./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec3_product27.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_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/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_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/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_f65b3431-4561-49fc-a248-2499a8240efb/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 4f7f32f81229c7756ac3848f16abf37868e5b5283c2f5648c26317015a8240dd --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:19:33,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:19:33,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:19:33,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:19:33,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:19:33,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:19:33,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:19:33,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:19:33,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:19:33,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:19:33,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:19:33,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:19:33,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:19:33,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:19:33,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:19:33,586 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:19:33,588 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:19:33,590 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:19:33,595 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:19:33,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:19:33,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:19:33,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:19:33,609 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:19:33,610 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:19:33,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:19:33,623 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:19:33,623 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:19:33,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:19:33,627 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:19:33,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:19:33,630 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:19:33,631 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:19:33,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:19:33,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:19:33,636 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:19:33,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:19:33,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:19:33,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:19:33,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:19:33,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:19:33,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:19:33,641 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:19:33,685 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:19:33,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:19:33,686 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:19:33,686 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:19:33,694 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:19:33,694 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:19:33,694 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:19:33,695 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:19:33,695 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:19:33,695 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:19:33,696 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:19:33,697 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:19:33,697 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:19:33,697 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:19:33,697 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:19:33,698 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:19:33,698 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:19:33,698 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:19:33,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:19:33,700 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:19:33,700 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:19:33,700 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:19:33,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:19:33,701 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:19:33,701 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:19:33,701 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:19:33,701 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:19:33,702 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:19:33,702 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:19:33,702 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:19:33,702 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:19:33,703 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:19:33,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:19:33,703 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:19:33,704 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:19:33,704 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:19:33,704 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:19:33,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:19:33,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:19:33,705 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:19:33,705 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:19:33,705 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_f65b3431-4561-49fc-a248-2499a8240efb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f7f32f81229c7756ac3848f16abf37868e5b5283c2f5648c26317015a8240dd [2021-11-25 20:19:34,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:19:34,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:19:34,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:19:34,042 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:19:34,043 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:19:34,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c [2021-11-25 20:19:34,120 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/data/a7b75e32f/4cc810fe395e4887b2fbfcb5a309aa44/FLAG69921acee [2021-11-25 20:19:34,877 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:19:34,880 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c [2021-11-25 20:19:34,912 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/data/a7b75e32f/4cc810fe395e4887b2fbfcb5a309aa44/FLAG69921acee [2021-11-25 20:19:35,021 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/data/a7b75e32f/4cc810fe395e4887b2fbfcb5a309aa44 [2021-11-25 20:19:35,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:19:35,025 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:19:35,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:19:35,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:19:35,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:19:35,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:19:35" (1/1) ... [2021-11-25 20:19:35,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dd84dbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:35, skipping insertion in model container [2021-11-25 20:19:35,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:19:35" (1/1) ... [2021-11-25 20:19:35,040 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:19:35,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:19:35,740 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_f65b3431-4561-49fc-a248-2499a8240efb/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c[73003,73016] [2021-11-25 20:19:35,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:19:35,758 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:19:35,951 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_f65b3431-4561-49fc-a248-2499a8240efb/sv-benchmarks/c/product-lines/elevator_spec3_product27.cil.c[73003,73016] [2021-11-25 20:19:35,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:19:35,992 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:19:35,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:35 WrapperNode [2021-11-25 20:19:35,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:19:35,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:19:35,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:19:35,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:19:36,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:35" (1/1) ... [2021-11-25 20:19:36,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:35" (1/1) ... [2021-11-25 20:19:36,126 INFO L137 Inliner]: procedures = 93, calls = 348, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 1135 [2021-11-25 20:19:36,127 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:19:36,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:19:36,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:19:36,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:19:36,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:35" (1/1) ... [2021-11-25 20:19:36,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:35" (1/1) ... [2021-11-25 20:19:36,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:35" (1/1) ... [2021-11-25 20:19:36,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:35" (1/1) ... [2021-11-25 20:19:36,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:35" (1/1) ... [2021-11-25 20:19:36,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:35" (1/1) ... [2021-11-25 20:19:36,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:35" (1/1) ... [2021-11-25 20:19:36,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:19:36,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:19:36,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:19:36,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:19:36,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:35" (1/1) ... [2021-11-25 20:19:36,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:19:36,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:19:36,323 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:19:36,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:19:36,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:19:36,383 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentHeading [2021-11-25 20:19:36,383 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentHeading [2021-11-25 20:19:36,383 