./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec2_product30.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_4555f9b4-fd67-4da1-8c69-74317a69ae33/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4555f9b4-fd67-4da1-8c69-74317a69ae33/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_4555f9b4-fd67-4da1-8c69-74317a69ae33/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4555f9b4-fd67-4da1-8c69-74317a69ae33/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4555f9b4-fd67-4da1-8c69-74317a69ae33/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_4555f9b4-fd67-4da1-8c69-74317a69ae33/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 b3416b3e017f399176a4f7a837e050107ced7390b025fd07360efb8b6075a94d --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:26:34,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:26:34,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:26:34,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:26:34,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:26:34,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:26:34,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:26:34,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:26:34,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:26:34,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:26:34,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:26:34,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:26:34,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:26:34,254 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:26:34,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:26:34,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:26:34,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:26:34,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:26:34,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:26:34,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:26:34,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:26:34,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:26:34,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:26:34,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:26:34,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:26:34,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:26:34,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:26:34,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:26:34,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:26:34,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:26:34,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:26:34,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:26:34,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:26:34,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:26:34,320 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:26:34,320 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:26:34,321 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:26:34,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:26:34,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:26:34,323 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:26:34,324 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:26:34,326 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4555f9b4-fd67-4da1-8c69-74317a69ae33/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:26:34,376 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:26:34,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:26:34,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:26:34,378 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:26:34,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:26:34,379 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:26:34,379 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:26:34,379 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:26:34,380 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:26:34,380 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:26:34,380 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:26:34,380 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:26:34,381 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:26:34,381 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:26:34,381 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:26:34,382 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:26:34,382 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:26:34,382 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:26:34,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:26:34,383 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:26:34,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:26:34,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:26:34,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:26:34,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:26:34,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:26:34,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:26:34,385 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:26:34,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:26:34,386 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:26:34,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:26:34,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:26:34,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:26:34,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:26:34,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:26:34,388 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:26:34,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:26:34,388 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:26:34,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:26:34,389 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:26:34,389 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:26:34,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:26:34,390 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_4555f9b4-fd67-4da1-8c69-74317a69ae33/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4555f9b4-fd67-4da1-8c69-74317a69ae33/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3416b3e017f399176a4f7a837e050107ced7390b025fd07360efb8b6075a94d [2021-11-25 18:26:34,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:26:34,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:26:34,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:26:34,727 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:26:34,728 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:26:34,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4555f9b4-fd67-4da1-8c69-74317a69ae33/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c [2021-11-25 18:26:34,854 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4555f9b4-fd67-4da1-8c69-74317a69ae33/bin/utaipan-eEHZpOm5b7/data/137674012/a59b026e6a7f4014b13619afe2f74cf8/FLAGfc63a33a1 [2021-11-25 18:26:35,548 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:26:35,549 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4555f9b4-fd67-4da1-8c69-74317a69ae33/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c [2021-11-25 18:26:35,592 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4555f9b4-fd67-4da1-8c69-74317a69ae33/bin/utaipan-eEHZpOm5b7/data/137674012/a59b026e6a7f4014b13619afe2f74cf8/FLAGfc63a33a1 [2021-11-25 18:26:35,733 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4555f9b4-fd67-4da1-8c69-74317a69ae33/bin/utaipan-eEHZpOm5b7/data/137674012/a59b026e6a7f4014b13619afe2f74cf8 [2021-11-25 18:26:35,738 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:26:35,741 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:26:35,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:26:35,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:26:35,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:26:35,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:26:35" (1/1) ... [2021-11-25 18:26:35,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d95c078 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:35, skipping insertion in model container [2021-11-25 18:26:35,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:26:35" (1/1) ... [2021-11-25 18:26:35,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:26:35,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:26:36,244 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_4555f9b4-fd67-4da1-8c69-74317a69ae33/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c[10611,10624] [2021-11-25 18:26:36,576 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:26:36,589 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:26:36,623 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_4555f9b4-fd67-4da1-8c69-74317a69ae33/sv-benchmarks/c/product-lines/elevator_spec2_product30.cil.c[10611,10624] [2021-11-25 18:26:36,743 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:26:36,782 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:26:36,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:36 WrapperNode [2021-11-25 18:26:36,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:26:36,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:26:36,785 