends: 10972 [2021-11-25 20:19:08,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:19:08,149 INFO L933 BasicCegarLoop]: 972 mSDtfsCounter, 2147 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 2539 mSolverCounterSat, 909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2211 SdHoareTripleChecker+Valid, 2152 SdHoareTripleChecker+Invalid, 3448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 909 IncrementalHoareTripleChecker+Valid, 2539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:08,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2211 Valid, 2152 Invalid, 3448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [909 Valid, 2539 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 20:19:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10972 states. [2021-11-25 20:19:09,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10972 to 9698. [2021-11-25 20:19:09,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9698 states, 6831 states have (on average 1.515590689503733) internal successors, (10353), 7235 states have internal predecessors, (10353), 2236 states have call successors, (2236), 497 states have call predecessors, (2236), 630 states have return successors, (2653), 2117 states have call predecessors, (2653), 2231 states have call successors, (2653) [2021-11-25 20:19:09,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9698 states to 9698 states and 15242 transitions. [2021-11-25 20:19:09,073 INFO L78 Accepts]: Start accepts. Automaton has 9698 states and 15242 transitions. Word has length 109 [2021-11-25 20:19:09,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:09,074 INFO L470 AbstractCegarLoop]: Abstraction has 9698 states and 15242 transitions. [2021-11-25 20:19:09,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.125) internal successors, (65), 7 states have internal predecessors, (65), 6 states have call successors, (20), 4 states have call predecessors, (20), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-11-25 20:19:09,074 INFO L276 IsEmpty]: Start isEmpty. Operand 9698 states and 15242 transitions. [2021-11-25 20:19:09,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-25 20:19:09,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:09,086 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:09,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:19:09,086 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:09,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:09,087 INFO L85 PathProgramCache]: Analyzing trace with hash -834580586, now seen corresponding path program 1 times [2021-11-25 20:19:09,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:09,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006757543] [2021-11-25 20:19:09,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:09,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:19:09,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:09,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006757543] [2021-11-25 20:19:09,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006757543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:19:09,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019006802] [2021-11-25 20:19:09,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:09,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:09,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:19:09,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:19:09,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:19:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:09,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 1878 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 20:19:09,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:19:12,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:19:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:19:15,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019006802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:19:15,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1216669371] [2021-11-25 20:19:15,274 INFO L159 IcfgInterpreter]: Started Sifa with 101 locations of interest [2021-11-25 20:19:15,274 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:19:15,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:19:15,286 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:19:15,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:19:22,612 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 584 for LOIs [2021-11-25 20:20:08,425 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2021-11-25 20:20:15,771 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 102 for LOIs [2021-11-25 20:20:16,301 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 75 for LOIs [2021-11-25 20:20:16,322 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 117 for LOIs [2021-11-25 20:20:16,665 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 31 for LOIs [2021-11-25 20:20:16,674 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 105 for LOIs [2021-11-25 20:20:16,690 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 591 for LOIs [2021-11-25 20:20:20,110 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 453 for LOIs [2021-11-25 20:20:20,318 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 101 for LOIs [2021-11-25 20:20:20,663 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 75 for LOIs [2021-11-25 20:20:20,672 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 554 for LOIs [2021-11-25 20:20:23,291 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 829 for LOIs [2021-11-25 20:20:28,666 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 656 for LOIs [2021-11-25 20:20:29,084 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:20:41,844 WARN L227 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 656 DAG size of output: 587 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:20:48,813 WARN L227 SmtUtils]: Spent 5.95s on a formula simplification. DAG size of input: 696 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:20:54,937 WARN L227 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 673 DAG size of output: 611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:21:01,090 WARN L227 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 673 DAG size of output: 611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:21:19,402 WARN L227 SmtUtils]: Spent 16.61s on a formula simplification. DAG size of input: 829 DAG size of output: 681 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:21:26,871 WARN L227 SmtUtils]: Spent 6.19s on a formula simplification that was a NOOP. DAG size: 834 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:23:18,726 WARN L227 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 567 DAG size of output: 521 