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-25 20:19:36,383 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-25 20:19:36,383 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-25 20:19:36,384 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-25 20:19:36,384 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-25 20:19:36,384 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-25 20:19:36,384 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-25 20:19:36,384 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-25 20:19:36,384 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-25 20:19:36,385 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-25 20:19:36,385 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-25 20:19:36,385 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-25 20:19:36,385 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-25 20:19:36,385 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-25 20:19:36,386 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-25 20:19:36,386 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-25 20:19:36,386 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2021-11-25 20:19:36,386 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2021-11-25 20:19:36,386 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-25 20:19:36,387 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-25 20:19:36,387 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-25 20:19:36,387 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-25 20:19:36,387 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-25 20:19:36,387 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-25 20:19:36,387 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-25 20:19:36,388 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-25 20:19:36,388 INFO L130 BoogieDeclarations]: Found specification of procedure initTopDown [2021-11-25 20:19:36,388 INFO L138 BoogieDeclarations]: Found implementation of procedure initTopDown [2021-11-25 20:19:36,388 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-25 20:19:36,388 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-25 20:19:36,389 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-25 20:19:36,389 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__empty [2021-11-25 20:19:36,389 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-25 20:19:36,389 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-25 20:19:36,389 INFO L130 BoogieDeclarations]: Found specification of procedure initFloors [2021-11-25 20:19:36,390 INFO L138 BoogieDeclarations]: Found implementation of procedure initFloors [2021-11-25 20:19:36,390 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-25 20:19:36,390 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-25 20:19:36,390 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-25 20:19:36,390 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-25 20:19:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-25 20:19:36,391 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-25 20:19:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:19:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-25 20:19:36,391 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-25 20:19:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-25 20:19:36,392 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-25 20:19:36,392 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-25 20:19:36,392 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-25 20:19:36,392 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-25 20:19:36,392 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-25 20:19:36,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:19:36,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:19:36,393 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-25 20:19:36,393 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-25 20:19:36,643 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:19:36,646 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:19:37,956 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:19:38,522 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:19:38,522 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:19:38,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:19:38 BoogieIcfgContainer [2021-11-25 20:19:38,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:19:38,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:19:38,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:19:38,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:19:38,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:19:35" (1/3) ... [2021-11-25 20:19:38,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2625644d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:19:38, skipping insertion in model container [2021-11-25 20:19:38,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:19:35" (2/3) ... [2021-11-25 20:19:38,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2625644d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:19:38, skipping insertion in model container [2021-11-25 20:19:38,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:19:38" (3/3) ... [2021-11-25 20:19:38,535 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product27.cil.c [2021-11-25 20:19:38,541 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:19:38,541 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:19:38,595 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:19:38,602 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:19:38,603 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:19:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand has 410 states, 273 states have (on average 1.5677655677655677) internal successors, (428), 291 states have internal predecessors, (428), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2021-11-25 20:19:38,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-25 20:19:38,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:38,655 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:38,656 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:38,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:38,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1379667533, now seen corresponding path program 1 times [2021-11-25 20:19:38,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:38,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857253555] [2021-11-25 20:19:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:38,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-25 20:19:39,290 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:39,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857253555] [2021-11-25 20:19:39,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857253555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:39,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:39,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 20:19:39,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441255828] [2021-11-25 20:19:39,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:39,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:19:39,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:39,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:19:39,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:19:39,382 INFO L87 Difference]: Start difference. First operand has 410 states, 273 states have (on average 1.5677655677655677) internal successors, (428), 291 states have internal predecessors, (428), 108 states have call successors, (108), 27 states have call predecessors, (108), 27 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:19:40,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:40,708 INFO L93 Difference]: Finished difference Result 1445 states and 2360 transitions. [2021-11-25 20:19:40,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:19:40,712 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) Word has length 88 [2021-11-25 20:19:40,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:40,744 INFO L225 Difference]: With dead ends: 1445 [2021-11-25 20:19:40,744 INFO L226 Difference]: Without dead ends: 1037 [2021-11-25 20:19:40,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:19:40,760 INFO L933 BasicCegarLoop]: 947 mSDtfsCounter, 856 mSDsluCounter, 3341 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 4145 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:40,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 4145 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 20:19:40,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-11-25 20:19:40,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 754. [2021-11-25 20:19:40,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 514 states have (on average 1.5603112840466926) internal successors, (802), 544 states have internal predecessors, (802), 193 states have call successors, (193), 49 states have call predecessors, (193), 46 states have return successors, (200), 180 states have call predecessors, (200), 189 states have call successors, (200) [2021-11-25 20:19:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1195 transitions. [2021-11-25 20:19:40,976 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1195 transitions. Word has length 88 [2021-11-25 20:19:40,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:40,978 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1195 transitions. [2021-11-25 20:19:40,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 3 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 4 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-25 20:19:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1195 transitions. [2021-11-25 20:19:40,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-25 20:19:40,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:40,994 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:40,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:19:40,995 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:40,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:41,000 INFO L85 PathProgramCache]: Analyzing trace with hash 139155810, now seen corresponding path program 1 times [2021-11-25 20:19:41,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:41,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282133988] [2021-11-25 20:19:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:41,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:19:41,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:41,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282133988] [2021-11-25 