./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_clnt_4.cil-1.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_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/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_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_clnt_4.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/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_9dfcf4ad-a4a4-498d-af90-d01c398ef523/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 ef0a7247f371c06426a6fd229da0de853cef924cb960a979813f84bccc63d5fc --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:02:53,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:02:53,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:02:53,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:02:53,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:02:53,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:02:53,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:02:53,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:02:53,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:02:53,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:02:53,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:02:53,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:02:53,653 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:02:53,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:02:53,657 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:02:53,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:02:53,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:02:53,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:02:53,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:02:53,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:02:53,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:02:53,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:02:53,687 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:02:53,688 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:02:53,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:02:53,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:02:53,698 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:02:53,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:02:53,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:02:53,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:02:53,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:02:53,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:02:53,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:02:53,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:02:53,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:02:53,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:02:53,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:02:53,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:02:53,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:02:53,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:02:53,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:02:53,712 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:02:53,760 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:02:53,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:02:53,761 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:02:53,761 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:02:53,762 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:02:53,762 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:02:53,762 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:02:53,762 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:02:53,763 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:02:53,763 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:02:53,764 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:02:53,764 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:02:53,764 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:02:53,764 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:02:53,765 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:02:53,765 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:02:53,765 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:02:53,765 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:02:53,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:02:53,766 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:02:53,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:02:53,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:02:53,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:02:53,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:02:53,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:02:53,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:02:53,767 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:02:53,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:02:53,768 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:02:53,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:02:53,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:02:53,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:02:53,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:02:53,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:02:53,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:02:53,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:02:53,770 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:02:53,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:02:53,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:02:53,770 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:02:53,771 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:02:53,771 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_9dfcf4ad-a4a4-498d-af90-d01c398ef523/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef0a7247f371c06426a6fd229da0de853cef924cb960a979813f84bccc63d5fc [2021-11-25 19:02:54,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:02:54,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:02:54,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:02:54,067 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:02:54,067 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:02:54,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/openssl-simplified/s3_clnt_4.cil-1.c [2021-11-25 19:02:54,142 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/data/eb0f55275/96f9c58565ad403a887671d01b50ac11/FLAG785c95c27 [2021-11-25 19:02:54,573 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:02:54,574 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/sv-benchmarks/c/openssl-simplified/s3_clnt_4.cil-1.c [2021-11-25 19:02:54,587 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/data/eb0f55275/96f9c58565ad403a887671d01b50ac11/FLAG785c95c27 [2021-11-25 19:02:54,601 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/data/eb0f55275/96f9c58565ad403a887671d01b50ac11 [2021-11-25 19:02:54,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:02:54,604 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:02:54,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:02:54,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:02:54,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:02:54,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:02:54" (1/1) ... [2021-11-25 19:02:54,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32beb85c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:54, skipping insertion in model container [2021-11-25 19:02:54,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:02:54" (1/1) ... [2021-11-25 19:02:54,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:02:54,681 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:02:54,895 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_9dfcf4ad-a4a4-498d-af90-d01c398ef523/sv-benchmarks/c/openssl-simplified/s3_clnt_4.cil-1.c[35886,35899] [2021-11-25 19:02:54,903 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:02:54,911 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:02:54,963 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_9dfcf4ad-a4a4-498d-af90-d01c398ef523/sv-benchmarks/c/openssl-simplified/s3_clnt_4.cil-1.c[35886,35899] [2021-11-25 19:02:54,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:02:54,979 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:02:54,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:54 WrapperNode [2021-11-25 19:02:54,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:02:54,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:02:54,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:02:54,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:02:54,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:54" (1/1) ... [2021-11-25 19:02:54,999 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:54" (1/1) ... [2021-11-25 19:02:55,041 INFO L137 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 508 [2021-11-25 19:02:55,042 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:02:55,043 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:02:55,043 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:02:55,043 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:02:55,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:54" (1/1) ... [2021-11-25 19:02:55,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:54" (1/1) ... [2021-11-25 19:02:55,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:54" (1/1) ... [2021-11-25 19:02:55,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:54" (1/1) ... [2021-11-25 19:02:55,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:54" (1/1) ... [2021-11-25 19:02:55,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:54" (1/1) ... [2021-11-25 19:02:55,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:54" (1/1) ... [2021-11-25 19:02:55,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:02:55,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:02:55,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:02:55,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:02:55,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:54" (1/1) ... [2021-11-25 