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:26:36,785 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:26:36,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:36" (1/1) ... [2021-11-25 18:26:36,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:36" (1/1) ... [2021-11-25 18:26:36,924 INFO L137 Inliner]: procedures = 95, calls = 347, calls flagged for inlining = 28, calls inlined = 24, statements flattened = 920 [2021-11-25 18:26:36,925 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:26:36,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:26:36,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:26:36,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:26:36,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:36" (1/1) ... [2021-11-25 18:26:36,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:36" (1/1) ... [2021-11-25 18:26:36,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:36" (1/1) ... [2021-11-25 18:26:36,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:36" (1/1) ... [2021-11-25 18:26:36,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:36" (1/1) ... [2021-11-25 18:26:36,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:36" (1/1) ... [2021-11-25 18:26:36,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:36" (1/1) ... [2021-11-25 18:26:37,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:26:37,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:26:37,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:26:37,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:26:37,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:36" (1/1) ... [2021-11-25 18:26:37,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:26:37,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4555f9b4-fd67-4da1-8c69-74317a69ae33/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:26:37,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4555f9b4-fd67-4da1-8c69-74317a69ae33/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:26:37,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4555f9b4-fd67-4da1-8c69-74317a69ae33/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:26:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:26:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 18:26:37,142 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 18:26:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-25 18:26:37,143 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-25 18:26:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 18:26:37,143 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 18:26:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 18:26:37,144 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 18:26:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 18:26:37,144 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 18:26:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2021-11-25 18:26:37,144 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2021-11-25 18:26:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 18:26:37,145 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 18:26:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 18:26:37,145 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 18:26:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure areDoorsOpen [2021-11-25 18:26:37,145 INFO L138 BoogieDeclarations]: Found implementation of procedure areDoorsOpen [2021-11-25 18:26:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 18:26:37,146 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 18:26:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 18:26:37,146 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 18:26:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 18:26:37,146 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 18:26:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 18:26:37,146 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 18:26:37,146 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 18:26:37,146 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 18:26:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 18:26:37,147 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 18:26:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 18:26:37,147 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 18:26:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 18:26:37,147 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 18:26:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 18:26:37,147 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 18:26:37,147 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 18:26:37,148 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 18:26:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:26:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 18:26:37,148 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 18:26:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 18:26:37,148 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 18:26:37,148 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 18:26:37,149 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 18:26:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 18:26:37,149 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 18:26:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift__wrappee__twothirdsfull [2021-11-25 18:26:37,149 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift__wrappee__twothirdsfull [2021-11-25 18:26:37,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:26:37,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:26:37,150 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 18:26:37,150 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 18:26:37,313 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:26:37,316 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:26:38,637 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:26:39,435 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:26:39,436 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 18:26:39,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:26:39 BoogieIcfgContainer [2021-11-25 18:26:39,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:26:39,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:26:39,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:26:39,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:26:39,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:26:35" (1/3) ... [2021-11-25 18:26:39,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4728babb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:26:39, skipping insertion in model container [2021-11-25 18:26:39,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:26:36" (2/3) ... [2021-11-25 18:26:39,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4728babb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:26:39, skipping insertion in model container [2021-11-25 18:26:39,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:26:39" (3/3) ... [2021-11-25 18:26:39,453 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec2_product30.cil.c [2021-11-25 18:26:39,460 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:26:39,461 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:26:39,551 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:26:39,564 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 18:26:39,564 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:26:39,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 258 states have (on average 1.5930232558139534) internal successors, (411), 281 states have internal predecessors, (411), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-25 18:26:39,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-25 18:26:39,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:39,638 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:39,639 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:39,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:39,646 INFO L85 PathProgramCache]: Analyzing trace with hash 399077073, now seen corresponding path program 1 times [2021-11-25 18:26:39,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:39,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714772264] [2021-11-25 18:26:39,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:39,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:40,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:26:40,173 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:40,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714772264] [2021-11-25 18:26:40,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714772264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:40,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:26:40,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:26:40,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974761605] [2021-11-25 18:26:40,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:40,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:26:40,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:40,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:26:40,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:26:40,221 