20:19:41,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282133988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:19:41,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137057965] [2021-11-25 20:19:41,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:41,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:41,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:19:41,246 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:19:41,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:19:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:41,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:19:41,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:19:41,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:19:41,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137057965] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:41,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:19:41,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 20:19:41,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962572347] [2021-11-25 20:19:41,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:41,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:19:41,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:41,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:19:41,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:19:41,870 INFO L87 Difference]: Start difference. First operand 754 states and 1195 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 20:19:42,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:42,146 INFO L93 Difference]: Finished difference Result 2138 states and 3454 transitions. [2021-11-25 20:19:42,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:19:42,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 87 [2021-11-25 20:19:42,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:42,167 INFO L225 Difference]: With dead ends: 2138 [2021-11-25 20:19:42,167 INFO L226 Difference]: Without dead ends: 1396 [2021-11-25 20:19:42,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:19:42,176 INFO L933 BasicCegarLoop]: 1036 mSDtfsCounter, 567 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1542 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:42,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 1542 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:19:42,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-11-25 20:19:42,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1363. [2021-11-25 20:19:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 936 states have (on average 1.5694444444444444) internal successors, (1469), 995 states have internal predecessors, (1469), 339 states have call successors, (339), 88 states have call predecessors, (339), 87 states have return successors, (366), 319 states have call predecessors, (366), 335 states have call successors, (366) [2021-11-25 20:19:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 2174 transitions. [2021-11-25 20:19:42,308 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 2174 transitions. Word has length 87 [2021-11-25 20:19:42,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:42,311 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 2174 transitions. [2021-11-25 20:19:42,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 20:19:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 2174 transitions. [2021-11-25 20:19:42,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-25 20:19:42,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:42,318 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:42,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:19:42,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:42,532 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:42,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:42,533 INFO L85 PathProgramCache]: Analyzing trace with hash 541517762, now seen corresponding path program 1 times [2021-11-25 20:19:42,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:42,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266970013] [2021-11-25 20:19:42,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:42,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:42,739 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:19:42,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:42,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266970013] [2021-11-25 20:19:42,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266970013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:19:42,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155217252] [2021-11-25 20:19:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:42,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:42,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:19:42,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:19:42,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:19:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:43,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:19:43,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:19:43,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:19:43,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155217252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:43,284 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:19:43,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 20:19:43,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485881818] [2021-11-25 20:19:43,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:43,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:19:43,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:43,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:19:43,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:19:43,287 INFO L87 Difference]: Start difference. First operand 1363 states and 2174 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 20:19:43,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:43,531 INFO L93 Difference]: Finished difference Result 2959 states and 4804 transitions. [2021-11-25 20:19:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:19:43,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2021-11-25 20:19:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:43,546 INFO L225 Difference]: With dead ends: 2959 [2021-11-25 20:19:43,547 INFO L226 Difference]: Without dead ends: 1608 [2021-11-25 20:19:43,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:19:43,568 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 104 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:43,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 1417 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:19:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-11-25 20:19:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1391. [2021-11-25 20:19:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1391 states, 960 states have (on average 1.559375) internal successors, (1497), 1019 states have internal predecessors, (1497), 343 states have call successors, (343), 88 states have call predecessors, (343), 87 states have return successors, (370), 323 states have call predecessors, (370), 339 states have call successors, (370) [2021-11-25 20:19:43,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2210 transitions. [2021-11-25 20:19:43,712 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2210 transitions. Word has length 89 [2021-11-25 20:19:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:43,712 INFO L470 AbstractCegarLoop]: Abstraction has 1391 states and 2210 transitions. [2021-11-25 20:19:43,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-25 20:19:43,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2210 transitions. [2021-11-25 20:19:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-25 20:19:43,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:43,720 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:43,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:19:43,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:43,938 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:43,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:43,939 INFO L85 PathProgramCache]: Analyzing trace with hash -613885585, now seen corresponding path program 1 times [2021-11-25 20:19:43,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:43,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198471527] [2021-11-25 20:19:43,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:43,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:44,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:19:44,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:44,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198471527] [2021-11-25 20:19:44,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198471527] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:19:44,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85225574] [2021-11-25 20:19:44,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:44,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:44,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:19:44,134 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:19:44,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:19:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:44,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:19:44,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:19:44,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:19:44,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85225574] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:44,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:19:44,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-25 20:19:44,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541363418] [2021-11-25 20:19:44,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:44,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:19:44,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:44,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:19:44,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:19:44,734 INFO L87 Difference]: Start difference. First operand 1391 states and 2210 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 20:19:45,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:45,145 INFO L93 Difference]: Finished difference Result 3412 states and 5496 transitions. [2021-11-25 20:19:45,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:19:45,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 