19:02:55,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:02:55,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:55,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:02:55,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:02:55,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:02:55,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:02:55,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:02:55,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:02:55,281 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:02:55,283 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:02:55,311 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-25 19:02:55,876 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-11-25 19:02:55,876 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-11-25 19:02:55,876 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:02:56,021 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:02:56,022 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:02:56,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:02:56 BoogieIcfgContainer [2021-11-25 19:02:56,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:02:56,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:02:56,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:02:56,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:02:56,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:02:54" (1/3) ... [2021-11-25 19:02:56,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f5e44a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:02:56, skipping insertion in model container [2021-11-25 19:02:56,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:02:54" (2/3) ... [2021-11-25 19:02:56,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f5e44a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:02:56, skipping insertion in model container [2021-11-25 19:02:56,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:02:56" (3/3) ... [2021-11-25 19:02:56,034 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_4.cil-1.c [2021-11-25 19:02:56,044 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:02:56,044 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:02:56,090 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:02:56,097 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 19:02:56,097 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:02:56,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 83 states have (on average 1.7590361445783131) internal successors, (146), 84 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:56,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:02:56,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:56,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:02:56,122 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:56,127 INFO L85 PathProgramCache]: Analyzing trace with hash 602199862, now seen corresponding path program 1 times [2021-11-25 19:02:56,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:56,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787317010] [2021-11-25 19:02:56,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:56,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:56,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:56,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:56,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787317010] [2021-11-25 19:02:56,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787317010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:02:56,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:02:56,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:02:56,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755703537] [2021-11-25 19:02:56,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:02:56,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:02:56,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:56,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:02:56,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:02:56,414 INFO L87 Difference]: Start difference. First operand has 85 states, 83 states have (on average 1.7590361445783131) internal successors, (146), 84 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:56,596 INFO L93 Difference]: Finished difference Result 171 states and 295 transitions. [2021-11-25 19:02:56,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:02:56,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-25 19:02:56,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:56,607 INFO L225 Difference]: With dead ends: 171 [2021-11-25 19:02:56,607 INFO L226 Difference]: Without dead ends: 84 [2021-11-25 19:02:56,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 19:02:56,614 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:56,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 180 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:02:56,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-25 19:02:56,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-25 19:02:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.4578313253012047) internal successors, (121), 83 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:56,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 121 transitions. [2021-11-25 19:02:56,653 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 121 transitions. Word has length 19 [2021-11-25 19:02:56,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:56,654 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 121 transitions. [2021-11-25 19:02:56,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:56,654 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 121 transitions. [2021-11-25 19:02:56,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 19:02:56,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:56,656 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:02:56,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:02:56,656 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:56,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:56,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2014871544, now seen corresponding path program 1 times [2021-11-25 19:02:56,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:56,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14200582] [2021-11-25 19:02:56,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:56,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:02:56,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:56,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14200582] [2021-11-25 19:02:56,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14200582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:02:56,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:02:56,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:02:56,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028317771] [2021-11-25 19:02:56,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:02:56,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:02:56,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:56,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:02:56,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:02:56,725 INFO L87 Difference]: Start difference. First operand 84 states and 121 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:56,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:56,880 INFO L93 Difference]: Finished difference Result 180 states and 263 transitions. [2021-11-25 19:02:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:02:56,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-25 19:02:56,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:56,886 INFO L225 Difference]: With dead ends: 180 [2021-11-25 19:02:56,887 INFO L226 Difference]: Without dead ends: 99 [2021-11-25 19:02:56,892 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 19:02:56,894 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:56,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 130 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:02:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-25 19:02:56,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2021-11-25 19:02:56,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.4270833333333333) internal successors, (137), 96 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:56,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 137 transitions. [2021-11-25 19:02:56,923 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 137 transitions. Word has length 28 [2021-11-25 19:02:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:56,924 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 137 transitions. [2021-11-25 19:02:56,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:56,925 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 137 transitions. [2021-11-25 19:02:56,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 19:02:56,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:56,927 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] [2021-11-25 19:02:56,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:02:56,928 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:56,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:56,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1098351399, now seen corresponding path program 1 times [2021-11-25 19:02:56,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:56,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680248287] [2021-11-25 19:02:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:56,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:02:57,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:57,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680248287] [2021-11-25 19:02:57,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680248287] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:02:57,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:02:57,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:02:57,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640310859] [2021-11-25 