INFO L87 Difference]: Start difference. First operand has 383 states, 258 states have (on average 1.5930232558139534) internal successors, (411), 281 states have internal predecessors, (411), 98 states have call successors, (98), 25 states have call predecessors, (98), 25 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 18:26:40,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:40,432 INFO L93 Difference]: Finished difference Result 401 states and 634 transitions. [2021-11-25 18:26:40,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:26:40,441 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 43 [2021-11-25 18:26:40,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:40,466 INFO L225 Difference]: With dead ends: 401 [2021-11-25 18:26:40,467 INFO L226 Difference]: Without dead ends: 379 [2021-11-25 18:26:40,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:26:40,477 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:40,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 563 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:26:40,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-25 18:26:40,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2021-11-25 18:26:40,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 256 states have (on average 1.58203125) internal successors, (405), 277 states have internal predecessors, (405), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (93), 90 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-25 18:26:40,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 596 transitions. [2021-11-25 18:26:40,613 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 596 transitions. Word has length 43 [2021-11-25 18:26:40,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:40,615 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 596 transitions. [2021-11-25 18:26:40,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.0) internal successors, (28), 2 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 18:26:40,616 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 596 transitions. [2021-11-25 18:26:40,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-25 18:26:40,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:40,623 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:40,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:26:40,623 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:40,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:40,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1563562737, now seen corresponding path program 1 times [2021-11-25 18:26:40,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:40,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145979117] [2021-11-25 18:26:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:40,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:26:40,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:40,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145979117] [2021-11-25 18:26:40,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145979117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:40,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:26:40,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:26:40,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949504697] [2021-11-25 18:26:40,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:40,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:26:40,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:40,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:26:40,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:26:40,849 INFO L87 Difference]: Start difference. First operand 379 states and 596 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 18:26:43,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:43,291 INFO L93 Difference]: Finished difference Result 1243 states and 1996 transitions. [2021-11-25 18:26:43,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:26:43,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 44 [2021-11-25 18:26:43,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:43,303 INFO L225 Difference]: With dead ends: 1243 [2021-11-25 18:26:43,304 INFO L226 Difference]: Without dead ends: 880 [2021-11-25 18:26:43,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:26:43,312 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 1215 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 1826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:43,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1282 Valid, 1378 Invalid, 1826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-25 18:26:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-11-25 18:26:43,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 793. [2021-11-25 18:26:43,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 558 states have (on average 1.603942652329749) internal successors, (895), 588 states have internal predecessors, (895), 190 states have call successors, (190), 43 states have call predecessors, (190), 44 states have return successors, (192), 174 states have call predecessors, (192), 185 states have call successors, (192) [2021-11-25 18:26:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1277 transitions. [2021-11-25 18:26:43,453 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1277 transitions. Word has length 44 [2021-11-25 18:26:43,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:43,454 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 1277 transitions. [2021-11-25 18:26:43,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 18:26:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1277 transitions. [2021-11-25 18:26:43,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-25 18:26:43,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:43,469 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:43,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:26:43,470 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:43,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:43,471 INFO L85 PathProgramCache]: Analyzing trace with hash 92014309, now seen corresponding path program 1 times [2021-11-25 18:26:43,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:43,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49725773] [2021-11-25 18:26:43,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:43,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:26:43,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:43,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49725773] [2021-11-25 18:26:43,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49725773] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:43,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:26:43,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 18:26:43,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922847046] [2021-11-25 18:26:43,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:43,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 18:26:43,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:43,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 18:26:43,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:26:43,780 INFO L87 Difference]: Start difference. First operand 793 states and 1277 transitions. Second operand has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-25 18:26:50,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:50,434 INFO L93 Difference]: Finished difference Result 3318 states and 5440 transitions. [2021-11-25 18:26:50,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-25 18:26:50,436 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 76 [2021-11-25 18:26:50,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:50,471 INFO L225 Difference]: With dead ends: 3318 [2021-11-25 18:26:50,471 INFO L226 Difference]: Without dead ends: 2541 [2021-11-25 18:26:50,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 18:26:50,495 INFO L933 BasicCegarLoop]: 959 mSDtfsCounter, 2515 mSDsluCounter, 3915 mSDsCounter, 0 mSdLazyCounter, 7489 mSolverCounterSat, 2155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2547 SdHoareTripleChecker+Valid, 4700 SdHoareTripleChecker+Invalid, 9644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2155 IncrementalHoareTripleChecker+Valid, 7489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:50,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2547 Valid, 4700 Invalid, 9644 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2155 Valid, 7489 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-11-25 18:26:50,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-11-25 18:26:50,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 1799. [2021-11-25 18:26:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1799 states, 1233 states have (on average 1.5660989456609895) internal successors, (1931), 1305 states have internal predecessors, (1931), 471 states have call successors, (471), 82 states have call predecessors, (471), 94 states have return successors, (490), 444 states have call predecessors, (490), 466 states have call successors, (490) [2021-11-25 