88 [2021-11-25 20:19:45,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:45,174 INFO L225 Difference]: With dead ends: 3412 [2021-11-25 20:19:45,174 INFO L226 Difference]: Without dead ends: 2033 [2021-11-25 20:19:45,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:19:45,191 INFO L933 BasicCegarLoop]: 1072 mSDtfsCounter, 567 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:45,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 1578 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:19:45,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2021-11-25 20:19:45,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1988. [2021-11-25 20:19:45,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1376 states have (on average 1.565406976744186) internal successors, (2154), 1464 states have internal predecessors, (2154), 486 states have call successors, (486), 124 states have call predecessors, (486), 125 states have return successors, (533), 459 states have call predecessors, (533), 482 states have call successors, (533) [2021-11-25 20:19:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 3173 transitions. [2021-11-25 20:19:45,376 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 3173 transitions. Word has length 88 [2021-11-25 20:19:45,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:45,377 INFO L470 AbstractCegarLoop]: Abstraction has 1988 states and 3173 transitions. [2021-11-25 20:19:45,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-25 20:19:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 3173 transitions. [2021-11-25 20:19:45,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-25 20:19:45,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:45,384 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:45,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:19:45,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:45,598 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:45,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:45,599 INFO L85 PathProgramCache]: Analyzing trace with hash -325176584, now seen corresponding path program 1 times [2021-11-25 20:19:45,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:45,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978081435] [2021-11-25 20:19:45,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:45,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 20:19:45,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:45,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978081435] [2021-11-25 20:19:45,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978081435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:19:45,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337831720] [2021-11-25 20:19:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:45,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:45,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:19:45,781 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:19:45,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:19:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:46,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:19:46,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:19:46,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:19:46,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337831720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:46,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:19:46,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-25 20:19:46,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526739369] [2021-11-25 20:19:46,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:46,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:19:46,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:46,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:19:46,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:19:46,571 INFO L87 Difference]: Start difference. First operand 1988 states and 3173 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 20:19:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:47,934 INFO L93 Difference]: Finished difference Result 5754 states and 9398 transitions. [2021-11-25 20:19:47,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:19:47,935 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2021-11-25 20:19:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:47,988 INFO L225 Difference]: With dead ends: 5754 [2021-11-25 20:19:47,989 INFO L226 Difference]: Without dead ends: 3778 [2021-11-25 20:19:48,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:19:48,059 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 636 mSDsluCounter, 2722 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 3286 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:48,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 3286 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 20:19:48,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3778 states. [2021-11-25 20:19:48,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3778 to 3750. [2021-11-25 20:19:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3750 states, 2509 states have (on average 1.5005978477481068) internal successors, (3765), 2730 states have internal predecessors, (3765), 1021 states have call successors, (1021), 220 states have call predecessors, (1021), 219 states have return successors, (1170), 935 states have call predecessors, (1170), 1015 states have call successors, (1170) [2021-11-25 20:19:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3750 states to 3750 states and 5956 transitions. [2021-11-25 20:19:48,399 INFO L78 Accepts]: Start accepts. Automaton has 3750 states and 5956 transitions. Word has length 89 [2021-11-25 20:19:48,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:48,400 INFO L470 AbstractCegarLoop]: Abstraction has 3750 states and 5956 transitions. [2021-11-25 20:19:48,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (18), 3 states have call predecessors, (18), 4 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-25 20:19:48,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3750 states and 5956 transitions. [2021-11-25 20:19:48,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-25 20:19:48,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:48,404 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:48,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:19:48,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:48,617 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:48,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:48,618 INFO L85 PathProgramCache]: Analyzing trace with hash 700795467, now seen corresponding path program 1 times [2021-11-25 20:19:48,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:48,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078365428] [2021-11-25 20:19:48,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:48,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:48,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 20:19:48,836 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:48,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078365428] [2021-11-25 20:19:48,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078365428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:48,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:48,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:19:48,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444215777] [2021-11-25 20:19:48,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:48,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:19:48,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:48,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:19:48,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:19:48,840 INFO L87 Difference]: Start difference. First operand 3750 states and 5956 transitions. Second operand has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-25 20:19:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:50,900 INFO L93 Difference]: Finished difference Result 13068 states and 21685 transitions. [2021-11-25 20:19:50,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:19:50,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) Word has length 94 [2021-11-25 20:19:50,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:51,032 INFO L225 Difference]: With dead ends: 13068 [2021-11-25 20:19:51,033 INFO L226 Difference]: Without dead ends: 9330 [2021-11-25 20:19:51,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:19:51,088 INFO L933 BasicCegarLoop]: 981 mSDtfsCounter, 810 mSDsluCounter, 4432 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 5228 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:51,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [881 Valid, 5228 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 20:19:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-11-25 20:19:51,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 7271. [2021-11-25 20:19:51,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7271 states, 4892 states have (on average 1.5008176614881439) internal successors, (7342), 5349 states have internal predecessors, (7342), 1981 states have call successors, (1981), 395 states have call predecessors, (1981), 397 states have return successors, (2451), 1769 states have call predecessors, (2451), 1973 states have call successors, (2451) [2021-11-25 20:19:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7271 states to 7271 states and 11774 transitions. [2021-11-25 20:19:51,918 INFO L78 Accepts]: Start accepts. Automaton has 7271 states and 11774 transitions. Word has length 94 [2021-11-25 20:19:51,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:51,918 INFO L470 AbstractCegarLoop]: Abstraction has 7271 states and 11774 transitions. [2021-11-25 20:19:51,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-25 20:19:51,920 INFO L276 IsEmpty]: Start isEmpty. Operand 7271 states and 11774 transitions. [2021-11-25 20:19:51,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-25 20:19:51,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:51,924 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:51,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:19:51,924 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:51,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:51,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1271941313, now seen corresponding path program 1 times [2021-11-25 20:19:51,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:51,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005752080] [2021-11-25 20:19:51,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:51,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:52,229 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 20:19:52,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:52,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005752080] [2021-11-25 20:19:52,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005752080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:19:52,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977848023] [2021-11-25 20:19:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:52,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:19:52,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:19:52,232 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:19:52,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:19:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:52,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 20:19:52,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:19:53,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:19:53,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:19:53,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977848023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:53,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:19:53,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-11-25 20:19:53,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741432613] [2021-11-25 20:19:53,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:53,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:19:53,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:53,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:19:53,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:19:53,333 INFO L87 Difference]: Start difference. First operand 7271 states and 11774 transitions. Second operand has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-25 20:19:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:56,417 INFO L93 Difference]: Finished difference Result 18160 states and 30162 transitions. [2021-11-25 20:19:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:19:56,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 100 [2021-11-25 20:19:56,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:56,571 INFO L225 Difference]: With dead ends: 18160 [2021-11-25 20:19:56,571 INFO L226 Difference]: Without dead ends: 10901 [2021-11-25 20:19:56,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:19:56,644 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 1365 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 2067 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1423 SdHoareTripleChecker+Valid, 2334 SdHoareTripleChecker+Invalid, 2157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:56,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1423 Valid, 2334 Invalid, 2157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2067 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-25 20:19:56,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10901 states. [2021-11-25 20:19:57,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10901 to 7978. [2021-11-25 20:19:57,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7978 states, 5419 states have (on average 1.4825613581841668) internal successors, (8034), 5894 states have internal predecessors, (8034), 2113 states have call successors, (2113), 451 states have call predecessors, (2113), 445 states have return successors, (2598), 1875 states have call predecessors, (2598), 2105 states have call successors, (2598) [2021-11-25 20:19:57,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7978 states to 7978 states and 12745 transitions. [2021-11-25 20:19:57,702 INFO L78 Accepts]: Start accepts. Automaton has 7978 states and 12745 transitions. Word has length 100 [2021-11-25 20:19:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:19:57,703 INFO L470 AbstractCegarLoop]: Abstraction has 7978 states and 12745 transitions. [2021-11-25 20:19:57,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 3 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-25 20:19:57,704 INFO L276 IsEmpty]: Start isEmpty. Operand 7978 states and 12745 transitions. [2021-11-25 20:19:57,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-25 20:19:57,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:19:57,721 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:19:57,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:19:57,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 20:19:57,923 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:19:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:19:57,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1480542950, now seen corresponding path program 1 times [2021-11-25 20:19:57,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:19:57,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377103882] [2021-11-25 20:19:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:19:57,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:19:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:19:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 20:19:58,090 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:19:58,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377103882] [2021-11-25 20:19:58,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377103882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:19:58,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:19:58,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:19:58,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210694812] [2021-11-25 20:19:58,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:19:58,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:19:58,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:19:58,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:19:58,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:19:58,094 INFO L87 Difference]: Start difference. First operand 7978 states and 12745 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 20:19:59,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:19:59,406 INFO L93 Difference]: Finished difference Result 17007 states and 27766 transitions. [2021-11-25 20:19:59,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:19:59,407 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) Word has length 105 [2021-11-25 20:19:59,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:19:59,513 INFO L225 Difference]: With dead ends: 17007 [2021-11-25 20:19:59,513 INFO L226 Difference]: Without dead ends: 10406 [2021-11-25 20:19:59,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:19:59,593 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 202 mSDsluCounter, 3316 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 3810 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:19:59,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 3810 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:19:59,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10406 states. [2021-11-25 20:20:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10406 to 7567. [2021-11-25 20:20:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7567 states, 5261 states have (on average 1.4693024139897357) internal successors, (7730), 5623 states have internal predecessors, (7730), 1830 states have call successors, (1830), 451 states have call predecessors, (1830), 475 states have return successors, (2398), 1648 states have call predecessors, (2398), 1822 states have call successors, (2398) [2021-11-25 20:20:00,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7567 states to 7567 states and 11958 transitions. [2021-11-25 20:20:00,571 INFO L78 Accepts]: Start accepts. Automaton has 7567 states and 11958 transitions. Word has length 105 [2021-11-25 20:20:00,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:00,573 INFO L470 AbstractCegarLoop]: Abstraction has 7567 states and 11958 transitions. [2021-11-25 20:20:00,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 3 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-25 20:20:00,574 INFO L276 IsEmpty]: Start isEmpty. Operand 7567 states and 11958 transitions. [2021-11-25 20:20:00,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-25 20:20:00,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:00,581 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:00,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:20:00,582 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:00,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:00,583 INFO L85 PathProgramCache]: Analyzing trace with hash -135467064, now seen corresponding path program 1 times [2021-11-25 20:20:00,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:00,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120022704] [2021-11-25 20:20:00,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:00,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-25 20:20:00,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:00,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120022704] [2021-11-25 20:20:00,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120022704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:00,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:00,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 20:20:00,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051544885] [2021-11-25 20:20:00,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:00,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:20:00,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:00,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:20:00,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:20:00,864 INFO L87 Difference]: Start difference. First operand 7567 states and 11958 transitions. Second operand has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-25 20:20:07,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:07,005 INFO L93 Difference]: Finished difference Result 18984 states and 31099 transitions. [2021-11-25 20:20:07,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 20:20:07,006 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) Word has length 109 [2021-11-25 20:20:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:07,124 INFO L225 Difference]: With dead ends: 18984 [2021-11-25 20:20:07,124 INFO L226 Difference]: Without dead ends: 13521 [2021-11-25 20:20:07,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2021-11-25 20:20:07,186 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 2158 mSDsluCounter, 2953 mSDsCounter, 0 mSdLazyCounter, 5550 mSolverCounterSat, 1051 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2263 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 6601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1051 IncrementalHoareTripleChecker+Valid, 5550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:07,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2263 Valid, 3394 Invalid, 6601 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1051 Valid, 5550 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-11-25 20:20:07,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13521 states. [2021-11-25 20:20:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13521 to 12834. [2021-11-25 20:20:08,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12834 states, 9007 states have (on average 1.4764072388142555) internal successors, (13298), 9587 states have internal predecessors, (13298), 2990 states have call successors, (2990), 769 states have call predecessors, (2990), 836 states have return successors, (4267), 2723 states have call predecessors, (4267), 2978 states have call successors, (4267) [2021-11-25 20:20:08,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12834 states to 12834 states and 20555 transitions. [2021-11-25 20:20:08,577 INFO L78 Accepts]: Start accepts. Automaton has 12834 states and 20555 transitions. Word has length 109 [2021-11-25 20:20:08,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:08,578 INFO L470 AbstractCegarLoop]: Abstraction has 12834 states and 20555 transitions. [2021-11-25 20:20:08,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 5 states have call successors, (22), 4 states have call predecessors, (22), 4 states have return successors, (20), 5 states have call predecessors, (20), 4 states have call successors, (20) [2021-11-25 20:20:08,578 INFO L276 IsEmpty]: Start isEmpty. Operand 12834 states and 20555 transitions. [2021-11-25 20:20:08,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-25 20:20:08,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:08,587 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:08,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:20:08,588 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:08,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:08,588 INFO L85 PathProgramCache]: Analyzing trace with hash -328581598, now seen corresponding path program 1 times [2021-11-25 20:20:08,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:08,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408973289] [2021-11-25 20:20:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:08,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-25 20:20:08,759 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:08,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408973289] [2021-11-25 20:20:08,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408973289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:08,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:08,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-25 20:20:08,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893736488] [2021-11-25 20:20:08,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:08,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:20:08,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:08,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:20:08,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:20:08,762 INFO L87 Difference]: Start difference. First operand 12834 states and 20555 transitions. Second operand has 8 states, 6 states have (on average 10.333333333333334) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-25 20:20:10,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:10,344 INFO L93 Difference]: Finished difference Result 18409 states and 29590 transitions. [2021-11-25 20:20:10,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:20:10,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 10.333333333333334) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 136 [2021-11-25 20:20:10,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:10,463 INFO L225 Difference]: With dead ends: 18409 [2021-11-25 20:20:10,464 INFO L226 Difference]: Without dead ends: 12919 [2021-11-25 20:20:10,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:20:10,511 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 464 mSDsluCounter, 4317 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 4821 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:10,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 4821 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:20:10,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12919 states. [2021-11-25 20:20:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12919 to 11956. [2021-11-25 20:20:11,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11956 states, 8477 states have (on average 1.4811843812669576) internal successors, (12556), 8979 states have internal predecessors, (12556), 2642 states have call successors, (2642), 769 states have call predecessors, (2642), 836 states have return successors, (3436), 2453 states have call predecessors, (3436), 2630 states have call successors, (3436) [2021-11-25 20:20:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11956 states to 11956 states and 18634 transitions. [2021-11-25 20:20:12,059 INFO L78 Accepts]: Start accepts. Automaton has 11956 states and 18634 transitions. Word has length 136 [2021-11-25 20:20:12,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:12,060 INFO L470 AbstractCegarLoop]: Abstraction has 11956 states and 18634 transitions. [2021-11-25 20:20:12,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 10.333333333333334) internal successors, (62), 7 states have internal predecessors, (62), 4 states have call successors, (25), 3 states have call predecessors, (25), 4 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-25 20:20:12,061 INFO L276 IsEmpty]: Start isEmpty. Operand 11956 states and 18634 transitions. [2021-11-25 20:20:12,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-25 20:20:12,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:12,069 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:12,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:20:12,070 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:12,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:12,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1438334633, now seen corresponding path program 1 times [2021-11-25 20:20:12,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:12,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131509807] [2021-11-25 20:20:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:12,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-25 20:20:12,357 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:12,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131509807] [2021-11-25 20:20:12,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131509807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:12,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:12,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-25 20:20:12,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500685650] [2021-11-25 20:20:12,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:12,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:20:12,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:12,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:20:12,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:20:12,360 INFO L87 Difference]: Start difference. First operand 11956 states and 18634 transitions. Second operand has 12 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-25 20:20:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:19,648 INFO L93 Difference]: Finished difference Result 24989 states and 40283 transitions. [2021-11-25 20:20:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-25 20:20:19,648 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) Word has length 140 [2021-11-25 20:20:19,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:19,807 INFO L225 Difference]: With dead ends: 24989 [2021-11-25 20:20:19,807 INFO L226 Difference]: Without dead ends: 24970 [2021-11-25 20:20:19,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 20:20:19,824 INFO L933 BasicCegarLoop]: 792 mSDtfsCounter, 2880 mSDsluCounter, 4238 mSDsCounter, 0 mSdLazyCounter, 7546 mSolverCounterSat, 1307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2986 SdHoareTripleChecker+Valid, 4759 SdHoareTripleChecker+Invalid, 8853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1307 IncrementalHoareTripleChecker+Valid, 7546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:19,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2986 Valid, 4759 Invalid, 8853 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1307 Valid, 7546 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-11-25 20:20:19,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24970 states. [2021-11-25 20:20:21,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24970 to 23464. [2021-11-25 20:20:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23464 states, 17323 states have (on average 1.5041274606015125) internal successors, (26056), 18052 states have internal predecessors, (26056), 4477 states have call successors, (4477), 1491 states have call predecessors, (4477), 1663 states have return successors, (6350), 4256 states have call predecessors, (6350), 4461 states have call successors, (6350) [2021-11-25 20:20:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23464 states to 23464 states and 36883 transitions. [2021-11-25 20:20:21,995 INFO L78 Accepts]: Start accepts. Automaton has 23464 states and 36883 transitions. Word has length 140 [2021-11-25 20:20:21,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:21,996 INFO L470 AbstractCegarLoop]: Abstraction has 23464 states and 36883 transitions. [2021-11-25 20:20:21,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 6.4) internal successors, (64), 10 states have internal predecessors, (64), 5 states have call successors, (26), 4 states have call predecessors, (26), 5 states have return successors, (24), 5 states have call predecessors, (24), 4 states have call successors, (24) [2021-11-25 20:20:21,996 INFO L276 IsEmpty]: Start isEmpty. Operand 23464 states and 36883 transitions. [2021-11-25 20:20:22,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-25 20:20:22,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:22,015 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:22,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:20:22,016 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:22,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:22,017 INFO L85 PathProgramCache]: Analyzing trace with hash -549725606, now seen corresponding path program 1 times [2021-11-25 20:20:22,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:22,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699866883] [2021-11-25 20:20:22,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:22,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-25 20:20:22,212 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:22,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699866883] [2021-11-25 20:20:22,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699866883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:20:22,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812083919] [2021-11-25 20:20:22,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:22,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:22,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:22,214 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:20:22,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:20:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:22,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 2009 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:20:22,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:20:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 20:20:23,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:20:23,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812083919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:23,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:20:23,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-11-25 20:20:23,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422066808] [2021-11-25 20:20:23,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:23,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:20:23,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:23,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:20:23,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:20:23,442 INFO L87 Difference]: Start difference. First operand 23464 states and 36883 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (30), 4 states have call predecessors, (30), 5 states have return successors, (28), 6 states have call predecessors, (28), 5 states have call successors, (28) [2021-11-25 20:20:27,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:27,880 INFO L93 Difference]: Finished difference Result 49958 states and 79541 transitions. [2021-11-25 20:20:27,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 20:20:27,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (30), 4 states have call predecessors, (30), 5 states have return successors, (28), 6 states have call predecessors, (28), 5 states have call successors, (28) Word has length 160 [2021-11-25 20:20:27,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:28,087 INFO L225 Difference]: With dead ends: 49958 [2021-11-25 20:20:28,087 INFO L226 Difference]: Without dead ends: 26130 [2021-11-25 20:20:28,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-11-25 20:20:28,357 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 1829 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 3462 mSolverCounterSat, 1180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1867 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 4642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1180 IncrementalHoareTripleChecker+Valid, 3462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:28,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1867 Valid, 1693 Invalid, 4642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1180 Valid, 3462 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-25 20:20:28,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26130 states. [2021-11-25 20:20:29,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26130 to 23449. [2021-11-25 20:20:29,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23449 states, 17308 states have (on average 1.5043910330483015) internal successors, (26038), 18037 states have internal predecessors, (26038), 4477 states have call successors, (4477), 1491 states have call predecessors, (4477), 1663 states have return successors, (6350), 4256 states have call predecessors, (6350), 4461 states have call successors, (6350) [2021-11-25 20:20:30,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23449 states to 23449 states and 36865 transitions. [2021-11-25 20:20:30,175 INFO L78 Accepts]: Start accepts. Automaton has 23449 states and 36865 transitions. Word has length 160 [2021-11-25 20:20:30,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:30,175 INFO L470 AbstractCegarLoop]: Abstraction has 23449 states and 36865 transitions. [2021-11-25 20:20:30,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 5 states have call successors, (30), 4 states have call predecessors, (30), 5 states have return successors, (28), 6 states have call predecessors, (28), 5 states have call successors, (28) [2021-11-25 20:20:30,176 INFO L276 IsEmpty]: Start isEmpty. Operand 23449 states and 36865 transitions. [2021-11-25 20:20:30,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-25 20:20:30,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:30,190 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:30,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:20:30,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:30,417 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:30,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:30,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1047327261, now seen corresponding path program 1 times [2021-11-25 20:20:30,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:30,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158519292] [2021-11-25 20:20:30,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:30,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:30,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:30,541 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-25 20:20:30,541 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:30,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158519292] [2021-11-25 20:20:30,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158519292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:30,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:30,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:20:30,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463990232] [2021-11-25 20:20:30,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:30,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:20:30,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:30,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:20:30,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:20:30,545 INFO L87 Difference]: Start difference. First operand 23449 states and 36865 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-25 20:20:32,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:32,487 INFO L93 Difference]: Finished difference Result 54804 states and 87213 transitions. [2021-11-25 20:20:32,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:20:32,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 173 [2021-11-25 20:20:32,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:32,700 INFO L225 Difference]: With dead ends: 54804 [2021-11-25 20:20:32,700 INFO L226 Difference]: Without dead ends: 31367 [2021-11-25 20:20:32,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:20:32,821 INFO L933 BasicCegarLoop]: 814 mSDtfsCounter, 527 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1394 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:32,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 1394 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:20:32,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31367 states. [2021-11-25 20:20:35,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31367 to 31076. [2021-11-25 20:20:35,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31076 states, 22971 states have (on average 1.5050280788820687) internal successors, (34572), 23950 states have internal predecessors, (34572), 5891 states have call successors, (5891), 1970 states have call predecessors, (5891), 2213 states have return successors, (8425), 5605 states have call predecessors, (8425), 5875 states have call successors, (8425) [2021-11-25 20:20:35,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31076 states to 31076 states and 48888 transitions. [2021-11-25 20:20:35,267 INFO L78 Accepts]: Start accepts. Automaton has 31076 states and 48888 transitions. Word has length 173 [2021-11-25 20:20:35,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:35,268 INFO L470 AbstractCegarLoop]: Abstraction has 31076 states and 48888 transitions. [2021-11-25 20:20:35,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-25 20:20:35,268 INFO L276 IsEmpty]: Start isEmpty. Operand 31076 states and 48888 transitions. [2021-11-25 20:20:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-25 20:20:35,286 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:35,286 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:35,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 20:20:35,287 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:35,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:35,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1431178422, now seen corresponding path program 1 times [2021-11-25 20:20:35,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:35,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493843916] [2021-11-25 20:20:35,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:35,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-25 20:20:35,420 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:35,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493843916] [2021-11-25 20:20:35,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493843916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:20:35,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075165411] [2021-11-25 