19:02:57,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:02:57,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:02:57,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:57,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:02:57,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:02:57,003 INFO L87 Difference]: Start difference. First operand 97 states and 137 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:57,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:57,116 INFO L93 Difference]: Finished difference Result 208 states and 299 transitions. [2021-11-25 19:02:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:02:57,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-25 19:02:57,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:57,118 INFO L225 Difference]: With dead ends: 208 [2021-11-25 19:02:57,118 INFO L226 Difference]: Without dead ends: 114 [2021-11-25 19:02:57,119 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 19:02:57,121 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:57,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 141 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:02:57,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-25 19:02:57,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2021-11-25 19:02:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.3963963963963963) internal successors, (155), 111 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 155 transitions. [2021-11-25 19:02:57,130 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 155 transitions. Word has length 39 [2021-11-25 19:02:57,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:57,130 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 155 transitions. [2021-11-25 19:02:57,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:57,131 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 155 transitions. [2021-11-25 19:02:57,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 19:02:57,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:57,133 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:02:57,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:02:57,133 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:57,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:57,134 INFO L85 PathProgramCache]: Analyzing trace with hash -212303819, now seen corresponding path program 1 times [2021-11-25 19:02:57,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:57,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295732253] [2021-11-25 19:02:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:57,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:02:57,259 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:57,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295732253] [2021-11-25 19:02:57,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295732253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:57,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789112633] [2021-11-25 19:02:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:57,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:57,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:57,270 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:57,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:02:57,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:57,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:02:57,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-25 19:02:57,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:02:57,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789112633] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:02:57,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:02:57,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-11-25 19:02:57,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553397807] [2021-11-25 19:02:57,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:02:57,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:02:57,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:57,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:02:57,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:02:57,679 INFO L87 Difference]: Start difference. First operand 112 states and 155 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:57,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:57,920 INFO L93 Difference]: Finished difference Result 264 states and 384 transitions. [2021-11-25 19:02:57,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:02:57,921 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-25 19:02:57,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:57,924 INFO L225 Difference]: With dead ends: 264 [2021-11-25 19:02:57,925 INFO L226 Difference]: Without dead ends: 155 [2021-11-25 19:02:57,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:02:57,936 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 33 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:57,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 162 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:02:57,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-25 19:02:57,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 149. [2021-11-25 19:02:57,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.3243243243243243) internal successors, (196), 148 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:57,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 196 transitions. [2021-11-25 19:02:57,956 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 196 transitions. Word has length 52 [2021-11-25 19:02:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:57,957 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 196 transitions. [2021-11-25 19:02:57,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:57,958 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 196 transitions. [2021-11-25 19:02:57,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-25 19:02:57,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:57,966 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:02:58,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:58,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:58,186 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:58,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:58,187 INFO L85 PathProgramCache]: Analyzing trace with hash 204490708, now seen corresponding path program 1 times [2021-11-25 19:02:58,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:58,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216944142] [2021-11-25 19:02:58,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:58,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:58,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-25 19:02:58,256 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:58,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216944142] [2021-11-25 19:02:58,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216944142] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:02:58,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:02:58,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:02:58,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111975762] [2021-11-25 19:02:58,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:02:58,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:02:58,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:58,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:02:58,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:02:58,258 INFO L87 Difference]: Start difference. First operand 149 states and 196 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:58,386 INFO L93 Difference]: Finished difference Result 316 states and 425 transitions. [2021-11-25 19:02:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:02:58,386 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-25 19:02:58,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:58,395 INFO L225 Difference]: With dead ends: 316 [2021-11-25 19:02:58,395 INFO L226 Difference]: Without dead ends: 170 [2021-11-25 19:02:58,397 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 19:02:58,398 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:58,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 143 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:02:58,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-25 19:02:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2021-11-25 19:02:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.3053892215568863) internal successors, (218), 167 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:58,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 218 transitions. [2021-11-25 19:02:58,407 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 218 transitions. Word has length 68 [2021-11-25 19:02:58,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:58,407 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 218 transitions. [2021-11-25 19:02:58,407 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:58,407 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 218 transitions. [2021-11-25 19:02:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-25 19:02:58,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:58,409 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:02:58,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:02:58,409 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:58,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:58,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2115836599, now seen corresponding path program 1 times [2021-11-25 19:02:58,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:58,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625747355] [2021-11-25 19:02:58,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:58,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 19:02:58,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:58,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625747355] [2021-11-25 19:02:58,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625747355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:58,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011050625] [2021-11-25 