18:26:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1799 states to 1799 states and 2892 transitions. [2021-11-25 18:26:50,804 INFO L78 Accepts]: Start accepts. Automaton has 1799 states and 2892 transitions. Word has length 76 [2021-11-25 18:26:50,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:50,806 INFO L470 AbstractCegarLoop]: Abstraction has 1799 states and 2892 transitions. [2021-11-25 18:26:50,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 6 states have call successors, (13), 3 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-25 18:26:50,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1799 states and 2892 transitions. [2021-11-25 18:26:50,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-25 18:26:50,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:50,811 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:50,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:26:50,813 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:50,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:50,815 INFO L85 PathProgramCache]: Analyzing trace with hash -60652630, now seen corresponding path program 1 times [2021-11-25 18:26:50,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:50,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920624731] [2021-11-25 18:26:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:50,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:26:51,093 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:51,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920624731] [2021-11-25 18:26:51,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920624731] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:51,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:26:51,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-25 18:26:51,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171037740] [2021-11-25 18:26:51,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:51,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:26:51,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:51,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:26:51,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:26:51,097 INFO L87 Difference]: Start difference. First operand 1799 states and 2892 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-25 18:26:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:54,525 INFO L93 Difference]: Finished difference Result 5054 states and 8153 transitions. [2021-11-25 18:26:54,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 18:26:54,526 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 78 [2021-11-25 18:26:54,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:54,563 INFO L225 Difference]: With dead ends: 5054 [2021-11-25 18:26:54,563 INFO L226 Difference]: Without dead ends: 3273 [2021-11-25 18:26:54,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-11-25 18:26:54,587 INFO L933 BasicCegarLoop]: 788 mSDtfsCounter, 1741 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 3423 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1806 SdHoareTripleChecker+Valid, 3171 SdHoareTripleChecker+Invalid, 4022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 3423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:54,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1806 Valid, 3171 Invalid, 4022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 3423 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 18:26:54,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-11-25 18:26:54,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3111. [2021-11-25 18:26:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 2207 states have (on average 1.5894879927503398) internal successors, (3508), 2298 states have internal predecessors, (3508), 729 states have call successors, (729), 144 states have call predecessors, (729), 174 states have return successors, (792), 712 states have call predecessors, (792), 724 states have call successors, (792) [2021-11-25 18:26:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 5029 transitions. [2021-11-25 18:26:54,983 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 5029 transitions. Word has length 78 [2021-11-25 18:26:54,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:54,984 INFO L470 AbstractCegarLoop]: Abstraction has 3111 states and 5029 transitions. [2021-11-25 18:26:54,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 6 states have call successors, (14), 3 states have call predecessors, (14), 4 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-11-25 18:26:54,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 5029 transitions. [2021-11-25 18:26:54,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 18:26:54,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:54,990 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:54,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:26:54,990 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:54,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:54,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2034124166, now seen corresponding path program 1 times [2021-11-25 18:26:54,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:54,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629747413] [2021-11-25 18:26:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:54,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:26:55,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:55,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629747413] [2021-11-25 18:26:55,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629747413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:55,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:26:55,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:26:55,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008142240] [2021-11-25 18:26:55,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:55,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:26:55,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:55,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:26:55,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:26:55,234 INFO L87 Difference]: Start difference. First operand 3111 states and 5029 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 18:26:55,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:55,642 INFO L93 Difference]: Finished difference Result 5558 states and 9001 transitions. [2021-11-25 18:26:55,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:26:55,643 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2021-11-25 18:26:55,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:55,683 INFO L225 Difference]: With dead ends: 5558 [2021-11-25 18:26:55,684 INFO L226 Difference]: Without dead ends: 3223 [2021-11-25 18:26:55,704 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 18:26:55,707 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 6 mSDsluCounter, 2958 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3350 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:55,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3350 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:26:55,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2021-11-25 18:26:56,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3181. [2021-11-25 18:26:56,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3181 states, 2257 states have (on average 1.5764288879042978) internal successors, (3558), 2348 states have internal predecessors, (3558), 729 states have call successors, (729), 144 states have call predecessors, (729), 194 states have return successors, (842), 732 states have call predecessors, (842), 724 states have call successors, (842) [2021-11-25 18:26:56,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3181 states to 3181 states and 5129 transitions. [2021-11-25 18:26:56,048 INFO L78 Accepts]: Start accepts. Automaton has 3181 states and 5129 transitions. Word has length 83 [2021-11-25 18:26:56,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:56,049 INFO L470 AbstractCegarLoop]: Abstraction has 3181 states and 5129 transitions. [2021-11-25 18:26:56,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 18:26:56,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3181 states and 5129 transitions. [2021-11-25 18:26:56,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 18:26:56,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:56,054 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:56,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:26:56,054 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:56,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:56,056 INFO L85 PathProgramCache]: Analyzing trace with hash 565475326, now seen corresponding path program 1 times [2021-11-25 18:26:56,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:56,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873622143] [2021-11-25 18:26:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:56,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:26:56,261 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:56,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873622143] [2021-11-25 