20:20:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:35,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:35,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:35,425 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:20:35,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:20:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:35,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 2067 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-25 20:20:35,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:20:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 20:20:36,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:20:36,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075165411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:36,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:20:36,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8] total 9 [2021-11-25 20:20:36,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009853579] [2021-11-25 20:20:36,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:36,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:20:36,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:36,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:20:36,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:20:36,303 INFO L87 Difference]: Start difference. First operand 31076 states and 48888 transitions. Second operand has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-25 20:20:40,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:40,223 INFO L93 Difference]: Finished difference Result 80699 states and 128412 transitions. [2021-11-25 20:20:40,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:20:40,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) Word has length 178 [2021-11-25 20:20:40,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:40,667 INFO L225 Difference]: With dead ends: 80699 [2021-11-25 20:20:40,667 INFO L226 Difference]: Without dead ends: 52879 [2021-11-25 20:20:40,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:20:40,784 INFO L933 BasicCegarLoop]: 735 mSDtfsCounter, 707 mSDsluCounter, 4131 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 4640 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:40,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 4640 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-25 20:20:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52879 states. [2021-11-25 20:20:43,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52879 to 51801. [2021-11-25 20:20:43,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51801 states, 38393 states have (on average 1.511108795874248) internal successors, (58016), 39962 states have internal predecessors, (58016), 9777 states have call successors, (9777), 3248 states have call predecessors, (9777), 3630 states have return successors, (14466), 9310 states have call predecessors, (14466), 9749 states have call successors, (14466) [2021-11-25 20:20:44,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51801 states to 51801 states and 82259 transitions. [2021-11-25 20:20:44,508 INFO L78 Accepts]: Start accepts. Automaton has 51801 states and 82259 transitions. Word has length 178 [2021-11-25 20:20:44,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:44,508 INFO L470 AbstractCegarLoop]: Abstraction has 51801 states and 82259 transitions. [2021-11-25 20:20:44,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 3 states have call successors, (34), 3 states have call predecessors, (34), 5 states have return successors, (32), 5 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-25 20:20:44,509 INFO L276 IsEmpty]: Start isEmpty. Operand 51801 states and 82259 transitions. [2021-11-25 20:20:44,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-25 20:20:44,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:44,534 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:44,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:20:44,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 20:20:44,761 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:44,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1614247266, now seen corresponding path program 1 times [2021-11-25 20:20:44,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:44,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802005364] [2021-11-25 20:20:44,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:44,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-25 20:20:44,952 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:44,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802005364] [2021-11-25 20:20:44,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802005364] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:20:44,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397110166] [2021-11-25 20:20:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:44,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:20:44,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:20:44,954 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:20:44,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:20:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:45,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 2068 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 20:20:45,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:20:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-25 20:20:45,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:20:45,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397110166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:45,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:20:45,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 8 [2021-11-25 20:20:45,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067657156] [2021-11-25 20:20:45,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:45,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:20:45,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:45,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:20:45,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 20:20:45,788 INFO L87 Difference]: Start difference. First operand 51801 states and 82259 transitions. Second operand has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-25 20:20:50,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:20:50,549 INFO L93 Difference]: Finished difference Result 106699 states and 169470 transitions. [2021-11-25 20:20:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 20:20:50,550 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) Word has length 180 [2021-11-25 20:20:50,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:20:51,155 INFO L225 Difference]: With dead ends: 106699 [2021-11-25 20:20:51,155 INFO L226 Difference]: Without dead ends: 58269 [2021-11-25 20:20:51,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:20:51,343 INFO L933 BasicCegarLoop]: 1052 mSDtfsCounter, 605 mSDsluCounter, 4786 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 5507 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:20:51,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 5507 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-25 20:20:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58269 states. [2021-11-25 20:20:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58269 to 58161. [2021-11-25 20:20:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58161 states, 43211 states have (on average 1.5100321677350674) internal successors, (65250), 44894 states have internal predecessors, (65250), 10798 states have call successors, (10798), 3738 states have call predecessors, (10798), 4151 states have return successors, (15665), 10338 states have call predecessors, (15665), 10760 states have call successors, (15665) [2021-11-25 20:20:54,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58161 states to 58161 states and 91713 transitions. [2021-11-25 20:20:54,939 INFO L78 Accepts]: Start accepts. Automaton has 58161 states and 91713 transitions. Word has length 180 [2021-11-25 20:20:54,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:20:54,940 INFO L470 AbstractCegarLoop]: Abstraction has 58161 states and 91713 transitions. [2021-11-25 20:20:54,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 3 states have call successors, (32), 3 states have call predecessors, (32), 5 states have return successors, (31), 4 states have call predecessors, (31), 3 states have call successors, (31) [2021-11-25 20:20:54,941 INFO L276 IsEmpty]: Start isEmpty. Operand 58161 states and 91713 transitions. [2021-11-25 20:20:54,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-25 20:20:54,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:20:54,967 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:20:55,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-25 20:20:55,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f65b3431-4561-49fc-a248-2499a8240efb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 20:20:55,193 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:20:55,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:20:55,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1144994672, now seen corresponding path program 1 times [2021-11-25 20:20:55,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:20:55,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735914769] [2021-11-25 20:20:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:20:55,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:20:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:20:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2021-11-25 20:20:55,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:20:55,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735914769] [2021-11-25 20:20:55,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735914769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:20:55,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:20:55,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:20:55,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102403693] [2021-11-25 20:20:55,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:20:55,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:20:55,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:20:55,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:20:55,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:20:55,358 INFO L87 Difference]: Start difference. First operand 58161 states and 91713 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27)