19:02:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:58,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:58,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:58,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:58,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:02:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:58,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:02:58,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-25 19:02:58,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:02:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-25 19:02:59,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011050625] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:59,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:02:59,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 6 [2021-11-25 19:02:59,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454072128] [2021-11-25 19:02:59,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:02:59,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:02:59,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:02:59,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:02:59,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:02:59,088 INFO L87 Difference]: Start difference. First operand 168 states and 218 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:59,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:02:59,140 INFO L93 Difference]: Finished difference Result 332 states and 432 transitions. [2021-11-25 19:02:59,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:02:59,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-25 19:02:59,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:02:59,143 INFO L225 Difference]: With dead ends: 332 [2021-11-25 19:02:59,143 INFO L226 Difference]: Without dead ends: 330 [2021-11-25 19:02:59,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:02:59,144 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 76 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:02:59,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 201 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:02:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-25 19:02:59,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2021-11-25 19:02:59,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.3069908814589666) internal successors, (430), 329 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:59,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 430 transitions. [2021-11-25 19:02:59,156 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 430 transitions. Word has length 86 [2021-11-25 19:02:59,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:02:59,157 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 430 transitions. [2021-11-25 19:02:59,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:02:59,158 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 430 transitions. [2021-11-25 19:02:59,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-25 19:02:59,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:02:59,159 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:02:59,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:02:59,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:59,384 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:02:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:02:59,384 INFO L85 PathProgramCache]: Analyzing trace with hash -897175903, now seen corresponding path program 1 times [2021-11-25 19:02:59,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:02:59,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208337184] [2021-11-25 19:02:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:59,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:02:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:02:59,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:02:59,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208337184] [2021-11-25 19:02:59,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208337184] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:02:59,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861266163] [2021-11-25 19:02:59,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:02:59,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:02:59,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:02:59,478 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:02:59,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:02:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:02:59,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:02:59,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:02:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:02:59,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:03:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-25 19:03:00,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861266163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:03:00,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1293319939] [2021-11-25 19:03:00,120 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2021-11-25 19:03:00,120 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:03:00,124 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:03:00,130 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:03:00,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:03:17,252 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:03:36,802 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4140#(and (= 4432 |ULTIMATE.start_ssl3_connect_~s__state~0#1|) (<= |ULTIMATE.start_ssl3_connect_~initial_state#1| 12292) (= |ULTIMATE.start_ssl3_connect_~tmp___0~0#1| 0) (<= |ULTIMATE.start_ssl3_connect_~tmp___4~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~tmp___7~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_ssl3_connect_~s__s3__tmp__new_cipher~0#1|)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___3~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___7~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___2~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__s3__tmp__new_compression__id~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___1~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__ctx__stats__sess_hit~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~s__s3__flags~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___5~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~tmp___2~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___4~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__ctx__stats__sess_connect_good~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__ctx__stats__sess_connect_good~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~num1~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__ctx__stats__sess_connect_renegotiate~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__bbio~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__ctx__stats__sess_connect~0#1| 2147483648) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__ctx__stats__sess_connect~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__s3__tmp__cert_req~0#1| 2147483647) (<= 12292 |ULTIMATE.start_ssl3_connect_~initial_state#1|) (<= |ULTIMATE.start_ssl3_connect_~s__in_handshake~0#1| 2147483648) (<= |ULTIMATE.start_ssl3_connect_~s__info_callback~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~cb~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___9~0#1| 2147483648)) (= 5 |ULTIMATE.start_ssl3_connect_~blastFlag~0#1|) (<= |ULTIMATE.start_ssl3_connect_~tmp___1~0#1| 2147483647) (= 12292 |ULTIMATE.start_main_~s~0#1|) (<= |ULTIMATE.start_ssl3_connect_~tmp___9~0#1| 2147483647) (= |ULTIMATE.start_ssl3_connect_~s__init_num~0#1| 0) (<= |ULTIMATE.start_ssl3_connect_~s__bbio~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__s3__flags~0#1| 2147483648)) (<= 4368 |ULTIMATE.start_ssl3_connect_~state~0#1|) (<= |ULTIMATE.start_ssl3_connect_#in~initial_state#1| 12292) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~cb~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~state~0#1| 12292) (= |ULTIMATE.start_ssl3_connect_~skip~0#1| 0) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__ctx__stats__sess_hit~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__ctx__stats__sess_connect_renegotiate~0#1| 2147483648) (<= |ULTIMATE.start_ssl3_connect_~s__s3__tmp__new_cipher~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__s3__tmp__new_cipher__algorithms~0#1| 2147483648)) (= |ULTIMATE.start_ssl3_connect_~s__init_buf___0~0#1| 1) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__ctx__info_callback~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~ret~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__wbio~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__debug~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~num1~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__s3__tmp__reuse_message~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__s3__tmp__new_cipher__algorithms~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~tmp___5~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_ssl3_connect_~ret~0#1|)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__s3__tmp__cert_req~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__version~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__s3__tmp__new_compression~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__info_callback~0#1| 2147483648)) (<= 0 (+ 2147483647 |ULTIMATE.start_ssl3_connect_~s__in_handshake~0#1|)) (<= |ULTIMATE.start_ssl3_connect_~s__s3__tmp__reuse_message~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~tmp~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~s__version~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__s3__tmp__new_compression__id~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__ctx__info_callback~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___8~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp___6~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~s__hit~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__s3__tmp__new_compression~0#1| 2147483647) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_ssl3_connect_~s__wbio~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~tmp___3~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~tmp___6~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_connect_~tmp___8~0#1| 2147483647) (<= 12292 |ULTIMATE.start_ssl3_connect_#in~initial_state#1|) (= |#NULL.base| 0) (<= |ULTIMATE.start_ssl3_connect_~s__debug~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_connect_~tmp~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_connect_~s__hit~0#1| 2147483647))' at error location [2021-11-25 19:03:36,802 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:03:36,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:03:36,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 3] total 8 [2021-11-25 19:03:36,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078963759] [2021-11-25 19:03:36,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:03:36,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:03:36,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:36,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:03:36,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 19:03:36,806 INFO L87 Difference]: Start difference. First operand 330 states and 430 transitions. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 8 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:36,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:36,996 INFO L93 Difference]: Finished difference Result 715 states and 926 transitions. [2021-11-25 19:03:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:03:36,997 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 8 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-25 19:03:36,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:37,001 INFO L225 Difference]: With dead ends: 715 [2021-11-25 19:03:37,002 INFO L226 Difference]: Without dead ends: 713 [2021-11-25 19:03:37,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 19:03:37,003 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 602 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:37,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [602 Valid, 1279 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:03:37,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-11-25 19:03:37,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 492. [2021-11-25 19:03:37,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 1.3075356415478616) internal successors, (642), 491 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 642 transitions. [2021-11-25 19:03:37,019 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 642 transitions. Word has length 87 [2021-11-25 19:03:37,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:37,019 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 642 transitions. [2021-11-25 19:03:37,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 8 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:37,020 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 642 transitions. [2021-11-25 19:03:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-25 19:03:37,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:37,022 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 3, 3, 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] [2021-11-25 19:03:37,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:37,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 19:03:37,242 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:37,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:37,242 INFO L85 PathProgramCache]: Analyzing trace with hash 2134214837, now seen corresponding path program 2 times [2021-11-25 19:03:37,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:37,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587478007] [2021-11-25 19:03:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:37,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-25 19:03:37,333 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:37,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587478007] [2021-11-25 19:03:37,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587478007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:37,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:03:37,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:03:37,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643593263] [2021-11-25 19:03:37,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:37,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:03:37,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:37,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:03:37,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:03:37,336 INFO L87 Difference]: Start difference. First operand 492 states and 642 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:37,477 INFO L93 Difference]: Finished difference Result 1119 states and 1524 transitions. [2021-11-25 19:03:37,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:03:37,477 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-11-25 19:03:37,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:37,484 INFO L225 Difference]: With dead ends: 1119 [2021-11-25 19:03:37,484 INFO L226 Difference]: Without dead ends: 627 [2021-11-25 19:03:37,485 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 19:03:37,486 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 67 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:37,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 116 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:03:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-11-25 19:03:37,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 606. [2021-11-25 19:03:37,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 1.3636363636363635) internal successors, (825), 605 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 825 transitions. [2021-11-25 19:03:37,550 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 825 transitions. Word has length 122 [2021-11-25 19:03:37,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:37,552 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 825 transitions. [2021-11-25 19:03:37,552 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 825 transitions. [2021-11-25 19:03:37,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-25 19:03:37,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:37,553 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 4, 4, 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] [2021-11-25 19:03:37,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 19:03:37,554 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:37,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:37,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1951013804, now seen corresponding path program 1 times [2021-11-25 19:03:37,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:37,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661371601] [2021-11-25 19:03:37,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:37,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 250 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-25 19:03:37,627 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:37,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661371601] [2021-11-25 19:03:37,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661371601] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:37,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:03:37,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:03:37,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214277298] [2021-11-25 19:03:37,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:37,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:03:37,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:37,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:03:37,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:03:37,629 INFO L87 Difference]: Start difference. First operand 606 states and 825 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:37,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:37,729 INFO L93 Difference]: Finished difference Result 1104 states and 1493 transitions. [2021-11-25 19:03:37,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:03:37,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-11-25 19:03:37,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:37,733 INFO L225 Difference]: With dead ends: 1104 [2021-11-25 19:03:37,733 INFO L226 Difference]: Without dead ends: 501 [2021-11-25 19:03:37,734 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 19:03:37,736 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 11 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:37,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 140 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:03:37,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-25 19:03:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 495. [2021-11-25 19:03:37,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.3218623481781377) internal successors, (653), 494 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:37,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 653 transitions. [2021-11-25 19:03:37,754 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 653 transitions. Word has length 155 [2021-11-25 19:03:37,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:37,754 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 653 transitions. [2021-11-25 19:03:37,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:37,755 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 653 transitions. [2021-11-25 19:03:37,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-25 19:03:37,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:37,759 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 5, 5, 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] [2021-11-25 19:03:37,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:03:37,760 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:37,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:37,760 INFO L85 PathProgramCache]: Analyzing trace with hash -320390595, now