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:23:18,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1216669371] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:23:18,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:23:18,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [20, 12, 12] total 108 [2021-11-25 20:23:18,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488055824] [2021-11-25 20:23:18,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:23:18,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-25 20:23:18,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:23:18,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-25 20:23:18,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=10813, Unknown=0, NotChecked=0, Total=11556 [2021-11-25 20:23:18,742 INFO L87 Difference]: Start difference. First operand 9698 states and 15242 transitions. Second operand has 73 states, 59 states have (on average 1.11864406779661) internal successors, (66), 47 states have internal predecessors, (66), 20 states have call successors, (20), 14 states have call predecessors, (20), 14 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-25 20:24:31,035 WARN L227 SmtUtils]: Spent 5.09s on a formula simplification. DAG size of input: 667 DAG size of output: 622 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:24:36,536 WARN L227 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 669 DAG size of output: 624 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:26:20,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:26:20,319 INFO L93 Difference]: Finished difference Result 20294 states and 31808 transitions. [2021-11-25 20:26:20,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-25 20:26:20,320 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 59 states have (on average 1.11864406779661) internal successors, (66), 47 states have internal predecessors, (66), 20 states have call successors, (20), 14 states have call predecessors, (20), 14 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 110 [2021-11-25 20:26:20,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:26:20,391 INFO L225 Difference]: With dead ends: 20294 [2021-11-25 20:26:20,392 INFO L226 Difference]: Without dead ends: 10619 [2021-11-25 20:26:20,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 242 SyntacticMatches, 7 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7186 ImplicationChecksByTransitivity, 299.6s TimeCoverageRelationStatistics Valid=1278, Invalid=19314, Unknown=0, NotChecked=0, Total=20592 [2021-11-25 20:26:20,445 INFO L933 BasicCegarLoop]: 615 mSDtfsCounter, 1049 mSDsluCounter, 9557 mSDsCounter, 0 mSdLazyCounter, 20027 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 9913 SdHoareTripleChecker+Invalid, 20284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 20027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:26:20,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1069 Valid, 9913 Invalid, 20284 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [257 Valid, 20027 Invalid, 0 Unknown, 0 Unchecked, 51.4s Time] [2021-11-25 20:26:20,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10619 states. [2021-11-25 20:26:21,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10619 to 10352. [2021-11-25 20:26:21,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10352 states, 7334 states have (on average 1.5043632397054814) internal successors, (11033), 7741 states have internal predecessors, (11033), 2335 states have call successors, (2335), 537 states have call predecessors, (2335), 682 states have return successors, (2780), 2225 states have call predecessors, (2780), 2330 states have call successors, (2780) [2021-11-25 20:26:21,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10352 states to 10352 states and 16148 transitions. [2021-11-25 20:26:21,457 INFO L78 Accepts]: Start accepts. Automaton has 10352 states and 16148 transitions. Word has length 110 [2021-11-25 20:26:21,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:26:21,458 INFO L470 AbstractCegarLoop]: Abstraction has 10352 states and 16148 transitions. [2021-11-25 20:26:21,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 59 states have (on average 1.11864406779661) internal successors, (66), 47 states have internal predecessors, (66), 20 states have call successors, (20), 14 states have call predecessors, (20), 14 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-25 20:26:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 10352 states and 16148 transitions. [2021-11-25 20:26:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-25 20:26:21,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:26:21,463 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:26:21,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:26:21,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 20:26:21,685 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:26:21,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:26:21,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1790105356, now seen corresponding path program 1 times [2021-11-25 20:26:21,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:26:21,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083779192] [2021-11-25 20:26:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:26:21,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:26:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:26:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:26:21,805 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:26:21,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083779192] [2021-11-25 20:26:21,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083779192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:26:21,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:26:21,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:26:21,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112567526] [2021-11-25 20:26:21,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:26:21,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:26:21,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:26:21,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:26:21,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:26:21,808 INFO L87 Difference]: Start difference. First operand 10352 states and 16148 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 20:26:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:26:23,125 INFO L93 Difference]: Finished difference Result 29726 states and 46720 transitions. [2021-11-25 20:26:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:26:23,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 111 [2021-11-25 20:26:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:26:23,240 INFO L225 Difference]: With dead ends: 29726 [2021-11-25 20:26:23,241 INFO L226 Difference]: Without dead ends: 20063 [2021-11-25 20:26:23,282 INFO L932 BasicCegarLoop]: 