18:26:56,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873622143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:56,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:26:56,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:26:56,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601452756] [2021-11-25 18:26:56,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:56,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:26:56,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:56,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:26:56,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:26:56,264 INFO L87 Difference]: Start difference. First operand 3181 states and 5129 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 18:26:56,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:56,648 INFO L93 Difference]: Finished difference Result 5664 states and 9141 transitions. [2021-11-25 18:26:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:26:56,649 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 82 [2021-11-25 18:26:56,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:56,681 INFO L225 Difference]: With dead ends: 5664 [2021-11-25 18:26:56,681 INFO L226 Difference]: Without dead ends: 3273 [2021-11-25 18:26:56,699 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 18:26:56,700 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 7 mSDsluCounter, 2947 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:56,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3336 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:26:56,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-11-25 18:26:56,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 3191. [2021-11-25 18:26:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3191 states, 2267 states have (on average 1.5738861932068813) internal successors, (3568), 2348 states have internal predecessors, (3568), 729 states have call successors, (729), 144 states have call predecessors, (729), 194 states have return successors, (842), 742 states have call predecessors, (842), 724 states have call successors, (842) [2021-11-25 18:26:57,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3191 states to 3191 states and 5139 transitions. [2021-11-25 18:26:57,031 INFO L78 Accepts]: Start accepts. Automaton has 3191 states and 5139 transitions. Word has length 82 [2021-11-25 18:26:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:57,032 INFO L470 AbstractCegarLoop]: Abstraction has 3191 states and 5139 transitions. [2021-11-25 18:26:57,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 18:26:57,033 INFO L276 IsEmpty]: Start isEmpty. Operand 3191 states and 5139 transitions. [2021-11-25 18:26:57,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-25 18:26:57,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:57,041 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:57,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:26:57,042 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:57,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:57,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2142430362, now seen corresponding path program 1 times [2021-11-25 18:26:57,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:57,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33074654] [2021-11-25 18:26:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:57,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:26:57,205 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:57,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33074654] [2021-11-25 18:26:57,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33074654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:57,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:26:57,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:26:57,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672151150] [2021-11-25 18:26:57,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:57,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:26:57,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:57,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:26:57,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:26:57,209 INFO L87 Difference]: Start difference. First operand 3191 states and 5139 transitions. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 18:26:57,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:26:57,586 INFO L93 Difference]: Finished difference Result 5682 states and 9159 transitions. [2021-11-25 18:26:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:26:57,587 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 83 [2021-11-25 18:26:57,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:26:57,620 INFO L225 Difference]: With dead ends: 5682 [2021-11-25 18:26:57,620 INFO L226 Difference]: Without dead ends: 3283 [2021-11-25 18:26:57,639 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 18:26:57,640 INFO L933 BasicCegarLoop]: 562 mSDtfsCounter, 7 mSDsluCounter, 2947 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:26:57,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 3336 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:26:57,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2021-11-25 18:26:57,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 3201. [2021-11-25 18:26:57,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 2277 states have (on average 1.5713658322353974) internal successors, (3578), 2348 states have internal predecessors, (3578), 729 states have call successors, (729), 144 states have call predecessors, (729), 194 states have return successors, (842), 752 states have call predecessors, (842), 724 states have call successors, (842) [2021-11-25 18:26:57,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 5149 transitions. [2021-11-25 18:26:57,967 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 5149 transitions. Word has length 83 [2021-11-25 18:26:57,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:26:57,968 INFO L470 AbstractCegarLoop]: Abstraction has 3201 states and 5149 transitions. [2021-11-25 18:26:57,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 5 states have internal predecessors, (53), 2 states have call successors, (15), 2 states have call predecessors, (15), 4 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-25 18:26:57,969 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 5149 transitions. [2021-11-25 18:26:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-25 18:26:57,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:26:57,974 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:26:57,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:26:57,974 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:26:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:26:57,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1679754866, now seen corresponding path program 1 times [2021-11-25 18:26:57,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:26:57,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439221945] [2021-11-25 18:26:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:26:57,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:26:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:26:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:26:58,145 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:26:58,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439221945] [2021-11-25 18:26:58,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439221945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:26:58,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:26:58,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 18:26:58,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144821882] [2021-11-25 18:26:58,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:26:58,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:26:58,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:26:58,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:26:58,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 18:26:58,149 INFO L87 Difference]: Start difference. First operand 3201 states and 5149 transitions. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-25 18:27:01,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:01,001 INFO L93 Difference]: Finished difference Result 8001 states and 12951 transitions. [2021-11-25 18:27:01,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:27:01,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) Word has length 87 [2021-11-25 18:27:01,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:01,060 INFO L225 Difference]: With dead ends: 8001 [2021-11-25 18:27:01,060 INFO L226 Difference]: Without dead ends: 5352 [2021-11-25 18:27:01,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:27:01,086 INFO L933 BasicCegarLoop]: 880 mSDtfsCounter, 2067 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1989 mSolverCounterSat, 907 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2233 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 2896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 907 IncrementalHoareTripleChecker+Valid, 1989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:01,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2233 Valid, 1703 Invalid, 2896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [907 Valid, 1989 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-25 18:27:01,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5352 states. [2021-11-25 18:27:01,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5352 to 5213. [2021-11-25 18:27:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5213 states, 3632 states have (on average 1.5327643171806167) internal successors, (5567), 3773 states have internal predecessors, (5567), 1243 states have call successors, (1243), 257 states have call predecessors, (1243), 337 states have return successors, (1463), 1259 states have call predecessors, (1463), 1238 states have call successors, (1463) [2021-11-25 18:27:01,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5213 states to 5213 states and 8273 transitions. [2021-11-25 18:27:01,717 INFO L78 Accepts]: Start accepts. Automaton has 5213 states and 8273 transitions. Word has length 87 [2021-11-25 18:27:01,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:01,718 INFO L470 AbstractCegarLoop]: Abstraction has 5213 states and 8273 transitions. [2021-11-25 18:27:01,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 7 states have call successors, (15), 4 states have call predecessors, (15), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2021-11-25 18:27:01,719 INFO L276 IsEmpty]: Start isEmpty. Operand 5213 states and 8273 transitions. [2021-11-25 18:27:01,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-25 18:27:01,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:01,725 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:27:01,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:27:01,726 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:01,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:01,727 INFO L85 PathProgramCache]: Analyzing trace with hash 477129719, now seen corresponding path program 1 times [2021-11-25 18:27:01,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:01,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179958310] [2021-11-25 18:27:01,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:01,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:27:01,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:01,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179958310] [2021-11-25 18:27:01,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179958310] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:27:01,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:27:01,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 18:27:01,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777565615] [2021-11-25 18:27:01,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:27:01,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 18:27:01,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:01,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 18:27:01,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 18:27:01,895 INFO L87 Difference]: Start difference. First operand 5213 states and 8273 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-25 18:27:05,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:05,566 INFO L93 Difference]: Finished difference Result 17098 states and 27876 transitions. [2021-11-25 18:27:05,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 18:27:05,567 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 90 [2021-11-25 18:27:05,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:05,677 INFO L225 Difference]: With dead ends: 17098 [2021-11-25 18:27:05,677 INFO L226 Difference]: Without dead ends: 11903 [2021-11-25 18:27:05,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-25 18:27:05,730 INFO L933 BasicCegarLoop]: 1026 mSDtfsCounter, 2211 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 982 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2324 SdHoareTripleChecker+Valid, 2236 SdHoareTripleChecker+Invalid, 3432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 982 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:05,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2324 Valid, 2236 Invalid, 3432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [982 Valid, 2450 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 18:27:05,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11903 states. [2021-11-25 18:27:06,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11903 to 11012. [2021-11-25 18:27:06,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11012 states, 7520 states have (on average 1.5246010638297873) internal successors, (11465), 7923 states have internal predecessors, (11465), 2803 states have call successors, (2803), 523 states have call predecessors, (2803), 688 states have return successors, (3465), 2796 states have call predecessors, (3465), 2798 states have call successors, (3465) [2021-11-25 18:27:06,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11012 states to 11012 states and 17733 transitions. [2021-11-25 18:27:06,990 INFO L78 Accepts]: Start accepts. Automaton has 11012 states and 17733 transitions. Word has length 90 [2021-11-25 18:27:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:06,991 INFO L470 AbstractCegarLoop]: Abstraction has 11012 states and 17733 transitions. [2021-11-25 18:27:06,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-25 18:27:06,992 INFO L276 IsEmpty]: Start isEmpty. Operand 11012 states and 17733 transitions. [2021-11-25 18:27:06,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-25 18:27:06,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:06,998 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:27:06,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 18:27:06,999 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:07,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:07,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1323647733, now seen corresponding path program 1 times [2021-11-25 18:27:07,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:07,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258652688] [2021-11-25 18:27:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:07,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:27:07,210 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:07,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258652688] [2021-11-25 18:27:07,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258652688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:27:07,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:27:07,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 18:27:07,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636095915] [2021-11-25 18:27:07,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:27:07,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 18:27:07,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:07,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 18:27:07,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:27:07,214 INFO L87 Difference]: Start difference. First operand 11012 states and 17733 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-25 18:27:10,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:10,064 INFO L93 Difference]: Finished difference Result 21737 states and 35165 transitions. [2021-11-25 18:27:10,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:27:10,065 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 91 [2021-11-25 18:27:10,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:10,154 INFO L225 Difference]: With dead ends: 21737 [2021-11-25 18:27:10,154 INFO L226 Difference]: Without dead ends: 12224 [2021-11-25 18:27:10,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:27:10,202 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 986 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 1951 SdHoareTripleChecker+Invalid, 2653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 2233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:10,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1062 Valid, 1951 Invalid, 2653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 2233 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 18:27:10,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12224 states. [2021-11-25 18:27:11,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12224 to 11246. [2021-11-25 18:27:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11246 states, 7682 states have (on average 1.5208279093985941) internal successors, (11683), 8113 states have internal predecessors, (11683), 2817 states have call successors, (2817), 555 states have call predecessors, (2817), 746 states have return successors, (3553), 2808 states have call predecessors, (3553), 2812 states have call successors, (3553) [2021-11-25 18:27:11,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11246 states to 11246 states and 18053 transitions. [2021-11-25 18:27:11,365 INFO L78 Accepts]: Start