seen corresponding path program 1 times [2021-11-25 19:03:37,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:37,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356658933] [2021-11-25 19:03:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:37,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:37,826 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 314 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-25 19:03:37,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:37,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356658933] [2021-11-25 19:03:37,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356658933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:37,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:03:37,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:03:37,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484218446] [2021-11-25 19:03:37,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:37,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:03:37,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:37,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:03:37,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:03:37,828 INFO L87 Difference]: Start difference. First operand 495 states and 653 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:37,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:37,938 INFO L93 Difference]: Finished difference Result 1037 states and 1371 transitions. [2021-11-25 19:03:37,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:03:37,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-11-25 19:03:37,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:37,942 INFO L225 Difference]: With dead ends: 1037 [2021-11-25 19:03:37,943 INFO L226 Difference]: Without dead ends: 545 [2021-11-25 19:03:37,943 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 19:03:37,944 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:37,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 144 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:03:37,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-25 19:03:37,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 541. [2021-11-25 19:03:37,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 1.3055555555555556) internal successors, (705), 540 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 705 transitions. [2021-11-25 19:03:37,961 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 705 transitions. Word has length 175 [2021-11-25 19:03:37,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:37,961 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 705 transitions. [2021-11-25 19:03:37,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 705 transitions. [2021-11-25 19:03:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-25 19:03:37,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:37,965 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 6, 6, 4, 4, 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] [2021-11-25 19:03:37,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:03:37,965 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:37,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:37,966 INFO L85 PathProgramCache]: Analyzing trace with hash 104944256, now seen corresponding path program 1 times [2021-11-25 19:03:37,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:37,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217066] [2021-11-25 19:03:37,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:37,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:38,043 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 415 proven. 65 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-25 19:03:38,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:38,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217066] [2021-11-25 19:03:38,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:38,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178860057] [2021-11-25 19:03:38,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:38,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:38,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:38,045 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:38,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:03:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:38,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:03:38,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:38,447 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 378 proven. 0 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2021-11-25 19:03:38,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:03:38,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178860057] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:38,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:03:38,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-25 19:03:38,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19213409] [2021-11-25 19:03:38,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:38,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:03:38,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:38,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:03:38,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:03:38,450 INFO L87 Difference]: Start difference. First operand 541 states and 705 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:38,602 INFO L93 Difference]: Finished difference Result 1195 states and 1575 transitions. [2021-11-25 19:03:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:03:38,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2021-11-25 19:03:38,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:38,607 INFO L225 Difference]: With dead ends: 1195 [2021-11-25 19:03:38,607 INFO L226 Difference]: Without dead ends: 657 [2021-11-25 19:03:38,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:03:38,608 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 39 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:38,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 161 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:03:38,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-11-25 19:03:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 649. [2021-11-25 19:03:38,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.2762345679012346) internal successors, (827), 648 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 827 transitions. [2021-11-25 19:03:38,628 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 827 transitions. Word has length 196 [2021-11-25 19:03:38,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:38,629 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 827 transitions. [2021-11-25 19:03:38,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:38,629 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 827 transitions. [2021-11-25 19:03:38,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-11-25 19:03:38,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:38,633 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 7, 7, 5, 5, 3, 3, 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] [2021-11-25 19:03:38,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:38,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 19:03:38,854 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:38,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:38,854 INFO L85 PathProgramCache]: Analyzing trace with hash -2089624731, now seen corresponding path program 1 times [2021-11-25 19:03:38,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:38,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245693466] [2021-11-25 19:03:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:38,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 482 proven. 78 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2021-11-25 19:03:38,968 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:38,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245693466] [2021-11-25 19:03:38,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245693466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:38,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694050162] [2021-11-25 19:03:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:38,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:38,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:38,970 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:38,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:03:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:39,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:03:39,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 448 proven. 