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 [2021-11-25 20:26:23,283 INFO L933 BasicCegarLoop]: 1052 mSDtfsCounter, 545 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:26:23,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 1586 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:26:23,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20063 states. [2021-11-25 20:26:24,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20063 to 20060. [2021-11-25 20:26:24,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20060 states, 14198 states have (on average 1.5054937315114805) internal successors, (21375), 15005 states have internal predecessors, (21375), 4539 states have call successors, (4539), 1037 states have call predecessors, (4539), 1322 states have return successors, (5488), 4321 states have call predecessors, (5488), 4534 states have call successors, (5488) [2021-11-25 20:26:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20060 states to 20060 states and 31402 transitions. [2021-11-25 20:26:24,774 INFO L78 Accepts]: Start accepts. Automaton has 20060 states and 31402 transitions. Word has length 111 [2021-11-25 20:26:24,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:26:24,775 INFO L470 AbstractCegarLoop]: Abstraction has 20060 states and 31402 transitions. [2021-11-25 20:26:24,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 20:26:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand 20060 states and 31402 transitions. [2021-11-25 20:26:24,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-25 20:26:24,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:26:24,781 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:26:24,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:26:24,781 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:26:24,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:26:24,782 INFO L85 PathProgramCache]: Analyzing trace with hash 336556634, now seen corresponding path program 1 times [2021-11-25 20:26:24,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:26:24,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436945458] [2021-11-25 20:26:24,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:26:24,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:26:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:26:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:26:25,393 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:26:25,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436945458] [2021-11-25 20:26:25,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436945458] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:26:25,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544152450] [2021-11-25 20:26:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:26:25,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:26:25,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:26:25,395 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:26:25,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_50248498-9dfa-497b-8066-44d6932bb9f0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:26:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:26:25,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1881 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 20:26:25,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:26:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:26:27,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:26:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:26:30,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544152450] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:26:30,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [901139576] [2021-11-25 20:26:30,163 INFO L159 IcfgInterpreter]: Started Sifa with 102 locations of interest [2021-11-25 20:26:30,164 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:26:30,165 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:26:30,165 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:26:30,165 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:26:35,433 INFO L197 IcfgInterpreter]: Interpreting procedure cleanup with input of size 584 for LOIs [2021-11-25 20:27:19,343 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 584 for LOIs [2021-11-25 20:27:26,199 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection with input of size 102 for LOIs [2021-11-25 20:27:26,728 INFO L197 IcfgInterpreter]: Interpreting procedure buttonForFloorIsPressed with input of size 75 for LOIs [2021-11-25 20:27:26,747 INFO L197 IcfgInterpreter]: Interpreting procedure stopRequestedInDirection__wrappee__empty with input of size 117 for LOIs [2021-11-25 20:27:27,108 INFO L197 IcfgInterpreter]: Interpreting procedure isFloorCalling with input of size 48 for LOIs [2021-11-25 20:27:27,125 INFO L197 IcfgInterpreter]: Interpreting procedure getCurrentFloorID with input of size 105 for LOIs [2021-11-25 20:27:27,140 INFO L197 IcfgInterpreter]: Interpreting procedure bigMacCall with input of size 591 for LOIs [2021-11-25 20:27:30,510 INFO L197 IcfgInterpreter]: Interpreting procedure isBlocked with input of size 448 for LOIs [2021-11-25 20:27:30,727 INFO L197 IcfgInterpreter]: Interpreting procedure continueInDirection with input of size 101 for LOIs [2021-11-25 20:27:31,013 INFO L197 IcfgInterpreter]: Interpreting procedure isTopFloor with input of size 75 for LOIs [2021-11-25 20:27:31,022 INFO L197 IcfgInterpreter]: Interpreting procedure angelinaCall with input of size 554 for LOIs [2021-11-25 20:27:33,457 INFO L197 IcfgInterpreter]: Interpreting procedure initPersonOnFloor with input of size 829 for LOIs [2021-11-25 20:27:38,335 INFO L197 IcfgInterpreter]: Interpreting procedure getOrigin with input of size 656 for LOIs [2021-11-25 20:27:38,745 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:27:51,615 WARN L227 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 656 DAG size of output: 587 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:27:58,888 WARN L227 SmtUtils]: Spent 6.13s on a formula simplification. DAG size of input: 696 DAG size of output: 600 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:28:05,168 WARN L227 SmtUtils]: Spent 5.92s on a formula simplification. DAG size of input: 673 DAG size of output: 611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:28:11,644 WARN L227 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 673 DAG size of output: 611 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:28:32,852 WARN L227 SmtUtils]: Spent 18.79s on a formula simplification. DAG size of input: 829 DAG size of output: 681 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-25 20:28:41,310 WARN L227 SmtUtils]: Spent 6.68s on a formula simplification that was a NOOP. DAG size: 834 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)