accepts. Automaton has 11246 states and 18053 transitions. Word has length 91 [2021-11-25 18:27:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:11,367 INFO L470 AbstractCegarLoop]: Abstraction has 11246 states and 18053 transitions. [2021-11-25 18:27:11,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 5 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-25 18:27:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 11246 states and 18053 transitions. [2021-11-25 18:27:11,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-25 18:27:11,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:11,373 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:27:11,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 18:27:11,374 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:11,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:11,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1302448650, now seen corresponding path program 1 times [2021-11-25 18:27:11,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:11,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903220688] [2021-11-25 18:27:11,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:11,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:11,640 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 18:27:11,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:11,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903220688] [2021-11-25 18:27:11,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903220688] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:27:11,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:27:11,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:27:11,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163455999] [2021-11-25 18:27:11,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:27:11,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:27:11,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:11,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:27:11,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:27:11,644 INFO L87 Difference]: Start difference. First operand 11246 states and 18053 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 18:27:12,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:12,627 INFO L93 Difference]: Finished difference Result 22385 states and 36924 transitions. [2021-11-25 18:27:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:27:12,628 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 96 [2021-11-25 18:27:12,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:12,732 INFO L225 Difference]: With dead ends: 22385 [2021-11-25 18:27:12,732 INFO L226 Difference]: Without dead ends: 12326 [2021-11-25 18:27:12,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:27:12,791 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 216 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:12,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 1513 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:27:12,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12326 states. [2021-11-25 18:27:13,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12326 to 12326. [2021-11-25 18:27:13,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12326 states, 8718 states have (on average 1.5324615737554486) internal successors, (13360), 9193 states have internal predecessors, (13360), 2817 states have call successors, (2817), 555 states have call predecessors, (2817), 790 states have return successors, (3733), 2808 states have call predecessors, (3733), 2812 states have call successors, (3733) [2021-11-25 18:27:14,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12326 states to 12326 states and 19910 transitions. [2021-11-25 18:27:14,045 INFO L78 Accepts]: Start accepts. Automaton has 12326 states and 19910 transitions. Word has length 96 [2021-11-25 18:27:14,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:14,046 INFO L470 AbstractCegarLoop]: Abstraction has 12326 states and 19910 transitions. [2021-11-25 18:27:14,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 18:27:14,047 INFO L276 IsEmpty]: Start isEmpty. Operand 12326 states and 19910 transitions. [2021-11-25 18:27:14,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-25 18:27:14,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:14,053 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:27:14,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 18:27:14,054 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:14,055 INFO L85 PathProgramCache]: Analyzing trace with hash 589539960, now seen corresponding path program 1 times [2021-11-25 18:27:14,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:14,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271898233] [2021-11-25 18:27:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:14,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:14,217 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 18:27:14,218 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:14,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271898233] [2021-11-25 18:27:14,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271898233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:27:14,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:27:14,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:27:14,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901628362] [2021-11-25 18:27:14,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:27:14,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:27:14,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:14,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:27:14,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:27:14,221 INFO L87 Difference]: Start difference. First operand 12326 states and 19910 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:27:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:16,741 INFO L93 Difference]: Finished difference Result 35737 states and 58411 transitions. [2021-11-25 18:27:16,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:27:16,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 96 [2021-11-25 18:27:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:16,899 INFO L225 Difference]: With dead ends: 35737 [2021-11-25 18:27:16,899 INFO L226 Difference]: Without dead ends: 23428 [2021-11-25 18:27:16,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:27:16,963 INFO L933 BasicCegarLoop]: 565 mSDtfsCounter, 1165 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:16,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1236 Valid, 967 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 18:27:16,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23428 states. [2021-11-25 18:27:18,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23428 to 21670. [2021-11-25 18:27:18,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21670 states, 15369 states have (on average 1.5308738369444987) internal successors, (23528), 16287 states have internal predecessors, (23528), 4864 states have call successors, (4864), 969 states have call predecessors, (4864), 1436 states have return successors, (6776), 4735 states have call predecessors, (6776), 4859 states have call successors, (6776) [2021-11-25 18:27:19,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21670 states to 21670 states and 35168 transitions. [2021-11-25 18:27:19,015 INFO L78 Accepts]: Start accepts. Automaton has 21670 states and 35168 transitions. Word has length 96 [2021-11-25 18:27:19,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:19,016 INFO L470 AbstractCegarLoop]: Abstraction has 21670 states and 35168 transitions. [2021-11-25 18:27:19,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:27:19,017 INFO L276 IsEmpty]: Start isEmpty. Operand 21670 states and 35168 transitions. [2021-11-25 18:27:19,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-25 18:27:19,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:19,022 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:27:19,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 18:27:19,022 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:19,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:19,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1095727475, now seen corresponding path program 1 times [2021-11-25 18:27:19,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:19,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013319317] [2021-11-25 18:27:19,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:19,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:19,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:19,178 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 18:27:19,179 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:19,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013319317] [2021-11-25 18:27:19,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013319317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:27:19,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:27:19,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:27:19,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143222283] [2021-11-25 