0 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2021-11-25 19:03:39,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:03:39,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694050162] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:39,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:03:39,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-25 19:03:39,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171645642] [2021-11-25 19:03:39,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:39,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:03:39,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:39,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:03:39,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:03:39,420 INFO L87 Difference]: Start difference. First operand 649 states and 827 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:39,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:39,587 INFO L93 Difference]: Finished difference Result 1431 states and 1859 transitions. [2021-11-25 19:03:39,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:03:39,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 223 [2021-11-25 19:03:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:39,594 INFO L225 Difference]: With dead ends: 1431 [2021-11-25 19:03:39,604 INFO L226 Difference]: Without dead ends: 785 [2021-11-25 19:03:39,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:03:39,606 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 43 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:39,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 161 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:03:39,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-11-25 19:03:39,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 777. [2021-11-25 19:03:39,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 1.2487113402061856) internal successors, (969), 776 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 969 transitions. [2021-11-25 19:03:39,631 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 969 transitions. Word has length 223 [2021-11-25 19:03:39,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:39,631 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 969 transitions. [2021-11-25 19:03:39,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 969 transitions. [2021-11-25 19:03:39,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-25 19:03:39,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:39,639 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 19:03:39,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:39,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:39,854 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:39,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:39,854 INFO L85 PathProgramCache]: Analyzing trace with hash 462227647, now seen corresponding path program 1 times [2021-11-25 19:03:39,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:39,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603720565] [2021-11-25 19:03:39,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:39,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 549 proven. 91 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-25 19:03:39,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:39,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603720565] [2021-11-25 19:03:39,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603720565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:39,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465076024] [2021-11-25 19:03:39,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:39,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:39,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:39,954 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:39,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:03:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:40,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:03:40,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:40,558 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 471 proven. 169 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-25 19:03:40,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:03:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-11-25 19:03:40,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465076024] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:40,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:03:40,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 8 [2021-11-25 19:03:40,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299720657] [2021-11-25 19:03:40,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:40,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:03:40,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:40,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:03:40,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:03:40,848 INFO L87 Difference]: Start difference. First operand 777 states and 969 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:40,966 INFO L93 Difference]: Finished difference Result 1594 states and 2006 transitions. [2021-11-25 19:03:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:03:40,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 256 [2021-11-25 19:03:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:40,972 INFO L225 Difference]: With dead ends: 1594 [2021-11-25 19:03:40,972 INFO L226 Difference]: Without dead ends: 820 [2021-11-25 19:03:40,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:03:40,975 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 88 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:40,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 60 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:03:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-11-25 19:03:40,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 811. [2021-11-25 19:03:40,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 810 states have (on average 1.2679012345679013) internal successors, (1027), 810 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:41,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1027 transitions. [2021-11-25 19:03:41,000 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1027 transitions. Word has length 256 [2021-11-25 19:03:41,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:41,001 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 1027 transitions. [2021-11-25 19:03:41,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:41,001 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1027 transitions. [2021-11-25 19:03:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-25 19:03:41,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:41,006 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 13, 13, 11, 11, 9, 9, 7, 7, 5, 5, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:03:41,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:41,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 19:03:41,222 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:41,222 INFO L85 PathProgramCache]: Analyzing trace with hash -322572897, now seen corresponding path program 1 times [2021-11-25 19:03:41,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:41,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330978292] [2021-11-25 19:03:41,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:41,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 562 proven. 0 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2021-11-25 19:03:41,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:41,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330978292] [2021-11-25 19:03:41,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330978292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:41,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:03:41,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:03:41,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182322751] [2021-11-25 19:03:41,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:41,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:03:41,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:41,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:03:41,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:03:41,285 INFO L87 Difference]: Start difference. First operand 811 states and 1027 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:41,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:41,434 INFO L93 Difference]: Finished difference Result 1681 states and 2157 transitions. [2021-11-25 19:03:41,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:03:41,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 256 [2021-11-25 19:03:41,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:41,440 INFO L225 Difference]: With dead ends: 1681 [2021-11-25 19:03:41,440 INFO L226 Difference]: Without dead ends: 867 [2021-11-25 19:03:41,441 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 19:03:41,442 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 90 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:41,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 85 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:03:41,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2021-11-25 19:03:41,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 847. [2021-11-25 19:03:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.2777777777777777) internal successors, (1081), 846 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:41,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1081 transitions. [2021-11-25 19:03:41,470 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1081 transitions. Word has length 256 [2021-11-25 19:03:41,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:41,471 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1081 transitions. [2021-11-25 19:03:41,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:41,471 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1081 transitions. [2021-11-25 19:03:41,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-11-25 19:03:41,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:41,476 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 9, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 19:03:41,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 19:03:41,476 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:41,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:41,477 INFO L85 PathProgramCache]: Analyzing trace with hash 422727252, now seen corresponding path program 1 times [2021-11-25 19:03:41,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:41,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026476531] [2021-11-25 19:03:41,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:41,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:41,581 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 551 proven. 97 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-25 19:03:41,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:41,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026476531] [2021-11-25 19:03:41,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026476531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:41,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432284570] [2021-11-25 19:03:41,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:41,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:41,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:41,588 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:41,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:03:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:41,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:03:41,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 473 proven. 175 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-25 19:03:42,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:03:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-11-25 19:03:42,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432284570] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:42,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 19:03:42,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5] total 8 [2021-11-25 19:03:42,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625986754] [2021-11-25 19:03:42,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:42,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:03:42,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:42,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:03:42,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:03:42,523 INFO L87 Difference]: Start difference. First operand 847 states and 1081 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:42,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:42,653 INFO L93 Difference]: Finished difference Result 1700 states and 2170 transitions. [2021-11-25 19:03:42,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:03:42,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 257 [2021-11-25 19:03:42,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:42,659 INFO L225 Difference]: With dead ends: 1700 [2021-11-25 19:03:42,659 INFO L226 Difference]: Without dead ends: 856 [2021-11-25 19:03:42,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:03:42,663 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:42,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 55 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:03:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2021-11-25 19:03:42,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 847. [2021-11-25 19:03:42,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 1.2754137115839244) internal successors, (1079), 846 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1079 transitions. [2021-11-25 19:03:42,692 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1079 transitions. Word has length 257 [2021-11-25 19:03:42,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:42,692 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1079 transitions. [2021-11-25 19:03:42,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:42,693 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1079 transitions. [2021-11-25 19:03:42,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-25 19:03:42,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:42,698 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 12, 12, 10, 10, 8, 8, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 19:03:42,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:42,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:03:42,923 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:42,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:42,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1853317551, now seen corresponding path program 2 times [2021-11-25 19:03:42,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:42,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460605486] [2021-11-25 19:03:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:42,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 671 proven. 77 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-11-25 19:03:43,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:43,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460605486] [2021-11-25 19:03:43,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460605486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:43,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920268010] [2021-11-25 19:03:43,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:03:43,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:43,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:43,103 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:43,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:03:43,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-25 19:03:43,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:03:43,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 19:03:43,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:43,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 516 proven. 0 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2021-11-25 19:03:43,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:03:43,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920268010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:03:43,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:03:43,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-25 19:03:43,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067113678] [2021-11-25 19:03:43,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:03:43,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:03:43,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:03:43,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:03:43,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:03:43,545 INFO L87 Difference]: Start difference. First operand 847 states and 1079 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:43,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:03:43,697 INFO L93 Difference]: Finished difference Result 1769 states and 2285 transitions. [2021-11-25 19:03:43,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:03:43,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2021-11-25 19:03:43,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:03:43,703 INFO L225 Difference]: With dead ends: 1769 [2021-11-25 19:03:43,704 INFO L226 Difference]: Without dead ends: 925 [2021-11-25 19:03:43,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:03:43,706 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 33 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:03:43,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 141 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:03:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2021-11-25 19:03:43,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 917. [2021-11-25 19:03:43,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 1.2609170305676856) internal successors, (1155), 916 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:43,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1155 transitions. [2021-11-25 19:03:43,736 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1155 transitions. Word has length 269 [2021-11-25 19:03:43,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:03:43,737 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 1155 transitions. [2021-11-25 19:03:43,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:03:43,737 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1155 transitions. [2021-11-25 19:03:43,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-11-25 19:03:43,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:03:43,740 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 9, 9, 7, 7, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-25 19:03:43,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:03:43,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 19:03:43,961 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:03:43,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:03:43,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1567671545, now seen corresponding path program 1 times [2021-11-25 19:03:43,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:03:43,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570505973] [2021-11-25 19:03:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:43,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:03:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:44,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 616 proven. 240 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-25 19:03:44,099 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:03:44,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570505973] [2021-11-25 19:03:44,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570505973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:03:44,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261577620] [2021-11-25 19:03:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:03:44,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:03:44,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:03:44,102 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:03:44,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfcf4ad-a4a4-498d-af90-d01c398ef523/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:03:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:03:44,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:03:44,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:03:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 611 proven. 13 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-11-25 19:03:44,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:03:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 611 proven. 13 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-11-25 19:03:45,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261577620] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:03:45,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1512970457] [2021-11-25 19:03:45,087 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2021-11-25 19:03:45,088 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:03:45,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:03:45,089 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:03:45,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:05:01,821 INFO L180 IcfgInterpreter]: Interpretation finished