18:27:19,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:27:19,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:27:19,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:19,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:27:19,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:27:19,182 INFO L87 Difference]: Start difference. First operand 21670 states and 35168 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:27:22,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:22,930 INFO L93 Difference]: Finished difference Result 62860 states and 103829 transitions. [2021-11-25 18:27:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:27:22,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 97 [2021-11-25 18:27:22,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:23,457 INFO L225 Difference]: With dead ends: 62860 [2021-11-25 18:27:23,457 INFO L226 Difference]: Without dead ends: 41208 [2021-11-25 18:27:23,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:27:23,570 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 1150 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:23,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1220 Valid, 978 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-25 18:27:23,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41208 states. [2021-11-25 18:27:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41208 to 39026. [2021-11-25 18:27:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39026 states, 27764 states have (on average 1.5291384526725256) internal successors, (42455), 29637 states have internal predecessors, (42455), 8524 states have call successors, (8524), 1797 states have call predecessors, (8524), 2737 states have return successors, (12870), 8144 states have call predecessors, (12870), 8519 states have call successors, (12870) [2021-11-25 18:27:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39026 states to 39026 states and 63849 transitions. [2021-11-25 18:27:26,833 INFO L78 Accepts]: Start accepts. Automaton has 39026 states and 63849 transitions. Word has length 97 [2021-11-25 18:27:26,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:26,836 INFO L470 AbstractCegarLoop]: Abstraction has 39026 states and 63849 transitions. [2021-11-25 18:27:26,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:27:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 39026 states and 63849 transitions. [2021-11-25 18:27:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-25 18:27:26,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:26,845 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, 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 18:27:26,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 18:27:26,846 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:26,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:26,846 INFO L85 PathProgramCache]: Analyzing trace with hash -392324838, now seen corresponding path program 1 times [2021-11-25 18:27:26,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:26,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354664410] [2021-11-25 18:27:26,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:26,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:27,258 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 18:27:27,258 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:27,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354664410] [2021-11-25 18:27:27,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354664410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:27:27,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:27:27,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:27:27,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327709589] [2021-11-25 18:27:27,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:27:27,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:27:27,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:27,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:27:27,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:27:27,262 INFO L87 Difference]: Start difference. First operand 39026 states and 63849 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:27:33,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:33,304 INFO L93 Difference]: Finished difference Result 115184 states and 194117 transitions. [2021-11-25 18:27:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:27:33,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 98 [2021-11-25 18:27:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:33,795 INFO L225 Difference]: With dead ends: 115184 [2021-11-25 18:27:33,795 INFO L226 Difference]: Without dead ends: 76178 [2021-11-25 18:27:34,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:27:34,027 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 1137 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1206 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:34,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1206 Valid, 987 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 18:27:34,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76178 states. [2021-11-25 18:27:39,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76178 to 74133. [2021-11-25 18:27:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74133 states, 52787 states have (on average 1.525015628848012) internal successors, (80501), 56648 states have internal predecessors, (80501), 15904 states have call successors, (15904), 3453 states have call predecessors, (15904), 5441 states have return successors, (26658), 15032 states have call predecessors, (26658), 15899 states have call successors, (26658) [2021-11-25 18:27:40,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74133 states to 74133 states and 123063 transitions. [2021-11-25 18:27:40,297 INFO L78 Accepts]: Start accepts. Automaton has 74133 states and 123063 transitions. Word has length 98 [2021-11-25 18:27:40,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:27:40,298 INFO L470 AbstractCegarLoop]: Abstraction has 74133 states and 123063 transitions. [2021-11-25 18:27:40,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:27:40,298 INFO L276 IsEmpty]: Start isEmpty. Operand 74133 states and 123063 transitions. [2021-11-25 18:27:40,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-25 18:27:40,304 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:27:40,304 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, 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 18:27:40,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 18:27:40,305 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:27:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:27:40,306 INFO L85 PathProgramCache]: Analyzing trace with hash 722697621, now seen corresponding path program 1 times [2021-11-25 18:27:40,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:27:40,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682779419] [2021-11-25 18:27:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:27:40,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:27:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:27:40,952 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 18:27:40,953 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:27:40,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682779419] [2021-11-25 18:27:40,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682779419] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:27:40,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:27:40,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:27:40,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482587168] [2021-11-25 18:27:40,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:27:40,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:27:40,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:27:40,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:27:40,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:27:40,956 INFO L87 Difference]: Start difference. First operand 74133 states and 123063 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 18:27:51,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:27:51,720 INFO L93 Difference]: Finished difference Result 221069 states and 385272 transitions. [2021-11-25 18:27:51,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:27:51,721 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 99 [2021-11-25 18:27:51,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:27:53,160 INFO L225 Difference]: With dead ends: 221069 [2021-11-25 18:27:53,161 INFO L226 Difference]: Without dead ends: 146960 [2021-11-25 18:27:53,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:27:53,505 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 1124 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1192 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:27:53,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1192 Valid, 999 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-25 18:27:53,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146960 states.